Current File : //proc/thread-self/root/proc/self/root/lib64/python2.7/idlelib/PyShell.py
#! /usr/bin/python2.7
from __future__ import print_function
import os
import os.path
import sys
import string
import getopt
import re
import socket
import time
import threading
import io
import linecache
from code import InteractiveInterpreter
from platform import python_version, system
try:
from Tkinter import *
except ImportError:
print("** IDLE can't import Tkinter.\n"
"Your Python may not be configured for Tk. **", file=sys.__stderr__)
sys.exit(1)
import tkMessageBox
from idlelib.EditorWindow import EditorWindow, fixwordbreaks
from idlelib.FileList import FileList
from idlelib.ColorDelegator import ColorDelegator
from idlelib.UndoDelegator import UndoDelegator
from idlelib.OutputWindow import OutputWindow
from idlelib.configHandler import idleConf
from idlelib import rpc
from idlelib import Debugger
from idlelib import RemoteDebugger
from idlelib import macosxSupport
from idlelib import IOBinding
IDENTCHARS = string.ascii_letters + string.digits + "_"
HOST = '127.0.0.1' # python execution server on localhost loopback
PORT = 0 # someday pass in host, port for remote debug capability
try:
from signal import SIGTERM
except ImportError:
SIGTERM = 15
# Override warnings module to write to warning_stream. Initialize to send IDLE
# internal warnings to the console. ScriptBinding.check_syntax() will
# temporarily redirect the stream to the shell window to display warnings when
# checking user's code.
warning_stream = sys.__stderr__ # None, at least on Windows, if no console.
import warnings
def idle_formatwarning(message, category, filename, lineno, line=None):
"""Format warnings the IDLE way."""
s = "\nWarning (from warnings module):\n"
s += ' File \"%s\", line %s\n' % (filename, lineno)
if line is None:
line = linecache.getline(filename, lineno)
line = line.strip()
if line:
s += " %s\n" % line
s += "%s: %s\n" % (category.__name__, message)
return s
def idle_showwarning(
message, category, filename, lineno, file=None, line=None):
"""Show Idle-format warning (after replacing warnings.showwarning).
The differences are the formatter called, the file=None replacement,
which can be None, the capture of the consequence AttributeError,
and the output of a hard-coded prompt.
"""
if file is None:
file = warning_stream
try:
file.write(idle_formatwarning(
message, category, filename, lineno, line=line))
file.write(">>> ")
except (AttributeError, IOError):
pass # if file (probably __stderr__) is invalid, skip warning.
_warnings_showwarning = None
def capture_warnings(capture):
"Replace warning.showwarning with idle_showwarning, or reverse."
global _warnings_showwarning
if capture:
if _warnings_showwarning is None:
_warnings_showwarning = warnings.showwarning
warnings.showwarning = idle_showwarning
else:
if _warnings_showwarning is not None:
warnings.showwarning = _warnings_showwarning
_warnings_showwarning = None
capture_warnings(True)
def extended_linecache_checkcache(filename=None,
orig_checkcache=linecache.checkcache):
"""Extend linecache.checkcache to preserve the <pyshell#...> entries
Rather than repeating the linecache code, patch it to save the
<pyshell#...> entries, call the original linecache.checkcache()
(skipping them), and then restore the saved entries.
orig_checkcache is bound at definition time to the original
method, allowing it to be patched.
"""
cache = linecache.cache
save = {}
for key in list(cache):
if key[:1] + key[-1:] == '<>':
save[key] = cache.pop(key)
orig_checkcache(filename)
cache.update(save)
# Patch linecache.checkcache():
linecache.checkcache = extended_linecache_checkcache
class PyShellEditorWindow(EditorWindow):
"Regular text edit window in IDLE, supports breakpoints"
def __init__(self, *args):
self.breakpoints = []
EditorWindow.__init__(self, *args)
self.text.bind("<<set-breakpoint-here>>", self.set_breakpoint_here)
self.text.bind("<<clear-breakpoint-here>>", self.clear_breakpoint_here)
self.text.bind("<<open-python-shell>>", self.flist.open_shell)
self.breakpointPath = os.path.join(idleConf.GetUserCfgDir(),
'breakpoints.lst')
# whenever a file is changed, restore breakpoints
def filename_changed_hook(old_hook=self.io.filename_change_hook,
self=self):
self.restore_file_breaks()
old_hook()
self.io.set_filename_change_hook(filename_changed_hook)
if self.io.filename:
self.restore_file_breaks()
self.color_breakpoint_text()
rmenu_specs = [
("Cut", "<<cut>>", "rmenu_check_cut"),
("Copy", "<<copy>>", "rmenu_check_copy"),
("Paste", "<<paste>>", "rmenu_check_paste"),
("Set Breakpoint", "<<set-breakpoint-here>>", None),
("Clear Breakpoint", "<<clear-breakpoint-here>>", None)
]
def color_breakpoint_text(self, color=True):
"Turn colorizing of breakpoint text on or off"
if self.io is None:
# possible due to update in restore_file_breaks
return
if color:
theme = idleConf.CurrentTheme()
cfg = idleConf.GetHighlight(theme, "break")
else:
cfg = {'foreground': '', 'background': ''}
self.text.tag_config('BREAK', cfg)
def set_breakpoint(self, lineno):
text = self.text
filename = self.io.filename
text.tag_add("BREAK", "%d.0" % lineno, "%d.0" % (lineno+1))
try:
self.breakpoints.index(lineno)
except ValueError: # only add if missing, i.e. do once
self.breakpoints.append(lineno)
try: # update the subprocess debugger
debug = self.flist.pyshell.interp.debugger
debug.set_breakpoint_here(filename, lineno)
except: # but debugger may not be active right now....
pass
def set_breakpoint_here(self, event=None):
text = self.text
filename = self.io.filename
if not filename:
text.bell()
return
lineno = int(float(text.index("insert")))
self.set_breakpoint(lineno)
def clear_breakpoint_here(self, event=None):
text = self.text
filename = self.io.filename
if not filename:
text.bell()
return
lineno = int(float(text.index("insert")))
try:
self.breakpoints.remove(lineno)
except:
pass
text.tag_remove("BREAK", "insert linestart",\
"insert lineend +1char")
try:
debug = self.flist.pyshell.interp.debugger
debug.clear_breakpoint_here(filename, lineno)
except:
pass
def clear_file_breaks(self):
if self.breakpoints:
text = self.text
filename = self.io.filename
if not filename:
text.bell()
return
self.breakpoints = []
text.tag_remove("BREAK", "1.0", END)
try:
debug = self.flist.pyshell.interp.debugger
debug.clear_file_breaks(filename)
except:
pass
def store_file_breaks(self):
"Save breakpoints when file is saved"
# XXX 13 Dec 2002 KBK Currently the file must be saved before it can
# be run. The breaks are saved at that time. If we introduce
# a temporary file save feature the save breaks functionality
# needs to be re-verified, since the breaks at the time the
# temp file is created may differ from the breaks at the last
# permanent save of the file. Currently, a break introduced
# after a save will be effective, but not persistent.
# This is necessary to keep the saved breaks synched with the
# saved file.
#
# Breakpoints are set as tagged ranges in the text.
# Since a modified file has to be saved before it is
# run, and since self.breakpoints (from which the subprocess
# debugger is loaded) is updated during the save, the visible
# breaks stay synched with the subprocess even if one of these
# unexpected breakpoint deletions occurs.
breaks = self.breakpoints
filename = self.io.filename
try:
with open(self.breakpointPath,"r") as old_file:
lines = old_file.readlines()
except IOError:
lines = []
try:
with open(self.breakpointPath,"w") as new_file:
for line in lines:
if not line.startswith(filename + '='):
new_file.write(line)
self.update_breakpoints()
breaks = self.breakpoints
if breaks:
new_file.write(filename + '=' + str(breaks) + '\n')
except IOError as err:
if not getattr(self.root, "breakpoint_error_displayed", False):
self.root.breakpoint_error_displayed = True
tkMessageBox.showerror(title='IDLE Error',
message='Unable to update breakpoint list:\n%s'
% str(err),
parent=self.text)
def restore_file_breaks(self):
self.text.update() # this enables setting "BREAK" tags to be visible
if self.io is None:
# can happen if IDLE closes due to the .update() call
return
filename = self.io.filename
if filename is None:
return
if os.path.isfile(self.breakpointPath):
lines = open(self.breakpointPath,"r").readlines()
for line in lines:
if line.startswith(filename + '='):
breakpoint_linenumbers = eval(line[len(filename)+1:])
for breakpoint_linenumber in breakpoint_linenumbers:
self.set_breakpoint(breakpoint_linenumber)
def update_breakpoints(self):
"Retrieves all the breakpoints in the current window"
text = self.text
ranges = text.tag_ranges("BREAK")
linenumber_list = self.ranges_to_linenumbers(ranges)
self.breakpoints = linenumber_list
def ranges_to_linenumbers(self, ranges):
lines = []
for index in range(0, len(ranges), 2):
lineno = int(float(ranges[index].string))
end = int(float(ranges[index+1].string))
while lineno < end:
lines.append(lineno)
lineno += 1
return lines
# XXX 13 Dec 2002 KBK Not used currently
# def saved_change_hook(self):
# "Extend base method - clear breaks if module is modified"
# if not self.get_saved():
# self.clear_file_breaks()
# EditorWindow.saved_change_hook(self)
def _close(self):
"Extend base method - clear breaks when module is closed"
self.clear_file_breaks()
EditorWindow._close(self)
class PyShellFileList(FileList):
"Extend base class: IDLE supports a shell and breakpoints"
# override FileList's class variable, instances return PyShellEditorWindow
# instead of EditorWindow when new edit windows are created.
EditorWindow = PyShellEditorWindow
pyshell = None
def open_shell(self, event=None):
if self.pyshell:
self.pyshell.top.wakeup()
else:
self.pyshell = PyShell(self)
if self.pyshell:
if not self.pyshell.begin():
return None
return self.pyshell
class ModifiedColorDelegator(ColorDelegator):
"Extend base class: colorizer for the shell window itself"
def __init__(self):
ColorDelegator.__init__(self)
self.LoadTagDefs()
def recolorize_main(self):
self.tag_remove("TODO", "1.0", "iomark")
self.tag_add("SYNC", "1.0", "iomark")
ColorDelegator.recolorize_main(self)
def LoadTagDefs(self):
ColorDelegator.LoadTagDefs(self)
theme = idleConf.CurrentTheme()
self.tagdefs.update({
"stdin": {'background':None,'foreground':None},
"stdout": idleConf.GetHighlight(theme, "stdout"),
"stderr": idleConf.GetHighlight(theme, "stderr"),
"console": idleConf.GetHighlight(theme, "console"),
})
def removecolors(self):
# Don't remove shell color tags before "iomark"
for tag in self.tagdefs:
self.tag_remove(tag, "iomark", "end")
class ModifiedUndoDelegator(UndoDelegator):
"Extend base class: forbid insert/delete before the I/O mark"
def insert(self, index, chars, tags=None):
try:
if self.delegate.compare(index, "<", "iomark"):
self.delegate.bell()
return
except TclError:
pass
UndoDelegator.insert(self, index, chars, tags)
def delete(self, index1, index2=None):
try:
if self.delegate.compare(index1, "<", "iomark"):
self.delegate.bell()
return
except TclError:
pass
UndoDelegator.delete(self, index1, index2)
class MyRPCClient(rpc.RPCClient):
def handle_EOF(self):
"Override the base class - just re-raise EOFError"
raise EOFError
class ModifiedInterpreter(InteractiveInterpreter):
def __init__(self, tkconsole):
self.tkconsole = tkconsole
locals = sys.modules['__main__'].__dict__
InteractiveInterpreter.__init__(self, locals=locals)
self.save_warnings_filters = None
self.restarting = False
self.subprocess_arglist = None
self.port = PORT
self.original_compiler_flags = self.compile.compiler.flags
_afterid = None
rpcclt = None
rpcpid = None
def spawn_subprocess(self):
if self.subprocess_arglist is None:
self.subprocess_arglist = self.build_subprocess_arglist()
args = self.subprocess_arglist
self.rpcpid = os.spawnv(os.P_NOWAIT, sys.executable, args)
def build_subprocess_arglist(self):
assert (self.port!=0), (
"Socket should have been assigned a port number.")
w = ['-W' + s for s in sys.warnoptions]
if 1/2 > 0: # account for new division
w.append('-Qnew')
# Maybe IDLE is installed and is being accessed via sys.path,
# or maybe it's not installed and the idle.py script is being
# run from the IDLE source directory.
del_exitf = idleConf.GetOption('main', 'General', 'delete-exitfunc',
default=False, type='bool')
if __name__ == 'idlelib.PyShell':
command = "__import__('idlelib.run').run.main(%r)" % (del_exitf,)
else:
command = "__import__('run').main(%r)" % (del_exitf,)
if sys.platform[:3] == 'win' and ' ' in sys.executable:
# handle embedded space in path by quoting the argument
decorated_exec = '"%s"' % sys.executable
else:
decorated_exec = sys.executable
return [decorated_exec] + w + ["-c", command, str(self.port)]
def start_subprocess(self):
addr = (HOST, self.port)
# GUI makes several attempts to acquire socket, listens for connection
for i in range(3):
time.sleep(i)
try:
self.rpcclt = MyRPCClient(addr)
break
except socket.error:
pass
else:
self.display_port_binding_error()
return None
# if PORT was 0, system will assign an 'ephemeral' port. Find it out:
self.port = self.rpcclt.listening_sock.getsockname()[1]
# if PORT was not 0, probably working with a remote execution server
if PORT != 0:
# To allow reconnection within the 2MSL wait (cf. Stevens TCP
# V1, 18.6), set SO_REUSEADDR. Note that this can be problematic
# on Windows since the implementation allows two active sockets on
# the same address!
self.rpcclt.listening_sock.setsockopt(socket.SOL_SOCKET,
socket.SO_REUSEADDR, 1)
self.spawn_subprocess()
#time.sleep(20) # test to simulate GUI not accepting connection
# Accept the connection from the Python execution server
self.rpcclt.listening_sock.settimeout(10)
try:
self.rpcclt.accept()
except socket.timeout:
self.display_no_subprocess_error()
return None
self.rpcclt.register("console", self.tkconsole)
self.rpcclt.register("stdin", self.tkconsole.stdin)
self.rpcclt.register("stdout", self.tkconsole.stdout)
self.rpcclt.register("stderr", self.tkconsole.stderr)
self.rpcclt.register("flist", self.tkconsole.flist)
self.rpcclt.register("linecache", linecache)
self.rpcclt.register("interp", self)
self.transfer_path(with_cwd=True)
self.poll_subprocess()
return self.rpcclt
def restart_subprocess(self, with_cwd=False, filename=''):
if self.restarting:
return self.rpcclt
self.restarting = True
# close only the subprocess debugger
debug = self.getdebugger()
if debug:
try:
# Only close subprocess debugger, don't unregister gui_adap!
RemoteDebugger.close_subprocess_debugger(self.rpcclt)
except:
pass
# Kill subprocess, spawn a new one, accept connection.
self.rpcclt.close()
self.unix_terminate()
console = self.tkconsole
was_executing = console.executing
console.executing = False
self.spawn_subprocess()
try:
self.rpcclt.accept()
except socket.timeout:
self.display_no_subprocess_error()
return None
self.transfer_path(with_cwd=with_cwd)
console.stop_readline()
# annotate restart in shell window and mark it
console.text.delete("iomark", "end-1c")
tag = 'RESTART: ' + (filename if filename else 'Shell')
halfbar = ((int(console.width) -len(tag) - 4) // 2) * '='
console.write("\n{0} {1} {0}".format(halfbar, tag))
console.text.mark_set("restart", "end-1c")
console.text.mark_gravity("restart", "left")
if not filename:
console.showprompt()
# restart subprocess debugger
if debug:
# Restarted debugger connects to current instance of debug GUI
RemoteDebugger.restart_subprocess_debugger(self.rpcclt)
# reload remote debugger breakpoints for all PyShellEditWindows
debug.load_breakpoints()
self.compile.compiler.flags = self.original_compiler_flags
self.restarting = False
return self.rpcclt
def __request_interrupt(self):
self.rpcclt.remotecall("exec", "interrupt_the_server", (), {})
def interrupt_subprocess(self):
threading.Thread(target=self.__request_interrupt).start()
def kill_subprocess(self):
if self._afterid is not None:
self.tkconsole.text.after_cancel(self._afterid)
try:
self.rpcclt.close()
except AttributeError: # no socket
pass
self.unix_terminate()
self.tkconsole.executing = False
self.rpcclt = None
def unix_terminate(self):
"UNIX: make sure subprocess is terminated and collect status"
if hasattr(os, 'kill'):
try:
os.kill(self.rpcpid, SIGTERM)
except OSError:
# process already terminated:
return
else:
try:
os.waitpid(self.rpcpid, 0)
except OSError:
return
def transfer_path(self, with_cwd=False):
if with_cwd: # Issue 13506
path = [''] # include Current Working Directory
path.extend(sys.path)
else:
path = sys.path
self.runcommand("""if 1:
import sys as _sys
_sys.path = %r
del _sys
\n""" % (path,))
active_seq = None
def poll_subprocess(self):
clt = self.rpcclt
if clt is None:
return
try:
response = clt.pollresponse(self.active_seq, wait=0.05)
except (EOFError, IOError, KeyboardInterrupt):
# lost connection or subprocess terminated itself, restart
# [the KBI is from rpc.SocketIO.handle_EOF()]
if self.tkconsole.closing:
return
response = None
self.restart_subprocess()
if response:
self.tkconsole.resetoutput()
self.active_seq = None
how, what = response
console = self.tkconsole.console
if how == "OK":
if what is not None:
print(repr(what), file=console)
elif how == "EXCEPTION":
if self.tkconsole.getvar("<<toggle-jit-stack-viewer>>"):
self.remote_stack_viewer()
elif how == "ERROR":
errmsg = "PyShell.ModifiedInterpreter: Subprocess ERROR:\n"
print(errmsg, what, file=sys.__stderr__)
print(errmsg, what, file=console)
# we received a response to the currently active seq number:
try:
self.tkconsole.endexecuting()
except AttributeError: # shell may have closed
pass
# Reschedule myself
if not self.tkconsole.closing:
self._afterid = self.tkconsole.text.after(
self.tkconsole.pollinterval, self.poll_subprocess)
debugger = None
def setdebugger(self, debugger):
self.debugger = debugger
def getdebugger(self):
return self.debugger
def open_remote_stack_viewer(self):
"""Initiate the remote stack viewer from a separate thread.
This method is called from the subprocess, and by returning from this
method we allow the subprocess to unblock. After a bit the shell
requests the subprocess to open the remote stack viewer which returns a
static object looking at the last exception. It is queried through
the RPC mechanism.
"""
self.tkconsole.text.after(300, self.remote_stack_viewer)
return
def remote_stack_viewer(self):
from idlelib import RemoteObjectBrowser
oid = self.rpcclt.remotequeue("exec", "stackviewer", ("flist",), {})
if oid is None:
self.tkconsole.root.bell()
return
item = RemoteObjectBrowser.StubObjectTreeItem(self.rpcclt, oid)
from idlelib.TreeWidget import ScrolledCanvas, TreeNode
top = Toplevel(self.tkconsole.root)
theme = idleConf.CurrentTheme()
background = idleConf.GetHighlight(theme, 'normal')['background']
sc = ScrolledCanvas(top, bg=background, highlightthickness=0)
sc.frame.pack(expand=1, fill="both")
node = TreeNode(sc.canvas, None, item)
node.expand()
# XXX Should GC the remote tree when closing the window
gid = 0
def execsource(self, source):
"Like runsource() but assumes complete exec source"
filename = self.stuffsource(source)
self.execfile(filename, source)
def execfile(self, filename, source=None):
"Execute an existing file"
if source is None:
source = open(filename, "r").read()
try:
code = compile(source, filename, "exec", dont_inherit=True)
except (OverflowError, SyntaxError):
self.tkconsole.resetoutput()
print('*** Error in script or command!\n'
'Traceback (most recent call last):',
file=self.tkconsole.stderr)
InteractiveInterpreter.showsyntaxerror(self, filename)
self.tkconsole.showprompt()
else:
self.runcode(code)
def runsource(self, source):
"Extend base class method: Stuff the source in the line cache first"
filename = self.stuffsource(source)
self.more = 0
self.save_warnings_filters = warnings.filters[:]
warnings.filterwarnings(action="error", category=SyntaxWarning)
if isinstance(source, unicode) and IOBinding.encoding != 'utf-8':
try:
source = '# -*- coding: %s -*-\n%s' % (
IOBinding.encoding,
source.encode(IOBinding.encoding))
except UnicodeError:
self.tkconsole.resetoutput()
self.write("Unsupported characters in input\n")
return
try:
# InteractiveInterpreter.runsource() calls its runcode() method,
# which is overridden (see below)
return InteractiveInterpreter.runsource(self, source, filename)
finally:
if self.save_warnings_filters is not None:
warnings.filters[:] = self.save_warnings_filters
self.save_warnings_filters = None
def stuffsource(self, source):
"Stuff source in the filename cache"
filename = "<pyshell#%d>" % self.gid
self.gid = self.gid + 1
lines = source.split("\n")
linecache.cache[filename] = len(source)+1, 0, lines, filename
return filename
def prepend_syspath(self, filename):
"Prepend sys.path with file's directory if not already included"
self.runcommand("""if 1:
_filename = %r
import sys as _sys
from os.path import dirname as _dirname
_dir = _dirname(_filename)
if not _dir in _sys.path:
_sys.path.insert(0, _dir)
del _filename, _sys, _dirname, _dir
\n""" % (filename,))
def showsyntaxerror(self, filename=None):
"""Extend base class method: Add Colorizing
Color the offending position instead of printing it and pointing at it
with a caret.
"""
text = self.tkconsole.text
stuff = self.unpackerror()
if stuff:
msg, lineno, offset, line = stuff
if lineno == 1:
pos = "iomark + %d chars" % (offset-1)
else:
pos = "iomark linestart + %d lines + %d chars" % \
(lineno-1, offset-1)
text.tag_add("ERROR", pos)
text.see(pos)
char = text.get(pos)
if char and char in IDENTCHARS:
text.tag_add("ERROR", pos + " wordstart", pos)
self.tkconsole.resetoutput()
self.write("SyntaxError: %s\n" % str(msg))
else:
self.tkconsole.resetoutput()
InteractiveInterpreter.showsyntaxerror(self, filename)
self.tkconsole.showprompt()
def unpackerror(self):
type, value, tb = sys.exc_info()
ok = type is SyntaxError
if ok:
try:
msg, (dummy_filename, lineno, offset, line) = value
if not offset:
offset = 0
except:
ok = 0
if ok:
return msg, lineno, offset, line
else:
return None
def showtraceback(self):
"Extend base class method to reset output properly"
self.tkconsole.resetoutput()
self.checklinecache()
InteractiveInterpreter.showtraceback(self)
if self.tkconsole.getvar("<<toggle-jit-stack-viewer>>"):
self.tkconsole.open_stack_viewer()
def checklinecache(self):
c = linecache.cache
for key in c.keys():
if key[:1] + key[-1:] != "<>":
del c[key]
def runcommand(self, code):
"Run the code without invoking the debugger"
# The code better not raise an exception!
if self.tkconsole.executing:
self.display_executing_dialog()
return 0
if self.rpcclt:
self.rpcclt.remotequeue("exec", "runcode", (code,), {})
else:
exec code in self.locals
return 1
def runcode(self, code):
"Override base class method"
if self.tkconsole.executing:
self.interp.restart_subprocess()
self.checklinecache()
if self.save_warnings_filters is not None:
warnings.filters[:] = self.save_warnings_filters
self.save_warnings_filters = None
debugger = self.debugger
try:
self.tkconsole.beginexecuting()
if not debugger and self.rpcclt is not None:
self.active_seq = self.rpcclt.asyncqueue("exec", "runcode",
(code,), {})
elif debugger:
debugger.run(code, self.locals)
else:
exec code in self.locals
except SystemExit:
if not self.tkconsole.closing:
if tkMessageBox.askyesno(
"Exit?",
"Do you want to exit altogether?",
default="yes",
parent=self.tkconsole.text):
raise
else:
self.showtraceback()
else:
raise
except:
if use_subprocess:
print("IDLE internal error in runcode()",
file=self.tkconsole.stderr)
self.showtraceback()
self.tkconsole.endexecuting()
else:
if self.tkconsole.canceled:
self.tkconsole.canceled = False
print("KeyboardInterrupt", file=self.tkconsole.stderr)
else:
self.showtraceback()
finally:
if not use_subprocess:
try:
self.tkconsole.endexecuting()
except AttributeError: # shell may have closed
pass
def write(self, s):
"Override base class method"
self.tkconsole.stderr.write(s)
def display_port_binding_error(self):
tkMessageBox.showerror(
"Port Binding Error",
"IDLE can't bind to a TCP/IP port, which is necessary to "
"communicate with its Python execution server. This might be "
"because no networking is installed on this computer. "
"Run IDLE with the -n command line switch to start without a "
"subprocess and refer to Help/IDLE Help 'Running without a "
"subprocess' for further details.",
parent=self.tkconsole.text)
def display_no_subprocess_error(self):
tkMessageBox.showerror(
"Subprocess Startup Error",
"IDLE's subprocess didn't make connection. Either IDLE can't "
"start a subprocess or personal firewall software is blocking "
"the connection.",
parent=self.tkconsole.text)
def display_executing_dialog(self):
tkMessageBox.showerror(
"Already executing",
"The Python Shell window is already executing a command; "
"please wait until it is finished.",
parent=self.tkconsole.text)
class PyShell(OutputWindow):
shell_title = "Python " + python_version() + " Shell"
# Override classes
ColorDelegator = ModifiedColorDelegator
UndoDelegator = ModifiedUndoDelegator
# Override menus
menu_specs = [
("file", "_File"),
("edit", "_Edit"),
("debug", "_Debug"),
("options", "_Options"),
("windows", "_Window"),
("help", "_Help"),
]
# New classes
from idlelib.IdleHistory import History
def __init__(self, flist=None):
if use_subprocess:
ms = self.menu_specs
if ms[2][0] != "shell":
ms.insert(2, ("shell", "She_ll"))
self.interp = ModifiedInterpreter(self)
if flist is None:
root = Tk()
fixwordbreaks(root)
root.withdraw()
flist = PyShellFileList(root)
#
OutputWindow.__init__(self, flist, None, None)
#
## self.config(usetabs=1, indentwidth=8, context_use_ps1=1)
self.usetabs = True
# indentwidth must be 8 when using tabs. See note in EditorWindow:
self.indentwidth = 8
self.context_use_ps1 = True
#
text = self.text
text.configure(wrap="char")
text.bind("<<newline-and-indent>>", self.enter_callback)
text.bind("<<plain-newline-and-indent>>", self.linefeed_callback)
text.bind("<<interrupt-execution>>", self.cancel_callback)
text.bind("<<end-of-file>>", self.eof_callback)
text.bind("<<open-stack-viewer>>", self.open_stack_viewer)
text.bind("<<toggle-debugger>>", self.toggle_debugger)
text.bind("<<toggle-jit-stack-viewer>>", self.toggle_jit_stack_viewer)
if use_subprocess:
text.bind("<<view-restart>>", self.view_restart_mark)
text.bind("<<restart-shell>>", self.restart_shell)
#
self.save_stdout = sys.stdout
self.save_stderr = sys.stderr
self.save_stdin = sys.stdin
from idlelib import IOBinding
self.stdin = PseudoInputFile(self, "stdin", IOBinding.encoding)
self.stdout = PseudoOutputFile(self, "stdout", IOBinding.encoding)
self.stderr = PseudoOutputFile(self, "stderr", IOBinding.encoding)
self.console = PseudoOutputFile(self, "console", IOBinding.encoding)
if not use_subprocess:
sys.stdout = self.stdout
sys.stderr = self.stderr
sys.stdin = self.stdin
#
self.history = self.History(self.text)
#
self.pollinterval = 50 # millisec
def get_standard_extension_names(self):
return idleConf.GetExtensions(shell_only=True)
reading = False
executing = False
canceled = False
endoffile = False
closing = False
_stop_readline_flag = False
def set_warning_stream(self, stream):
global warning_stream
warning_stream = stream
def get_warning_stream(self):
return warning_stream
def toggle_debugger(self, event=None):
if self.executing:
tkMessageBox.showerror("Don't debug now",
"You can only toggle the debugger when idle",
parent=self.text)
self.set_debugger_indicator()
return "break"
else:
db = self.interp.getdebugger()
if db:
self.close_debugger()
else:
self.open_debugger()
def set_debugger_indicator(self):
db = self.interp.getdebugger()
self.setvar("<<toggle-debugger>>", not not db)
def toggle_jit_stack_viewer(self, event=None):
pass # All we need is the variable
def close_debugger(self):
db = self.interp.getdebugger()
if db:
self.interp.setdebugger(None)
db.close()
if self.interp.rpcclt:
RemoteDebugger.close_remote_debugger(self.interp.rpcclt)
self.resetoutput()
self.console.write("[DEBUG OFF]\n")
sys.ps1 = ">>> "
self.showprompt()
self.set_debugger_indicator()
def open_debugger(self):
if self.interp.rpcclt:
dbg_gui = RemoteDebugger.start_remote_debugger(self.interp.rpcclt,
self)
else:
dbg_gui = Debugger.Debugger(self)
self.interp.setdebugger(dbg_gui)
dbg_gui.load_breakpoints()
sys.ps1 = "[DEBUG ON]\n>>> "
self.showprompt()
self.set_debugger_indicator()
def beginexecuting(self):
"Helper for ModifiedInterpreter"
self.resetoutput()
self.executing = 1
def endexecuting(self):
"Helper for ModifiedInterpreter"
self.executing = 0
self.canceled = 0
self.showprompt()
def close(self):
"Extend EditorWindow.close()"
if self.executing:
response = tkMessageBox.askokcancel(
"Kill?",
"Your program is still running!\n Do you want to kill it?",
default="ok",
parent=self.text)
if response is False:
return "cancel"
self.stop_readline()
self.canceled = True
self.closing = True
return EditorWindow.close(self)
def _close(self):
"Extend EditorWindow._close(), shut down debugger and execution server"
self.close_debugger()
if use_subprocess:
self.interp.kill_subprocess()
# Restore std streams
sys.stdout = self.save_stdout
sys.stderr = self.save_stderr
sys.stdin = self.save_stdin
# Break cycles
self.interp = None
self.console = None
self.flist.pyshell = None
self.history = None
EditorWindow._close(self)
def ispythonsource(self, filename):
"Override EditorWindow method: never remove the colorizer"
return True
def short_title(self):
return self.shell_title
COPYRIGHT = \
'Type "help", "copyright", "credits" or "license()" for more information.'
def begin(self):
self.resetoutput()
if use_subprocess:
nosub = ''
client = self.interp.start_subprocess()
if not client:
self.close()
return False
else:
nosub = "==== No Subprocess ===="
self.write("Python %s on %s\n%s\n%s" %
(sys.version, sys.platform, self.COPYRIGHT, nosub))
self.text.focus_force()
self.showprompt()
import Tkinter
Tkinter._default_root = None # 03Jan04 KBK What's this?
return True
def stop_readline(self):
if not self.reading: # no nested mainloop to exit.
return
self._stop_readline_flag = True
self.top.quit()
def readline(self):
save = self.reading
try:
self.reading = 1
self.top.mainloop() # nested mainloop()
finally:
self.reading = save
if self._stop_readline_flag:
self._stop_readline_flag = False
return ""
line = self.text.get("iomark", "end-1c")
if len(line) == 0: # may be EOF if we quit our mainloop with Ctrl-C
line = "\n"
if isinstance(line, unicode):
from idlelib import IOBinding
try:
line = line.encode(IOBinding.encoding)
except UnicodeError:
pass
self.resetoutput()
if self.canceled:
self.canceled = 0
if not use_subprocess:
raise KeyboardInterrupt
if self.endoffile:
self.endoffile = 0
line = ""
return line
def isatty(self):
return True
def cancel_callback(self, event=None):
try:
if self.text.compare("sel.first", "!=", "sel.last"):
return # Active selection -- always use default binding
except:
pass
if not (self.executing or self.reading):
self.resetoutput()
self.interp.write("KeyboardInterrupt\n")
self.showprompt()
return "break"
self.endoffile = 0
self.canceled = 1
if (self.executing and self.interp.rpcclt):
if self.interp.getdebugger():
self.interp.restart_subprocess()
else:
self.interp.interrupt_subprocess()
if self.reading:
self.top.quit() # exit the nested mainloop() in readline()
return "break"
def eof_callback(self, event):
if self.executing and not self.reading:
return # Let the default binding (delete next char) take over
if not (self.text.compare("iomark", "==", "insert") and
self.text.compare("insert", "==", "end-1c")):
return # Let the default binding (delete next char) take over
if not self.executing:
self.resetoutput()
self.close()
else:
self.canceled = 0
self.endoffile = 1
self.top.quit()
return "break"
def linefeed_callback(self, event):
# Insert a linefeed without entering anything (still autoindented)
if self.reading:
self.text.insert("insert", "\n")
self.text.see("insert")
else:
self.newline_and_indent_event(event)
return "break"
def enter_callback(self, event):
if self.executing and not self.reading:
return # Let the default binding (insert '\n') take over
# If some text is selected, recall the selection
# (but only if this before the I/O mark)
try:
sel = self.text.get("sel.first", "sel.last")
if sel:
if self.text.compare("sel.last", "<=", "iomark"):
self.recall(sel, event)
return "break"
except:
pass
# If we're strictly before the line containing iomark, recall
# the current line, less a leading prompt, less leading or
# trailing whitespace
if self.text.compare("insert", "<", "iomark linestart"):
# Check if there's a relevant stdin range -- if so, use it
prev = self.text.tag_prevrange("stdin", "insert")
if prev and self.text.compare("insert", "<", prev[1]):
self.recall(self.text.get(prev[0], prev[1]), event)
return "break"
next = self.text.tag_nextrange("stdin", "insert")
if next and self.text.compare("insert lineend", ">=", next[0]):
self.recall(self.text.get(next[0], next[1]), event)
return "break"
# No stdin mark -- just get the current line, less any prompt
indices = self.text.tag_nextrange("console", "insert linestart")
if indices and \
self.text.compare(indices[0], "<=", "insert linestart"):
self.recall(self.text.get(indices[1], "insert lineend"), event)
else:
self.recall(self.text.get("insert linestart", "insert lineend"), event)
return "break"
# If we're between the beginning of the line and the iomark, i.e.
# in the prompt area, move to the end of the prompt
if self.text.compare("insert", "<", "iomark"):
self.text.mark_set("insert", "iomark")
# If we're in the current input and there's only whitespace
# beyond the cursor, erase that whitespace first
s = self.text.get("insert", "end-1c")
if s and not s.strip():
self.text.delete("insert", "end-1c")
# If we're in the current input before its last line,
# insert a newline right at the insert point
if self.text.compare("insert", "<", "end-1c linestart"):
self.newline_and_indent_event(event)
return "break"
# We're in the last line; append a newline and submit it
self.text.mark_set("insert", "end-1c")
if self.reading:
self.text.insert("insert", "\n")
self.text.see("insert")
else:
self.newline_and_indent_event(event)
self.text.tag_add("stdin", "iomark", "end-1c")
self.text.update_idletasks()
if self.reading:
self.top.quit() # Break out of recursive mainloop() in raw_input()
else:
self.runit()
return "break"
def recall(self, s, event):
# remove leading and trailing empty or whitespace lines
s = re.sub(r'^\s*\n', '' , s)
s = re.sub(r'\n\s*$', '', s)
lines = s.split('\n')
self.text.undo_block_start()
try:
self.text.tag_remove("sel", "1.0", "end")
self.text.mark_set("insert", "end-1c")
prefix = self.text.get("insert linestart", "insert")
if prefix.rstrip().endswith(':'):
self.newline_and_indent_event(event)
prefix = self.text.get("insert linestart", "insert")
self.text.insert("insert", lines[0].strip())
if len(lines) > 1:
orig_base_indent = re.search(r'^([ \t]*)', lines[0]).group(0)
new_base_indent = re.search(r'^([ \t]*)', prefix).group(0)
for line in lines[1:]:
if line.startswith(orig_base_indent):
# replace orig base indentation with new indentation
line = new_base_indent + line[len(orig_base_indent):]
self.text.insert('insert', '\n'+line.rstrip())
finally:
self.text.see("insert")
self.text.undo_block_stop()
def runit(self):
line = self.text.get("iomark", "end-1c")
# Strip off last newline and surrounding whitespace.
# (To allow you to hit return twice to end a statement.)
i = len(line)
while i > 0 and line[i-1] in " \t":
i = i-1
if i > 0 and line[i-1] == "\n":
i = i-1
while i > 0 and line[i-1] in " \t":
i = i-1
line = line[:i]
self.interp.runsource(line)
def open_stack_viewer(self, event=None):
if self.interp.rpcclt:
return self.interp.remote_stack_viewer()
try:
sys.last_traceback
except:
tkMessageBox.showerror("No stack trace",
"There is no stack trace yet.\n"
"(sys.last_traceback is not defined)",
parent=self.text)
return
from idlelib.StackViewer import StackBrowser
StackBrowser(self.root, self.flist)
def view_restart_mark(self, event=None):
self.text.see("iomark")
self.text.see("restart")
def restart_shell(self, event=None):
"Callback for Run/Restart Shell Cntl-F6"
self.interp.restart_subprocess(with_cwd=True)
def showprompt(self):
self.resetoutput()
try:
s = str(sys.ps1)
except:
s = ""
self.console.write(s)
self.text.mark_set("insert", "end-1c")
self.set_line_and_column()
self.io.reset_undo()
def resetoutput(self):
source = self.text.get("iomark", "end-1c")
if self.history:
self.history.store(source)
if self.text.get("end-2c") != "\n":
self.text.insert("end-1c", "\n")
self.text.mark_set("iomark", "end-1c")
self.set_line_and_column()
sys.stdout.softspace = 0
def write(self, s, tags=()):
try:
self.text.mark_gravity("iomark", "right")
OutputWindow.write(self, s, tags, "iomark")
self.text.mark_gravity("iomark", "left")
except:
pass
if self.canceled:
self.canceled = 0
if not use_subprocess:
raise KeyboardInterrupt
def rmenu_check_cut(self):
try:
if self.text.compare('sel.first', '<', 'iomark'):
return 'disabled'
except TclError: # no selection, so the index 'sel.first' doesn't exist
return 'disabled'
return super(PyShell, self).rmenu_check_cut()
def rmenu_check_paste(self):
if self.text.compare('insert', '<', 'iomark'):
return 'disabled'
return super(PyShell, self).rmenu_check_paste()
class PseudoFile(io.TextIOBase):
def __init__(self, shell, tags, encoding=None):
self.shell = shell
self.tags = tags
self.softspace = 0
self._encoding = encoding
@property
def encoding(self):
return self._encoding
@property
def name(self):
return '<%s>' % self.tags
def isatty(self):
return True
class PseudoOutputFile(PseudoFile):
def writable(self):
return True
def write(self, s):
if self.closed:
raise ValueError("write to closed file")
if type(s) not in (unicode, str, bytearray):
# See issue #19481
if isinstance(s, unicode):
s = unicode.__getitem__(s, slice(None))
elif isinstance(s, str):
s = str.__str__(s)
elif isinstance(s, bytearray):
s = bytearray.__str__(s)
else:
raise TypeError('must be string, not ' + type(s).__name__)
return self.shell.write(s, self.tags)
class PseudoInputFile(PseudoFile):
def __init__(self, shell, tags, encoding=None):
PseudoFile.__init__(self, shell, tags, encoding)
self._line_buffer = ''
def readable(self):
return True
def read(self, size=-1):
if self.closed:
raise ValueError("read from closed file")
if size is None:
size = -1
elif not isinstance(size, (int, long)):
raise TypeError('must be int, not ' + type(size).__name__)
result = self._line_buffer
self._line_buffer = ''
if size < 0:
while True:
line = self.shell.readline()
if not line: break
result += line
else:
while len(result) < size:
line = self.shell.readline()
if not line: break
result += line
self._line_buffer = result[size:]
result = result[:size]
return result
def readline(self, size=-1):
if self.closed:
raise ValueError("read from closed file")
if size is None:
size = -1
elif not isinstance(size, (int, long)):
raise TypeError('must be int, not ' + type(size).__name__)
line = self._line_buffer or self.shell.readline()
if size < 0:
size = len(line)
eol = line.find('\n', 0, size)
if eol >= 0:
size = eol + 1
self._line_buffer = line[size:]
return line[:size]
def close(self):
self.shell.close()
def fix_x11_paste(root):
"Make paste replace selection on x11. See issue #5124."
if root._windowingsystem == 'x11':
for cls in 'Text', 'Entry', 'Spinbox':
root.bind_class(
cls,
'<<Paste>>',
'catch {%W delete sel.first sel.last}\n' +
root.bind_class(cls, '<<Paste>>'))
usage_msg = """\
USAGE: idle [-deins] [-t title] [file]*
idle [-dns] [-t title] (-c cmd | -r file) [arg]*
idle [-dns] [-t title] - [arg]*
-h print this help message and exit
-n run IDLE without a subprocess (see Help/IDLE Help for details)
The following options will override the IDLE 'settings' configuration:
-e open an edit window
-i open a shell window
The following options imply -i and will open a shell:
-c cmd run the command in a shell, or
-r file run script from file
-d enable the debugger
-s run $IDLESTARTUP or $PYTHONSTARTUP before anything else
-t title set title of shell window
A default edit window will be bypassed when -c, -r, or - are used.
[arg]* are passed to the command (-c) or script (-r) in sys.argv[1:].
Examples:
idle
Open an edit window or shell depending on IDLE's configuration.
idle foo.py foobar.py
Edit the files, also open a shell if configured to start with shell.
idle -est "Baz" foo.py
Run $IDLESTARTUP or $PYTHONSTARTUP, edit foo.py, and open a shell
window with the title "Baz".
idle -c "import sys; print sys.argv" "foo"
Open a shell window and run the command, passing "-c" in sys.argv[0]
and "foo" in sys.argv[1].
idle -d -s -r foo.py "Hello World"
Open a shell window, run a startup script, enable the debugger, and
run foo.py, passing "foo.py" in sys.argv[0] and "Hello World" in
sys.argv[1].
echo "import sys; print sys.argv" | idle - "foobar"
Open a shell window, run the script piped in, passing '' in sys.argv[0]
and "foobar" in sys.argv[1].
"""
def main():
global flist, root, use_subprocess
capture_warnings(True)
use_subprocess = True
enable_shell = False
enable_edit = False
debug = False
cmd = None
script = None
startup = False
try:
opts, args = getopt.getopt(sys.argv[1:], "c:deihnr:st:")
except getopt.error as msg:
print("Error: %s\n%s" % (msg, usage_msg), file=sys.stderr)
sys.exit(2)
for o, a in opts:
if o == '-c':
cmd = a
enable_shell = True
if o == '-d':
debug = True
enable_shell = True
if o == '-e':
enable_edit = True
if o == '-h':
sys.stdout.write(usage_msg)
sys.exit()
if o == '-i':
enable_shell = True
if o == '-n':
use_subprocess = False
if o == '-r':
script = a
if os.path.isfile(script):
pass
else:
print("No script file: ", script, file=sys.stderr)
sys.exit()
enable_shell = True
if o == '-s':
startup = True
enable_shell = True
if o == '-t':
PyShell.shell_title = a
enable_shell = True
if args and args[0] == '-':
cmd = sys.stdin.read()
enable_shell = True
# process sys.argv and sys.path:
for i in range(len(sys.path)):
sys.path[i] = os.path.abspath(sys.path[i])
if args and args[0] == '-':
sys.argv = [''] + args[1:]
elif cmd:
sys.argv = ['-c'] + args
elif script:
sys.argv = [script] + args
elif args:
enable_edit = True
pathx = []
for filename in args:
pathx.append(os.path.dirname(filename))
for dir in pathx:
dir = os.path.abspath(dir)
if dir not in sys.path:
sys.path.insert(0, dir)
else:
dir = os.getcwd()
if not dir in sys.path:
sys.path.insert(0, dir)
# check the IDLE settings configuration (but command line overrides)
edit_start = idleConf.GetOption('main', 'General',
'editor-on-startup', type='bool')
enable_edit = enable_edit or edit_start
enable_shell = enable_shell or not enable_edit
# start editor and/or shell windows:
root = Tk(className="Idle")
root.withdraw()
from idlelib.run import fix_scaling
fix_scaling(root)
# set application icon
icondir = os.path.join(os.path.dirname(__file__), 'Icons')
if system() == 'Windows':
iconfile = os.path.join(icondir, 'idle.ico')
root.wm_iconbitmap(default=iconfile)
elif TkVersion >= 8.5 and sys.platform != 'darwin':
ext = '.png' if TkVersion >= 8.6 else '.gif'
iconfiles = [os.path.join(icondir, 'idle_%d%s' % (size, ext))
for size in (16, 32, 48)]
icons = [PhotoImage(file=iconfile) for iconfile in iconfiles]
root.tk.call('wm', 'iconphoto', str(root), "-default", *icons)
fixwordbreaks(root)
fix_x11_paste(root)
flist = PyShellFileList(root)
macosxSupport.setupApp(root, flist)
if macosxSupport.isAquaTk():
# There are some screwed up <2> class bindings for text
# widgets defined in Tk which we need to do away with.
# See issue #24801.
root.unbind_class('Text', '<B2>')
root.unbind_class('Text', '<B2-Motion>')
root.unbind_class('Text', '<<PasteSelection>>')
if enable_edit:
if not (cmd or script):
for filename in args[:]:
if flist.open(filename) is None:
# filename is a directory actually, disconsider it
args.remove(filename)
if not args:
flist.new()
if enable_shell:
shell = flist.open_shell()
if not shell:
return # couldn't open shell
if macosxSupport.isAquaTk() and flist.dict:
# On OSX: when the user has double-clicked on a file that causes
# IDLE to be launched the shell window will open just in front of
# the file she wants to see. Lower the interpreter window when
# there are open files.
shell.top.lower()
else:
shell = flist.pyshell
# Handle remaining options. If any of these are set, enable_shell
# was set also, so shell must be true to reach here.
if debug:
shell.open_debugger()
if startup:
filename = os.environ.get("IDLESTARTUP") or \
os.environ.get("PYTHONSTARTUP")
if filename and os.path.isfile(filename):
shell.interp.execfile(filename)
if cmd or script:
shell.interp.runcommand("""if 1:
import sys as _sys
_sys.argv = %r
del _sys
\n""" % (sys.argv,))
if cmd:
shell.interp.execsource(cmd)
elif script:
shell.interp.prepend_syspath(script)
shell.interp.execfile(script)
elif shell:
# If there is a shell window and no cmd or script in progress,
# check for problematic OS X Tk versions and print a warning
# message in the IDLE shell window; this is less intrusive
# than always opening a separate window.
tkversionwarning = macosxSupport.tkVersionWarning(root)
if tkversionwarning:
shell.interp.runcommand("print('%s')" % tkversionwarning)
while flist.inversedict: # keep IDLE running while files are open.
root.mainloop()
root.destroy()
capture_warnings(False)
if __name__ == "__main__":
sys.modules['PyShell'] = sys.modules['__main__']
main()
capture_warnings(False) # Make sure turned off; see issue 18081
Mini Shell