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Pandas Series str | lstrip method

schedule Aug 10, 2023
Last updated
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PythonPandas
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Pandas Series str.lstrip(~) method removes the combination of the specified characters that appear from the left of each string in the Series.

Note that a new Series is returned, and the original is kept intact.

Parameters

1. to_strip | str or None | optional

The combination of the characters of to_strip that appears at the front of each string will be removed. For instance, if to_strip="ab", then abA and baA will both become A.

By default, leading whitespaces (including newlines and tabs) will be removed.

Return Value

A new Series or Index.

Examples

Basic usage

By default, lstrip(~) removes leading whitespaces (including newlines and tabs):

s = pd.Series([" ","a a","\na","\ta"])
s_stripped = s.str.lstrip()
s_stripped
0
1 a a
2 a
3 a
dtype: object

To confirm that the whitespaces have indeed been stripped, we print the length of each string:

s_stripped.str.len()
0 0
1 3
2 1
3 1
dtype: int64

Specifying to_strip

To remove a combination of the characters "ab" at the front:

s = pd.Series(["abA","baA"])
s.str.lstrip("ab")
0 A
1 A
dtype: object

Here, notice how "baA" got stripped down to "A" - this is because a combination of the specified characters is stripped ("ab" and "ba" in this case).

robocat
Published by Arthur Yanagisawa
Edited by 0 others
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