newobject
base object defines fallback Py2-compatible special methodspast.builtins
module improvedsurrogateescape
error handlernewlist
typelistvalues
and listitems
future.standard_library.*
-> future.backports
http.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.