Given a list (may contain either strings or numbers), the task is to split the list by some value into two lists.
The approach is very simple. Split the first half of list by given value, and second half from the same value. There are multiple variations possible from this operation based on the requirement, like dropping the first/some element(s) in second half after the split value etc. Let’s see the different ways we can do this task.
Method #1: Using list index
# Python code to split the list # by some value into two lists. # List initialisation list = ['Geeks', 'forgeeks', 'is a', 'portal', 'for Geeks'] # Splitting list into first half first_list = list[:list.index('forgeeks')] # Splitting list into second half second_list = list[list.index('forgeeks')+1:] # Printing first list print(first_list) # Printing second list print(second_list) |
['Geeks'] ['is a', 'portal', 'for Geeks']
Method #2: Using dropwhile and set
# Python code to split the list # by some value into two lists. # Importing from itertools import dropwhile # List initialisation lst = ['Geeks', 'forgeeks', 'is a', 'portal', 'for Geeks'] # Using dropwhile to split into second list second_list = list(dropwhile(lambda x: x != 'forgeeks', lst))[1:] # Using set to get difference between two lists first_list = set(lst)-set(second_list) # removing 'split' string first_list.remove('forgeeks') # converting to list first_list = list(first_list) # Printing first list print(first_list) # Printing second list print(second_list) |
['Geeks'] ['is a', 'portal', 'for Geeks']
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Improved By : shubham_singh
