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Pandas Series | zfill method

Programming
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Python
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Pandas
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Documentation
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Series
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String Operations
schedule Jul 1, 2022
Last updated
local_offer PythonPandas
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Pandas Series.str.zfill(~) method left-fills each string of the Series with zeros until the specified width is reached.

WARNING

If the value is not of type string, then NaN will be returned for that value. If all the values are not of type string, then an error will be thrown.

Parameters

1. width | int

The desired length to fill until. If a string is larger than the specified width, then that string is left as is.

Return Value

A Series.

Examples

Basic usage

To left-fill each value of a Series to reach a length of 5:

s = pd.Series(["ab", "2", 2])
s.str.zfill(5)
0 000ab
1 00002
2 NaN
dtype: object

Notice how NaN is returned for 2 - this is because it is a not a string.

The overflow case

If a string is longer than the specified width, then that string is left as is:

s = pd.Series(["e", "abc", "3000"])
s.str.zfill(2)
0 0e
1 abc
2 3000
dtype: object
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Published by Isshin Inada
Edited by 0 others
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