Pandas Series.add_prefix()

Pandas Series.add_prefix() method

In this tutorial, we'll go through examples for Series.add_prefix() method, which adds a prefix to the labels of a Pandas Series.

The syntax of Series.add_prefix(prefix) is:

Series.add_prefix(prefix, axis)

where

Parameter	Description
prefix	The string to add before each label.
axis	[Optional] Axis to add prefix on. For example, {0 or ‘index’, 1 or ‘columns’, None}. The default value is None.

Examples

1. Add prefix "item_" to the index labels of Series

In this example, we shall take a Series object in series with three string values, add the prefix "item_" to the labels of the Series object.

import pandas as pd

# Take a Series
series = pd.Series(["apple", "banana", "cherry"])

# Add a prefix to the labels
prefixed_series = series.add_prefix('item_')

# Print original and result Series
print("Original Series:")
print(series)

print("\nSeries after adding prefix:")
print(prefixed_series)

Output

Original Series:
0     apple
1    banana
2    cherry
dtype: object

Series after adding prefix:
item_0     apple
item_1    banana
item_2    cherry
dtype: object

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Summary

In this tutorial, we have seen about Series.add_prefix() method is a convenient way to add a prefix to the labels of a Pandas Series.