ruff/crates/ruff_linter/resources/test/fixtures/pycodestyle/E25.py
Dhruv Manilawala 4454fbf7e5
Fix E251 false positive inside f-strings (#7894)
## Summary

This PR fixes the bug where the rule `E251` was being triggered on a equal token
inside a f-string which was used in the context of debug expressions.

For example, the following was being flagged before the fix:

```python
print(f"{foo = }")
```

But, now it is not. This leads to false negatives such as:

```python
print(f"{foo(a = 1)}")
```

One solution would be to know if the opened parentheses was inside a f-string or
not. If it was then we can continue flagging until it's closed. If not, then we
should not flag it.

## Test Plan

Add new test cases and check that they don't raise any false positives.

fixes: #7882
2023-10-12 05:26:39 +00:00

61 lines
1.4 KiB
Python

#: E251 E251
def foo(bar = False):
'''Test function with an error in declaration'''
pass
#: E251
foo(bar= True)
#: E251
foo(bar =True)
#: E251 E251
foo(bar = True)
#: E251
y = bar(root= "sdasd")
#: E251:2:29
parser.add_argument('--long-option',
default=
"/rather/long/filesystem/path/here/blah/blah/blah")
#: E251:1:45
parser.add_argument('--long-option', default
="/rather/long/filesystem/path/here/blah/blah/blah")
#: E251:3:8 E251:3:10
foo(True,
baz=(1, 2),
biz = 'foo'
)
#: Okay
foo(bar=(1 == 1))
foo(bar=(1 != 1))
foo(bar=(1 >= 1))
foo(bar=(1 <= 1))
(options, args) = parser.parse_args()
d[type(None)] = _deepcopy_atomic
# Annotated Function Definitions
#: Okay
def munge(input: AnyStr, sep: AnyStr = None, limit=1000,
extra: Union[str, dict] = None) -> AnyStr:
pass
#: Okay
async def add(a: int = 0, b: int = 0) -> int:
return a + b
# Previously E251 four times
#: E271:1:6
async def add(a: int = 0, b: int = 0) -> int:
return a + b
#: E252:1:15 E252:1:16 E252:1:27 E252:1:36
def add(a: int=0, b: int =0, c: int= 0) -> int:
return a + b + c
#: Okay
def add(a: int = _default(name='f')):
return a
# F-strings
f"{a=}"
f"{a:=1}"
f"{foo(a=1)}"
f"normal {f"{a=}"} normal"
# Okay as the `=` is used inside a f-string...
print(f"{foo = }")
# ...but then it creates false negatives for now
print(f"{foo(a = 1)}")