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fix infer_freq raises section #32642

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Mar 12, 2020
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11 changes: 8 additions & 3 deletions pandas/tseries/frequencies.py
Original file line number Diff line number Diff line change
Expand Up @@ -249,9 +249,14 @@ def infer_freq(index, warn: bool = True) -> Optional[str]:
Returns
-------
str or None
None if no discernible frequency
TypeError if the index is not datetime-like
ValueError if there are less than three values.
None if no discernible frequency.

Raises
------
TypeError
If the index is not datetime-like.
ValueError
If there are fewer than three values.
"""
import pandas as pd

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