Pandas: Split a string of a column of a given DataFrame into multiple columns

Last update on May 28 2022 13:02:41 (UTC/GMT +8 hours)

Pandas: String and Regular Expression Exercise-23 with Solution

Write a Pandas program to split a string of a column of a given DataFrame into multiple columns.

Sample Solution:

Python Code :

import pandas as pd
df = pd.DataFrame({
    'name': ['Alberto  Franco','Gino Ann Mcneill','Ryan  Parkes', 'Eesha Artur Hinton', 'Syed  Wharton'],
    'date_of_birth ': ['17/05/2002','16/02/1999','25/09/1998','11/05/2002','15/09/1997'],
    'age': [18.5, 21.2, 22.5, 22, 23]
})
print("Original DataFrame:")
print(df)
df[["first", "middle", "last"]] = df["name"].str.split(" ", expand = True)
print("\nNew DataFrame:")
print(df)

Sample Output:

Original DataFrame:
                 name date_of_birth    age
0     Alberto  Franco     17/05/2002  18.5
1    Gino Ann Mcneill     16/02/1999  21.2
2        Ryan  Parkes     25/09/1998  22.5
3  Eesha Artur Hinton     11/05/2002  22.0
4       Syed  Wharton     15/09/1997  23.0

New DataFrame:
                 name date_of_birth    age    first middle     last
0     Alberto  Franco     17/05/2002  18.5  Alberto          Franco
1    Gino Ann Mcneill     16/02/1999  21.2     Gino    Ann  Mcneill
2        Ryan  Parkes     25/09/1998  22.5     Ryan          Parkes
3  Eesha Artur Hinton     11/05/2002  22.0    Eesha  Artur   Hinton
4       Syed  Wharton     15/09/1997  23.0     Syed         Wharton

Python Code Editor:

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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