Pandas: Extract only words from a given column of a given DataFrame

Last update on May 28 2022 13:02:46 (UTC/GMT +8 hours)

Pandas: String and Regular Expression Exercise-37 with Solution

Write a Pandas program to extract only 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 Ave.','92 N. Bishop Ave.','9910 Golden Star Ave.', '102 Dunbar St.', '17 West Livingston Court']
})
print("Original DataFrame:")
print(df)

def search_words(text):
    result = re.findall(r'\b[^\d\W]+\b', text)
    return " ".join(result)

df['only_words']=df['address'].apply(lambda x : search_words(x))
print("\nOnly words:")
print(df)

Sample Output:

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

Only words:
  company_code          ...                       only_words
0         Abcd          ...                       Surrey Ave
1         EFGF          ...                     N Bishop Ave
2      zefsalf          ...                  Golden Star Ave
3      sdfslew          ...                        Dunbar St
4      zekfsdf          ...            West Livingston Court

[5 rows x 4 columns]

Python Code Editor:

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Previous: Write a Pandas program to extract date (format: mm-dd-yyyy) from a given column of a given DataFrame.
Next: Write a Pandas program to extract the sentences where a specific word is present in a given column of a given DataFrame.

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Python: Tips of the Day

Find current directory and file's directory:

To get the full path to the directory a Python file is contained in, write this in that file:

import os 
dir_path = os.path.dirname(os.path.realpath(__file__))

(Note that the incantation above won't work if you've already used os.chdir() to change your current working directory, since the value of the __file__ constant is relative to the current working directory and is not changed by an os.chdir() call.)

To get the current working directory use

import os
cwd = os.getcwd()

Documentation references for the modules, constants and functions used above:

The os and os.path modules.
The __file__ constant
os.path.realpath(path) (returns "the canonical path of the specified filename, eliminating any symbolic links encountered in the path")
os.path.dirname(path) (returns "the directory name of pathname path")
os.getcwd() (returns "a string representing the current working directory")
os.chdir(path) ("change the current working directory to path")

Ref: https://bit.ly/3fy0R6m