Python | Split a list having single integer

Given a list containing single integer, the task is to split each value in the list. 

Examples: 

Input: Input = [23]
Output: Output  = [2, 3]

Input: Input = [15478]
Output: Output  = [1, 5, 4, 7, 8]

Method #1 : Using Map

Python3

# Python code to split list containing single integer

# List initialization
input = [200]

# Using map
output = list(map(int, str(input[0])))

# Printing output
print(output)

Output:

[2, 0, 0]

Method #2 : Using list comprehension

Python3

# Python code to split list containing single integer

# List initialization
input = [231]

# Using list comprehension
output = [int(x) if x.isdigit() else x
          for z in input for x in str(z)]

# Printing output
print(output)

Output:

[2, 3, 1]

Method #3 : Using Loops

Python3

# Python code to split list containing single integer

# List initialization
input = [987]

# Converting to int
input = int(input[0])

# Output list initialization
output = []

while input>0:
    rem = input % 10
    input = int(input / 10)
    output.append(rem)

# Printing output
print(output)

Output:

[7, 8, 9]

Method #4 : Using string manipulation instead of integer manipulation

Step-by-step approach:

• Initialize the input list with a single integer
• Convert the integer to a string using the str() function
• Use a for loop to iterate over the characters of the string
• Convert each character back to an integer using the int() function
• Append the integer to the output list
• Print the output list

Below is the implementation of the above approach:

Python3

# List initialization
input = [987]

# Converting to string
input_str = str(input[0])

# Output list initialization
output = []

# Loop over characters of the string
for char in input_str:
    # Convert character to integer and append to output
    output.append(int(char))

# Printing output
print(output)

Output

[9, 8, 7]

Time complexity: O(n), where n is the number of digits in the input integer.
Auxiliary space: O(n), where n is the number of digits in the input integer. This is because we need to store the output list, which contains n integers.