re: Merge overloaded functions by using unions #7349
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The signatures of these functions can also be modeled without overloads using unions as parameter types. While this shouldn't make any difference for type checking, it improves the UX for people using IDEs because having to cycle between subtly different function signatures isn't fun.
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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)
+ pandas/core/strings/object_array.py:216: error: Value of type variable "AnyStr" of "compile" cannot be "Union[str, Pattern[Any], Any]" [type-var]
+ pandas/core/array_algos/replace.py:88: error: Value of type variable "AnyStr" of "search" cannot be "Union[str, Pattern[Any], Any]" [type-var]
sphinx (https://github.com/sphinx-doc/sphinx)
+ sphinx/util/docstrings.py:20:22: error: Value of type variable "AnyStr" of "compile" cannot be "Union[str, Pattern[Any], Any]"
+ sphinx/util/docstrings.py: note: In function "separate_metadata":
+ sphinx/util/docstrings.py:39:30: error: Value of type "Union[str, Pattern[Any], Any]" is not indexable
+ sphinx/testing/util.py: note: In function "assert_re_search":
+ sphinx/testing/util.py:34:12: error: Value of type variable "AnyStr" of "search" cannot be "Union[str, Pattern[Any], Any]"
+ sphinx/testing/util.py: note: In function "assert_not_re_search":
+ sphinx/testing/util.py:39:8: error: Value of type variable "AnyStr" of "search" cannot be "Union[str, Pattern[Any], Any]"
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See also:
Unfortunately, there's a number of mypy bugs regarding constrained |
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Ah, well ... how unfortunate that mypy has such a limitation. I guess the tracking issue for that is python/mypy#11880? |
Yup 🙂 it might be good to add a comment to the |
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The signatures of these functions can also be modeled
without overloads using unions as parameter types.
While this shouldn't make any difference for type checking,
it improves the UX for people using IDEs because having to
cycle between subtly different function signatures isn't fun.