split a liist in length

# Python code to split a list 
# into sublists of given length. 
  
from itertools import islice 
  
# Input list initialization 
Input = [1, 2, 3, 4, 5, 6, 7] 
  
# list of length in which we have to split 
length_to_split = [2, 1, 3, 1] 
  
# Using islice 
Inputt = iter(Input) 
Output = [list(islice(Inputt, elem)) 
          for elem in length_to_split] 
  
# Printing Output 
print("Initial list is:", Input) 
print("Split length list: ", length_to_split) 
print("List after splitting", Output)