Pandas: Convert all the string values to upper, lower cases in a given pandas series and also find the length of the string values

Last update on May 02 2025 12:52:33 (UTC/GMT +8 hours)

1. Convert String Cases & Length

Write a Pandas program to convert all the string values to upper, lower cases in a given pandas series. Also find the length of the string values.

Sample Solution:

Python Code :

import pandas as pd
import numpy as np
s = pd.Series(['X', 'Y', 'Z', 'Aaba', 'Baca', np.nan, 'CABA', None, 'bird', 'horse', 'dog'])
print("Original series:")
print(s)
print("\nConvert all string values of the said Series to upper case:")
print(s.str.upper())
print("\nConvert all string values of the said Series to lower case:")
print(s.str.lower())
print("\nLength of the string values of the said Series:")
print(s.str.len())

Sample Output:

Original series:
0         X
1         Y
2         Z
3      Aaba
4      Baca
5       NaN
6      CABA
7      None
8      bird
9     horse
10      dog
dtype: object

Convert all string values of the said Series to upper case:
0         X
1         Y
2         Z
3      AABA
4      BACA
5       NaN
6      CABA
7      None
8      BIRD
9     HORSE
10      DOG
dtype: object

Convert all string values of the said Series to lower case:
0         x
1         y
2         z
3      aaba
4      baca
5       NaN
6      caba
7      None
8      bird
9     horse
10      dog
dtype: object

Length of the string values of the said Series:
0     1.0
1     1.0
2     1.0
3     4.0
4     4.0
5     NaN
6     4.0
7     NaN
8     4.0
9     5.0
10    3.0
dtype: float64

For more Practice: Solve these Related Problems:

Write a Pandas program to convert all string values of a series to uppercase, lowercase, and then compute the length of each transformed string.
Write a Pandas program to change a series’ string values to both upper and lower case in one step and then create a new series with the string lengths.
Write a Pandas program to display a series with its string values converted to upper case, lower case, and title case, along with the length of the original string.
Write a Pandas program to transform a series by converting its strings to lower case and then append the length of each string as a suffix.

Go to:

Previous: Python Pandas String and Regular Expression Exercises Home.
Next: Write a Pandas program to remove whitespaces, left sided whitespaces and right sided whitespaces of the string values of a given pandas series.

Python Code Editor:

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