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Python | Split string in groups of n consecutive characters

  • Difficulty Level : Basic
  • Last Updated : 24 Jun, 2020

Given a string (be it either string of numbers or characters), write a Python program to split the string by every nth character.


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Input : str = "Geeksforgeeks", n = 3
Output : ['Gee', 'ksf', 'oor', 'gee', 'ks']

Input : str = "1234567891234567", n = 4
Output : [1234, 5678, 9123, 4567]

Method #1: Using list comprehension

# Python code to split string
# by every 3rd number
# String initialization
string = "Geeksforgeeks"
# Defining splitting point
n = 3
# Using list comprehension
out = [(string[i:i+n]) for i in range(0, len(string), n)]
# Printing output
['Gee', 'ksf', 'org', 'eek', 's']

Method #2: Using zip_longest

# Python code to split string of number
# and character into every 4th number
# Importing
from itertools import zip_longest
# Group function using zip_longest to split
def group(n, iterable, fillvalue=None):
    args = [iter(iterable)] * n
    return zip_longest(fillvalue=fillvalue, *args)
# String initialization
str = '123GeeksForGeeks4567'
# Split point
# list of separated string
out_string = [''.join(lis) for lis in group(n, str, '')]
# Output list initialization
out_no = []
# Converting list of string into list of integer
for a in out_string:
# Printing list
['123G', 'eeks', 'ForG', 'eeks', '4567']

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