Description
import pandas as pd
df = pd.DataFrame(columns=["a"])
col_map = {"a": "b"}
df.rename(columns=col_map)The above minimal example raises what appears to be a false type error on the last line due to passing columns=col_map:
Argument "columns" to "rename" of "DataFrame" has incompatible type "Dict[str, str]"; expected "Union[Mapping[Optional[Hashable], Any], Callable[[Optional[Hashable]], Optional[Hashable]], None]"mypy(error)
If instead I pass the dictionary as a literal value, the error disappears:
df.rename(columns={"a": "b"}) # all is well hereMetadata
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