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Python program to split and join a string

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  • Difficulty Level : Basic
  • Last Updated : 23 Nov, 2022
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Python program to Split a string based on a delimiter and join the string using another delimiter. Splitting a string can be quite useful sometimes, especially when you need only certain parts of strings. A simple yet effective example is splitting the First-name and Last-name of a person. Another application is CSV(Comma Separated Files). We use split to get data from CSV and join to write data to CSV. In Python, we can use the function split() to split a string and join() to join a string. For a detailed articles on split() and join() functions, refer these : split() in Python and join() in Python. Examples :

Split the string into list of strings

Input : Geeks for Geeks
Output : ['Geeks', 'for', 'Geeks']

Join the list of strings into a string based on delimiter ('-')

Input :  ['Geeks', 'for', 'Geeks']
Output : Geeks-for-Geeks

Below is Python code to Split and Join the string based on a delimiter : 


# Python program to split a string and 
# join it using different delimiter
def split_string(string):
    # Split the string based on space delimiter
    list_string = string.split(' ')
    return list_string
def join_string(list_string):
    # Join the string based on '-' delimiter
    string = '-'.join(list_string)
    return string
# Driver Function
if __name__ == '__main__':
    string = 'Geeks for Geeks'
    # Splitting a string
    list_string = split_string(string)
     # Join list of strings into one
    new_string = join_string(list_string)


['Geeks', 'for', 'Geeks']

Method: In Python, we can use the function split() to split a string and join() to join a string. the split() method in Python split a string into a list of strings after breaking the given string by the specified separator. Python String join() method is a string method and returns a string in which the elements of the sequence have been joined by the str separator. 


# Python code
# to split and join given string
# input string
s = 'Geeks for Geeks'
# print the string after split method
print(s.split(" "))
# print the string after join method
# this code is contributed by gangarajula laxmi


['Geeks', 'for', 'Geeks']

Time complexity: O(n), where n is the length of given string
Auxiliary space: O(n)

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