infer_freq(index, warn: 'bool' = True) -> 'str | None'

Parameters

index : DatetimeIndex or TimedeltaIndex

If passed a Series will use the values of the series (NOT THE INDEX).

warn : bool, default True

Raises

TypeError

If the index is not datetime-like.

ValueError

If there are fewer than three values.

Returns

str or None

None if no discernible frequency.

Infer the most likely frequency given the input index. If the frequency is uncertain, a warning will be printed.

Examples

This example is valid syntax, but we were not able to check execution

>>> idx = pd.date_range(start='2020/12/01', end='2020/12/30', periods=30)
... pd.infer_freq(idx)
'D'

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File: /pandas/tseries/frequencies.py#129
type: <class 'function'>
Commit: