Python – Custom Split Comma Separated Words

While working with Python, we can have problem in which we need to perform the task of splitting the words of string on spaces. But sometimes, we can have comma separated words, which have comma’s joined to words and require to split them separately. Lets discuss certain ways in which this task can be performed.
Method #1 : Using replace()
Using replace() is one way to solve this problem. In this, we just separate the joined comma from string to spaced so that they can be splitted along with other words correctly.

Python3

# Python3 code to demonstrate working of
# Custom Split Comma Separated Words
# Using replace()

# initializing string
test_str = 'geeksforgeeks, is, best, for, geeks'

# printing original string
print("The original string is : " + str(test_str))

# Distance between occurrences
# Using replace()
res = test_str.replace(", ", " , ").split()

# printing result
print("The strings after performing splits : " + str(res))

Output : 
The original string is : geeksforgeeks, is, best, for, geeks 
The strings after performing splits : [‘geeksforgeeks’, ‘, ‘, ‘is’, ‘, ‘, ‘best’, ‘, ‘, ‘for’, ‘, ‘, ‘geeks’] 

Method #2 : Using re.findall()
This problem can also be used using regex. In this, we find the occurrences of non space word and perform a split on that basis.

Python3

# Python3 code to demonstrate working of
# Custom Split Comma Separated Words
# Using re.findall()
import re

# initializing string
test_str = 'geeksforgeeks, is, best, for, geeks'

# printing original string
print("The original string is : " + str(test_str))

# Distance between occurrences
# Using re.findall()
res = re.findall(r'\w+|\S', test_str)

# printing result
print("The strings after performing splits : " + str(res))

Output : 
The original string is : geeksforgeeks, is, best, for, geeks 
The strings after performing splits : [‘geeksforgeeks’, ‘, ‘, ‘is’, ‘, ‘, ‘best’, ‘, ‘, ‘for’, ‘, ‘, ‘geeks’] 

The Time and Space Complexity for all the methods are the same:

Time Complexity: O(n)

Space Complexity: O(n)