Add _Pickler and _Unpickler to stdlib/pickle #5506
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These are the pure-Python pickle implementation, and are sometimes used by code that wants to extend or override parts of the pickling/unpickling process.
JelleZijlstra
approved these changes
May 19, 2021
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Diff from mypy_primer, showing the effect of this PR on open source code: pandas (https://github.com/pandas-dev/pandas.git)
+ pandas/compat/pickle_compat.py:201: error: unused "type: ignore" comment
+ pandas/compat/pickle_compat.py:209: error: "Type[Unpickler]" has no attribute "dispatch" [attr-defined]
+ pandas/compat/pickle_compat.py:210: error: "Type[Unpickler]" has no attribute "dispatch" [attr-defined]
+ pandas/compat/pickle_compat.py:234: error: "Type[Unpickler]" has no attribute "dispatch" [attr-defined]
+ pandas/compat/pickle_compat.py:251: error: "Type[Unpickler]" has no attribute "dispatch" [attr-defined]
+ pandas/compat/pickle_compat.py:272: error: "Unpickler" has no attribute "is_verbose" [attr-defined]
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Hrm. I didn't realize that would be an issue. I used this with pyre on a file that was using dispatch and it made all of my errors go away. Fixing this will probably be more involved. Since |
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I created #5508 to add |
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These are the pure-Python pickle implementation, and are sometimes used
by code that wants to extend or override parts of the
pickling/unpickling process.