Don't warn about returning Any if it is a proper subtype of the return type #3473
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JukkaL
approved these changes
May 30, 2017
|
Thanks! |
gvanrossum
reviewed
May 30, 2017
| @@ -1874,7 +1874,8 @@ def check_return_stmt(self, s: ReturnStmt) -> None: | |||
| if isinstance(typ, AnyType): | |||
| # (Unless you asked to be warned in that case, and the | |||
| # function is not declared to return Any) | |||
| if not isinstance(return_type, AnyType) and self.options.warn_return_any: | |||
| if (not is_proper_subtype(AnyType(), return_type) and | |||
| self.options.warn_return_any): | |||
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I would have tested for the option first, an attribute access is cheaper than a call. It's a reflexive optimization that often also leads to clearer code (often it's a wash).
carljm
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to carljm/mypy
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this pull request
May 30, 2017
* master: (23 commits) Make return type of open() more precise (python#3477) Add test cases that delete a file during incremental checking (python#3461) Parse each format-string component separately (python#3390) Don't warn about returning Any if it is a proper subtype of the return type (python#3473) Add __setattr__ support (python#3451) Remove bundled lib-typing (python#3337) Move version of extensions to post-release (python#3348) Fix None slice bounds with strict-optional (python#3445) Allow NewType subclassing NewType. (python#3465) Add console scripts (python#3074) Fix 'variance' label. Change label for variance section to just 'variance' (python#3429) Better error message for invalid package names passed to mypy (python#3447) Fix last character cut in html-report if file does not end with newline (python#3466) Print pytest output as it happens (python#3463) Add mypy roadmap (python#3460) Add flag to avoid interpreting arguments with a default of None as Optional (python#3248) Add type checking plugin support for functions (python#3299) Mismatch of inferred type and return type note (python#3428) Sync typeshed (python#3449) ...
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Fixes #3472
One-line fix, title says it all.