newobject base object defines fallback Py2-compatible special methodspast.builtins module improvedsurrogateescape error handlernewlist typelistvalues and listitemsfuture.standard_library.* -> future.backportshttp.server and urllib modulesfuturize and pasteurize are useful to automate much of the
work of porting, particularly the boring repetitive text substitutions. They also
help to flag which parts of the code require attention.
Nevertheless, futurize and pasteurize are still incomplete and make
some mistakes, like 2to3, on which they are based. Please report bugs on
GitHub. Contributions to
the lib2to3-based fixers for futurize and pasteurize are
particularly welcome! Please see Contributing.
futurize doesn’t currently make the following change automatically:
Strings containing \U produce a SyntaxError on Python 3. An example is:
s = 'C:\Users'.
Python 2 expands this to s = 'C:\\Users', but Python 3 requires a raw
prefix (r'...'). This also applies to multi-line strings (including
multi-line docstrings).
Also see the tests in future/tests/test_futurize.py marked
@expectedFailure or @skip for known limitations.