Convert list of string into sorted list of integer in Python

Analysing data using python can bring us scenario when we have to deal with numbers represented as strings. In this article we will take a list which has numbers present as strings and we need to convert then to integers and then represent them in a sorted manner.

With map and sorted

In this approach we apply the int function to every element of the list using map. Then we apply the sorted function to the list which sorts the numbers. It can handle negative numbers also.

Example

 Live Demo

listA = ['54', '21', '-10', '92', '5']
# Given lists
print("Given list : \n", listA)
# Use mapp
listint = map(int, listA)
# Apply sort
res = sorted(listint)
# Result
print("Sorted list of integers: \n",res)

Output

Running the above code gives us the following result −

Given list :
['54', '21', '-10', '92', '5']
Sorted list of integers:
[-10, 5, 21, 54, 92]

With int and sort

In this approach we apply the int function by using a for loop and store the result into a list. Then the sort function is applied to the list. The final result shows the sorted list.

Example

 Live Demo

listA = ['54', '21', '-10', '92', '5']
# Given lists
print("Given list : \n", listA)
# Convert to int
res = [int(x) for x in listA]
# Apply sort
res.sort()
# Result
print("Sorted list of integers: \n",res)

Output

Running the above code gives us the following result −

Given list :
['54', '21', '-10', '92', '5']
Sorted list of integers:
[-10, 5, 21, 54, 92]

With sorted and int

This approach is similar to above except that we apply int function through a for loop and enclose the result in the sorted function. It is a single expression which gives us the final result.

Example

 Live Demo

listA = ['54', '21', '-10', '92', '5']
# Given lists
print("Given list : \n", listA)
# Convert to int
res = sorted(int(x) for x in listA)
# Result
print("Sorted list of integers: \n",res)

Output

Running the above code gives us the following result −

Given list :
['54', '21', '-10', '92', '5']
Sorted list of integers:
[-10, 5, 21, 54, 92]

Pradeep Elance

Updated on 20-May-2020 10:55:48

• Related Questions & Answers
• Convert a string representation of list into list in Python
• Convert list into list of lists in Python
• Convert list of tuples into list in Python
• Python - Convert list of string to list of list
• Convert list of string to list of list in Python
• Program to convert List of Integer to List of String in Java
• Program to convert List of String to List of Integer in Java
• Convert a list of multiple integers into a single integer in Python
• Convert list of tuples into digits in Python
• Convert list of numerical string to list of Integers in Python
• Python - Convert given list into nested list
• Python program to convert a list of characters into a string
• Convert list of tuples to list of list in Python
• Convert a list into tuple of lists in Python
• How to convert string representation of list to list in Python?