Add only numeric values present in a list in Python

We have a Python list which contains both string and numbers. In this article we will see how to sum up the numbers present in such list by ignoring the strings.

With filter and isinstance

The isinstance function can be used to filter out only the numbers from the elements in the list. Then we apply and the sum function and get the final result.

Example

 Live Demo

listA = [1,14,'Mon','Tue',23,'Wed',14,-4]
#Given dlist
print("Given list: ",listA)
# Add the numeric values
res = sum(filter(lambda i: isinstance(i, int), listA))
print ("Sum of numbers in listA: ", res)

Output

Running the above code gives us the following result −

Given list: [1, 14, 'Mon', 'Tue', 23, 'Wed', 14, -4]
Sum of numbers in listA: 48

With for loop

It is a similar approach as a wall except that we don't use filter rather we use the follow and the is instance condition. Then apply the sum function.

Example

 Live Demo

listA = [1,14,'Mon','Tue',23,'Wed',14,-4]
#Given dlist
print("Given list: ",listA)
# Add the numeric values
res = sum([x for x in listA if isinstance(x, int)])
print ("Sum of numbers in listA: ", res)

Output

Running the above code gives us the following result −

Given list: [1, 14, 'Mon', 'Tue', 23, 'Wed', 14, -4]
Sum of numbers in listA: 48

Pradeep Elance

Published on 09-Jul-2020 12:38:30

• Related Questions & Answers
• How to select only non - numeric values from varchar column in MySQL?
• How to set only numeric values for edittext in Android using Kotlin?
• MongoDB query to add timestamp only if it is not present
• List out the default values of numeric and non-numeric primitive data types in Java?
• How to check if a unicode string contains only numeric characters in Python?
• Array — Efficient arrays of numeric values in Python
• Fill missing numeric values in a JavaScript array
• Python Pandas - Display unique values present in each column
• How to add integer values to a C# list?
• How to add string values to a C# list?
• How to select only numeric strings in MongoDB?
• Python - Joining only adjacent words in list
• Program to count number of ways we can make a list of values by splitting numeric string in Python
• Add similar value multiple times in a Python list
• Get unique values from a list in Python