Python | Split flatten String List

Last Updated : 22 Apr, 2020

Sometimes, while working with Python Strings, we can have problem in which we need to perform the split of strings on a particular deliminitor. In this, we might need to flatten this to a single String List. Lets discuss certain ways in which this task can be performed.

Method #1 : Using list comprehension + split() + extend()
The combination of above functions can be used to perform this task. In this, we perform the task of split, using split() and add split elements in list using extend().

# Python3 code to demonstrate working of 
# Split flatten String List
# Using list comprehension + split() + extend()
      
# initializing list
test_list = ['gfg-is-best', 'for-all', 'geeks-and', 'CS']
  
# printing original list
print("The original list is : " + str(test_list))
  
# Split flatten String List
# Using list comprehension + split() + extend()
res = []
[res.extend(idx.split("-")) for idx in test_list] 
  
# printing result 
print("The String List after extension : " + str(res)) 

Output :

The original list is : ['gfg-is-best', 'for-all', 'geeks-and', 'CS']
The String List after extension : ['gfg', 'is', 'best', 'for', 'all', 'geeks', 'and', 'CS']

Method #2 : Using split() + join()
This is one of the way in which this task can be performed. In this, we perform the task of extension using join() and split().

# Python3 code to demonstrate working of 
# Split flatten String List
# Using split() + join()
      
# initializing list
test_list = ['gfg-is-best', 'for-all', 'geeks-and', 'CS']
  
# printing original list
print("The original list is : " + str(test_list))
  
# Split flatten String List
# Using split() + join()
res = '-'.join(test_list).split('-')
  
# printing result 
print("The String List after extension : " + str(res)) 

Output :

The original list is : ['gfg-is-best', 'for-all', 'geeks-and', 'CS']
The String List after extension : ['gfg', 'is', 'best', 'for', 'all', 'geeks', 'and', 'CS']

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