Skip to content
Related Articles

Related Articles

Improve Article

Python | Group strings at particular element in list

  • Last Updated : 05 Sep, 2019

Sometimes, while working with Python list, we can have a problem in which we have to group strings in a way that at occurrence of particular element, the string list is grouped. This can be a potential problem of day-day programming. Let’s discuss certain way in which this problem can be performed.

Method : Using groupby() + list comprehension + lambda
This task can be performed using combination of above functions. In this, we group the elements using groupby() and decision of grouping element logic is done in form of lambda function.




# Python3 code to demonstrate working of
# Group strings at particular element in list
# using groupby() + list comprehension + lambda
from itertools import groupby
  
# initialize lists
test_list = ['gfg', 'is', 'best', 'and', 'is', 'popular']
  
# printing original list
print("The original list is : " + str(test_list))
  
# initialize partition element
ele = 'is'
  
# Group strings at particular element in list
# using groupby() + list comprehension + lambda
res = [list(j) for i, j in groupby(test_list, lambda x:x == ele) if not i]
  
# printing result
print("Resultant list after grouping : " + str(res))
Output :
The original list is : ['gfg', 'is', 'best', 'and', 'is', 'popular']
Resultant list after grouping : [['gfg'], ['best', 'and'], ['popular']]

 Attention geek! Strengthen your foundations with the Python Programming Foundation Course and learn the basics.  

To begin with, your interview preparations Enhance your Data Structures concepts with the Python DS Course. And to begin with your Machine Learning Journey, join the Machine Learning – Basic Level Course

My Personal Notes arrow_drop_up
Recommended Articles
Page :