Python – Split Numeric String into K digit integers

Last Updated : 02 Sep, 2020

Given a String, convert it to K digit integers

Input : test_str = ‘457336’, K = 2
Output : [45, 73, 36]
Explanation : Divided in 2 digit integers.
Input : test_str = ‘457336’, K = 3
Output : [457, 336]
Explanation : Divided in 3 digit integers.

Method #1 : Using int() + slice + loop

In this, we iterate for string and perform slicing till K digits and then perform task of conversion to integer using int().

Python3

# Python3 code to demonstrate working of 
# Split Numeric String into K digit integers
# Using int() + slice + loop
  
# initializing string
test_str = '457336842'
  
# printing original string
print("The original string is : " + str(test_str))
  
# initializing substring
K = 3
  
res = []
for idx in range(0, len(test_str), K):
      
    # converting to int, after slicing
    res.append(int(test_str[idx : idx + K]))
  
# printing result 
print("Converted number list : " + str(res)) 

Output

The original string is : 457336842
Converted number list : [457, 336, 842]

Method #2 : Using list comprehension + int() + slicing

Similar method to above, just a shorthand to solve this problem.

Python3

# Python3 code to demonstrate working of 
# Split Numeric String into K digit integers
# Using list comprehension + int() + slicing
  
# initializing string
test_str = '457336842'
  
# printing original string
print("The original string is : " + str(test_str))
  
# initializing substring
K = 3
  
# one liner to solve problem
res = [int(test_str[idx : idx + K]) for idx in range(0, len(test_str), K)]
  
# printing result 
print("Converted number list : " + str(res)) 

Output

The original string is : 457336842
Converted number list : [457, 336, 842]

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