# Python | Convert numeric string to integers in mixed list

Python Methods and Functions | String Variables

Method # 1: Using the comprehension list + `isdigit()`
This is one way to accomplish this task. In this we check for each element of the string if it is a number using isdigit and then convert to int if it is one. Iteration uses list comprehension.

 ` # Python3 code to demonstrate how it works ` ` # Convert string numbers to integers in a mixed list ` ` # using comprehension list + isdigit () `   ` # initialize the list ` ` test_list ` ` = ` ` [` ` "gfg" ` `, ` ` "1" ` `, ` ` "is" ` `, ` ` "6" ` `, ` ` "best" ` `] ` ` `  ` # print of the original list ` ` print ` ` (` ` "The original list: "` ` + ` ` str ` ` (test_list)) `   ` # Convert string numbers to integers in a mixed list ` ` # use comprehension list + isdigit () ` ` res ` ` = ` ` [` ` int ` ` (ele) ` ` if ` ` ele.isdigit () ` ` else ` ` ele ` ` for ` ` ele ` ` in ` ` test_list] `   ` # res print ultat ` ` print ` ` (` ` "List after converting string numbers to integers: "` ` + ` ` str ` ` (res)) `

Output:

` The original list: ['gfg',' 1', 'is',' 6', 'best'] List after converting string numbers to integers: [' gfg', 1, 'is', 6,' best'] `

Method # 2: Using ` map () + lambda + isdigit () `
This task can also be accomplished using the above functions. In this we are doing the iteration task using map () and a lambda function.

 ` # Python3 code to demonstrate how it works ` ` # Convert string numbers to integers in a mixed list ` ` # using map () + lambda + isdigit () `   ` # initialize list ` ` test_list ` ` = ` ` [` ` "gfg" ` `, ` ` "1" ` `, ` ` "is" ` `, ` ` "6" ` `, ` `" best "` `] ` ` `  # print the original list ` print ` ` (` ` "The original list:" ` ` + ` ` str ` ` (test_list)) `   ` # Convert string numbers to integers in a mixed list ` ` # using map () + lambda + isdigit () ` ` res ` ` = ` ` list ` ` (` ` map ` ` (` ` lambda ` ` ele: ` ` int ` ` (ele) ` ` if ` ` ele.isdigit () ` ` else ` ` ele, test_list)) `   ` # print result ` ` print ` ` (` ` "List after converting string numbers to integers: "` ` + ` ` str ` ` (res)) `

Output:

` The original list: ['gfg ',' 1', 'is',' 6', 'best'] List after converting string numbers to integers: [' gfg', 1, 'is', 6,' best'] `