Python – Ways to remove multiple empty spaces from string List

Sometimes, while working with Python strings, we have a problem in which we need to perform the removal of empty spaces in Strings. The problem of filtering a single space is easier. But sometimes we are unaware of number of spaces. This has application in many domains. Lets discuss certain ways in which this task can be performed.

Method #1 : Using loop + strip()
This is a way in which we can perform this task. In this, we strip the strings using strip(), it reduces to single space and then it can be tested for NULL value. Returns True if string is single space and hence helps in filtering.

filter_none

edit
close

play_arrow

link
brightness_4
code

# Python3 code to demonstrate working of 
# Remove multiple empty spaces from string List
# Using loop + strip()
  
# initializing list
test_list = ['gfg', '   ', ' ', 'is', '            ', 'best']
  
# printing original list
print("The original list is : " + str(test_list))
  
# Remove multiple empty spaces from string List
# Using loop + strip()
res = []
for ele in test_list:
    if ele.strip():
        res.append(ele)
      
# printing result 
print("List after filtering non-empty strings : " + str(res)) 

chevron_right


Output :

The original list is : ['gfg', '   ', ' ', 'is', '            ', 'best']
List after filtering non-empty strings : ['gfg', 'is', 'best']

 

Method #2 : Using list comprehension + strip()
The combination of above functions can also be used to perform this task. In this, we employ one-liner approach to perform this task instead of using loop.

filter_none

edit
close

play_arrow

link
brightness_4
code

# Python3 code to demonstrate working of 
# Remove multiple empty spaces from string List
# Using list comprehension + strip()
  
# initializing list
test_list = ['gfg', '   ', ' ', 'is', '            ', 'best']
  
# printing original list
print("The original list is : " + str(test_list))
  
# Remove multiple empty spaces from string List
# Using list comprehension + strip()
res = [ele for ele in test_list if ele.strip()]
      
# printing result 
print("List after filtering non-empty strings : " + str(res)) 

chevron_right


Output :

The original list is : ['gfg', '   ', ' ', 'is', '            ', 'best']
List after filtering non-empty strings : ['gfg', 'is', 'best']



My Personal Notes arrow_drop_up

Check out this Author's contributed articles.

If you like GeeksforGeeks and would like to contribute, you can also write an article using contribute.geeksforgeeks.org or mail your article to contribute@geeksforgeeks.org. See your article appearing on the GeeksforGeeks main page and help other Geeks.

Please Improve this article if you find anything incorrect by clicking on the "Improve Article" button below.