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`redefined-loop-name` (`PLW2901`)

crates/ruff_linter/resources/mdtest/pylint/redefined-loop-name.md

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redefined-loop-name (PLW2901)

toml
[lint]
select = ["PLW2901"]

Augmented assignment

Ignore in-place update of a mutable type.

py
for i in []:
    i += [1]

for i in []:
    i = [1]  # snapshot: redefined-loop-name

for i in []:
    i |= {"a": 1}

for i in []:
    i = {"b": 2}  # snapshot: redefined-loop-name

for i in []:
    i |= {1}

for i in []:
    i &= {1}

for i in []:
    i ^= {1}

for i in []:
    i -= {1}

for i in []:
    i = {1} # snapshot: redefined-loop-name

for i in []:
    i += (1,)  # snapshot: redefined-loop-name

for i in []:
    i += "a"  # snapshot: redefined-loop-name
snapshot
error[PLW2901]: `for` loop variable `i` overwritten by assignment target
 --> src/mdtest_snippet.py:5:5
  |
5 |     i = [1]  # snapshot: redefined-loop-name
  |     ^
  |


error[PLW2901]: `for` loop variable `i` overwritten by assignment target
  --> src/mdtest_snippet.py:11:5
   |
11 |     i = {"b": 2}  # snapshot: redefined-loop-name
   |     ^
   |


error[PLW2901]: `for` loop variable `i` overwritten by assignment target
  --> src/mdtest_snippet.py:26:5
   |
26 |     i = {1} # snapshot: redefined-loop-name
   |     ^
   |


error[PLW2901]: `for` loop variable `i` overwritten by assignment target
  --> src/mdtest_snippet.py:29:5
   |
29 |     i += (1,)  # snapshot: redefined-loop-name
   |     ^
   |


error[PLW2901]: `for` loop variable `i` overwritten by assignment target
  --> src/mdtest_snippet.py:32:5
   |
32 |     i += "a"  # snapshot: redefined-loop-name
   |     ^
   |