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� S( sB Load the pyproject.toml file.
Parameters:
use_pep517 - Has the user requested PEP 517 processing? None
means the user hasn't explicitly specified.
pyproject_toml - Location of the project's pyproject.toml file
setup_py - Location of the project's setup.py file
req_name - The name of the requirement we're processing (for
error reporting)
Returns:
None if we should use the legacy code path, otherwise a tuple
(
requirements from pyproject.toml,
name of PEP 517 backend,
requirements we should check are installed after setting
up the build environment
directory paths to import the backend from (backend-path),
relative to the project root.
)
t encodings utf-8Ns build-systemsI Disabling PEP 517 processing is invalid: project does not have a setup.pys
build-backendsb Disabling PEP 517 processing is invalid: project specifies a build backend of {} in pyproject.tomls setuptools>=40.8.0t wheelR s setuptools.build_meta:__legacy__sO {package} has a pyproject.toml file that does not comply with PEP 518: {reason}t packaget reasons] it has a 'build-system' table but not 'build-system.requires' which is mandatory in the tables1 'build-system.requires' is not a list of strings.s= 'build-system.requires' contains an invalid requirement: {!r}s backend-path( R R t isfilet iot openR t loadt gett NoneR t Truet formatt AssertionErrorR R R R ( t
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