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Improve docstring for zfill #20861

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14 changes: 10 additions & 4 deletions pandas/core/strings.py
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Original file line number Diff line number Diff line change
Expand Up @@ -2114,14 +2114,20 @@ def rjust(self, width, fillchar=' '):

def zfill(self, width):
"""
Filling left side of strings in the Series/Index with 0.
Equivalent to :meth:`str.zfill`.
Pad strings in the Series/Index by prepending '0' characters.

Strings in the Series/Index are padded with prepending '0' characeters
(i.e. on the left of the string) to reach a total string length of `width`.
Strings in the Series/Index with length greater than `width` are unchanged.

Note: Differs from :meth:`str.zfill` which has special handling for '+'/'-'
characters in the string.

Parameters
----------
width : int
Minimum width of resulting string; additional characters will be
filled with 0
Minimum length of resulting string; strings with length less than `width`
will be prepended with '0' characters.

Returns
-------
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