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Convert comma-separated string to List of Integers in Python

January 28, 2023 / List, Python / By

This tutorial will discuss about unique ways to convert comma-separated string to list of integers in Python.

Table Of Contents

Quick Solution:

First split the string using a comma as a delimeter i.e.

strValue.split(',')

It will split the string into multiple strings by using a comma as a delimeter. It returns a sequence of substrings from the string. Then convert each substring to an integer, and create a list from these converted integers using List Comprehension.

Let’s see the complete example,

strValue = "11,24, 56, 23, 67, 80"

# Convert comma-separated string to List of Integers
listOfInts = [int(elem) for elem in strValue.split(',') ]

print(listOfInts)

Output

[11, 24, 56, 23, 67, 80]

It converted a comma-separated string to List of Integers.

Frequently Asked:

But this example will only work if list has digits, and comma characters. What if string has some non numeric characters? In that scenario, the above example will raise an error. To handle that scenarion, checkout the next example.

Better Solution

Split the string into a list of substrings using the split() function. Then select only those strings from the list which are numeric, and convert them to integers. Do, all this in a List Comprehension, and it will return a list of integers.

Let’s see the complete example,

strValue = "11,24, 56, 23, This, is, 67, a, 80"

#  Convert comma-separated string to List of Integers
listOfInts = [int(elem) for elem in strValue.split(',') if elem.strip().isnumeric()]

print(listOfInts)

Output

[11, 24, 56, 23, 67, 80]

Summary

We learned how to convert a comma-separated string to List of Integers in Python. Thanks.

Python List Methods

List MethodDescription
append(x)Add an item to the end of the list.
extend(iterable)Extend the list by appending all the items from the iterable.
insert(i, x)Insert an item at a given position i.
remove(x)Remove the first item from the list whose value is x.
pop([i])Remove the item at the given position in the list and return it.
index(x[, start[, end]])Return the first index at which a value occurs.
count(x)Return the number of times x appears in the list.
sort([key[, reverse]])Sort the items of the list in place.
reverse()Reverse the elements of the list in place.
clear()Remove all items from the list.
copy()Return a shallow copy of the list.

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Python List Methods

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