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Flag all comparisons against builtin types in E721 #8491

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merged 5 commits into from
Nov 6, 2023
Merged

Flag all comparisons against builtin types in E721 #8491

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Flag all comparisons against builtin types in E721
hauntsaninja Nov 5, 2023
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hauntsaninja Nov 5, 2023
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hauntsaninja Nov 5, 2023
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hauntsaninja Nov 6, 2023
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hauntsaninja Nov 6, 2023
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6 changes: 6 additions & 0 deletions crates/ruff_linter/resources/test/fixtures/pycodestyle/E721.py
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Original file line number Diff line number Diff line change
Expand Up @@ -53,6 +53,12 @@
if isinstance(res, memoryview):
pass
#: Okay
if type(res) is type:
pass
#: E721
if type(res) == type:
pass
#: Okay
def func_histype(a, b, c):
pass
#: E722
Expand Down
96 changes: 89 additions & 7 deletions crates/ruff_linter/src/rules/pycodestyle/rules/type_comparison.rs
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Expand Up @@ -198,16 +198,98 @@ fn is_type(expr: &Expr, semantic: &SemanticModel) -> bool {
// Ex) `type(obj) == int`
matches!(
id.as_str(),
"int"
| "str"
| "float"
| "bool"
| "complex"
"bool"
| "bytearray"
| "bytes"
| "list"
| "classmethod"
| "complex"
| "dict"
| "set"
| "enumerate"
| "filter"
| "float"
| "frozenset"
| "int"
| "list"
| "map"
| "memoryview"
| "object"
| "property"
| "range"
| "reversed"
| "set"
| "slice"
| "staticmethod"
| "str"
| "super"
| "tuple"
| "type"
| "zip"
| "ArithmeticError"
| "AssertionError"
| "AttributeError"
| "BaseException"
| "BlockingIOError"
| "BrokenPipeError"
| "BufferError"
| "BytesWarning"
| "ChildProcessError"
| "ConnectionAbortedError"
| "ConnectionError"
| "ConnectionRefusedError"
| "ConnectionResetError"
| "DeprecationWarning"
| "EnvironmentError"
| "EOFError"
| "Exception"
| "FileExistsError"
| "FileNotFoundError"
| "FloatingPointError"
| "FutureWarning"
| "GeneratorExit"
| "ImportError"
| "ImportWarning"
| "IndentationError"
| "IndexError"
| "InterruptedError"
| "IOError"
| "IsADirectoryError"
| "KeyboardInterrupt"
| "KeyError"
| "LookupError"
| "MemoryError"
| "ModuleNotFoundError"
| "NameError"
| "NotADirectoryError"
| "NotImplementedError"
| "OSError"
| "OverflowError"
| "PendingDeprecationWarning"
| "PermissionError"
| "ProcessLookupError"
| "RecursionError"
| "ReferenceError"
| "ResourceWarning"
| "RuntimeError"
| "RuntimeWarning"
| "StopAsyncIteration"
| "StopIteration"
| "SyntaxError"
| "SyntaxWarning"
| "SystemError"
| "SystemExit"
| "TabError"
| "TimeoutError"
| "TypeError"
| "UnboundLocalError"
| "UnicodeDecodeError"
| "UnicodeEncodeError"
| "UnicodeError"
| "UnicodeTranslateError"
| "UnicodeWarning"
| "UserWarning"
| "ValueError"
| "Warning"
| "ZeroDivisionError"
) && semantic.is_builtin(id)
}
_ => false,
Expand Down
20 changes: 10 additions & 10 deletions ...src/rules/pycodestyle/snapshots/ruff_linter__rules__pycodestyle__tests__E721_E721.py.snap
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Expand Up @@ -149,22 +149,22 @@ E721.py:41:8: E721 Do not compare types, use `isinstance()`
42 | #:
|

E721.py:101:12: E721 Do not compare types, use `isinstance()`
E721.py:107:12: E721 Do not compare types, use `isinstance()`
|
99 | def asdf(self, value: str | None):
100 | #: E721
101 | if type(value) is str:
105 | def asdf(self, value: str | None):
106 | #: E721
107 | if type(value) is str:
| ^^^^^^^^^^^^^^^^^^ E721
102 | ...
108 | ...
|

E721.py:111:12: E721 Do not compare types, use `isinstance()`
E721.py:117:12: E721 Do not compare types, use `isinstance()`
|
109 | def asdf(self, value: str | None):
110 | #: E721
111 | if type(value) is str:
115 | def asdf(self, value: str | None):
116 | #: E721
117 | if type(value) is str:
| ^^^^^^^^^^^^^^^^^^ E721
112 | ...
118 | ...
|


10 changes: 10 additions & 0 deletions .../pycodestyle/snapshots/ruff_linter__rules__pycodestyle__tests__preview__E721_E721.py.snap
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Original file line number Diff line number Diff line change
Expand Up @@ -119,4 +119,14 @@ E721.py:41:8: E721 Use `is` and `is not` for type comparisons, or `isinstance()`
42 | #:
|

E721.py:59:4: E721 Use `is` and `is not` for type comparisons, or `isinstance()` for isinstance checks
|
57 | pass
58 | #: E721
59 | if type(res) == type:
| ^^^^^^^^^^^^^^^^^ E721
60 | pass
61 | #: Okay
|