Pandas: Extract words starting with capital words from a given column of a given DataFrame

Last update on May 02 2025 12:51:46 (UTC/GMT +8 hours)

40. Extract Words Starting with Capital Letters

Write a Pandas program to extract words starting with capital words from a given column of a given DataFrame.

Sample Solution:

Python Code :

import pandas as pd
import re as re
df = pd.DataFrame({
    'company_code': ['Abcd','EFGF', 'zefsalf', 'sdfslew', 'zekfsdf'],
    'date_of_sale': ['12/05/2002','16/02/1999','05/09/1998','12/02/2022','15/09/1997'],
    'address': ['9910 Surrey Avenue','92 N. Bishop Avenue','9910 Golden Star Avenue', '102 Dunbar St.', '17 West Livingston Court']
})

print("Original DataFrame:")
print(df)

def find_capital_word(str1):
    result = re.findall(r'\b[A-Z]\w+', str1)
    return result

df['caps_word_in']=df['address'].apply(lambda cw : find_capital_word(cw))
print("\nExtract words starting with capital words from the sentences':")
print(df)

Sample Output:

Original DataFrame:
  company_code date_of_sale                   address
0         Abcd   12/05/2002        9910 Surrey Avenue
1         EFGF   16/02/1999       92 N. Bishop Avenue
2      zefsalf   05/09/1998   9910 Golden Star Avenue
3      sdfslew   12/02/2022            102 Dunbar St.
4      zekfsdf   15/09/1997  17 West Livingston Court

Extract words starting with capital words from the sentences':
  company_code            ...                           caps_word_in
0         Abcd            ...                       [Surrey, Avenue]
1         EFGF            ...                       [Bishop, Avenue]
2      zefsalf            ...                 [Golden, Star, Avenue]
3      sdfslew            ...                           [Dunbar, St]
4      zekfsdf            ...              [West, Livingston, Court]

[5 rows x 4 columns]

For more Practice: Solve these Related Problems:

Write a Pandas program to extract words that start with a capital letter from a DataFrame column using regex and then output them as a list.
Write a Pandas program to filter a text column for words beginning with uppercase letters and then join them into a new column.
Write a Pandas program to create a new series containing only the words starting with a capital letter from each row of a column.
Write a Pandas program to extract and count the occurrence of capitalized words in a column and then display the frequency distribution.

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Python Code Editor:

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