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TYP: remove ignore from pandas/tseries/frequencies.py II #53120

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merged 5 commits into from
May 8, 2023
Merged

TYP: remove ignore from pandas/tseries/frequencies.py II #53120

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a1d990b
remove mypy ignore[assignment] and cast index to TimedeltaArray
natmokval Apr 25, 2023
16e900f
Merge branch 'main' into 37715-remove-mypy-ignore-V
natmokval Apr 26, 2023
c90fc0e
Merge branch 'main' into 37715-remove-mypy-ignore-V
natmokval May 6, 2023
22b8337
remove check index.dtype is an object
natmokval May 7, 2023
1e83243
remove cast to TimedeltaArray
natmokval May 7, 2023
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18 changes: 5 additions & 13 deletions pandas/tseries/frequencies.py
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Original file line number Diff line number Diff line change
Expand Up @@ -140,10 +140,7 @@ def infer_freq(
>>> pd.infer_freq(idx)
'D'
"""
from pandas.core.api import (
DatetimeIndex,
Index,
)
from pandas.core.api import DatetimeIndex

if isinstance(index, ABCSeries):
values = index._values
Expand Down Expand Up @@ -172,15 +169,10 @@ def infer_freq(
inferer = _TimedeltaFrequencyInferer(index)
return inferer.get_freq()

if isinstance(index, Index) and not isinstance(index, DatetimeIndex):
if is_numeric_dtype(index.dtype):
raise TypeError(
f"cannot infer freq from a non-convertible index of dtype {index.dtype}"
)
# error: Incompatible types in assignment (expression has type
# "Union[ExtensionArray, ndarray[Any, Any]]", variable has type
# "Union[DatetimeIndex, TimedeltaIndex, Series, DatetimeLikeArrayMixin]")
index = index._values # type: ignore[assignment]
elif is_numeric_dtype(index.dtype):
raise TypeError(
f"cannot infer freq from a non-convertible index of dtype {index.dtype}"
)

if not isinstance(index, DatetimeIndex):
index = DatetimeIndex(index)
Expand Down