fillna(self, value: 'object | ArrayLike | None' = None, method: 'FillnaOptions | None' = None, limit: 'int | None' = None)
If a scalar value is passed it is used to fill all missing values. Alternatively, an array-like 'value' can be given. It's expected that the array-like have the same length as 'self'.
Method to use for filling holes in reindexed Series pad / ffill: propagate last valid observation forward to next valid backfill / bfill: use NEXT valid observation to fill gap.
If method is specified, this is the maximum number of consecutive NaN values to forward/backward fill. In other words, if there is a gap with more than this number of consecutive NaNs, it will only be partially filled. If method is not specified, this is the maximum number of entries along the entire axis where NaNs will be filled.
With NA/NaN filled.
Fill NA/NaN values using the specified method.
The following pages refer to to this document either explicitly or contain code examples using this.
pandas.core.arrays.base.ExtensionArray._fill_mask_inplace
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