__init__.py 文件源码

def setup_detect_python2():
        """
        Call this before using the refactoring tools to create them on demand
        if needed.
        """
        if None in [RTs._rt_py2_detect, RTs._rtp_py2_detect]:
            RTs._rt_py2_detect = RefactoringTool(py2_detect_fixers)
            RTs._rtp_py2_detect = RefactoringTool(py2_detect_fixers,
                                                  {'print_function': True})


# We need to find a prefix for the standard library, as we don't want to
# process any files there (they will already be Python 3).
#
# The following method is used by Sanjay Vinip in uprefix. This fails for
# ``conda`` environments:
#     # In a non-pythonv virtualenv, sys.real_prefix points to the installed Python.
#     # In a pythonv venv, sys.base_prefix points to the installed Python.
#     # Outside a virtual environment, sys.prefix points to the installed Python.

#     if hasattr(sys, 'real_prefix'):
#         _syslibprefix = sys.real_prefix
#     else:
#         _syslibprefix = getattr(sys, 'base_prefix', sys.prefix)

# Instead, we use the portion of the path common to both the stdlib modules
# ``math`` and ``urllib``.