Question

Please let me know how to sort the list of String in either ascending / descending order without considering special characters and case.

ex:

list1=['test1_two','testOne','testTwo','test_one']

Applying the list.sort /sorted method results in sorted list

['test1_two', 'testOne', 'testTwo', 'test_one']

but the without considering the special characters and case it should be

['testOne','test_one', 'test1_two','testTwo'] OR 
['test_one','testOne','testTwo', 'test1_two' ]

list.sort /sorted method sorts based on the ascii value of the characters but Please let me knwo how do i achieve my expected one

Answer 1

If by special chars you mean “everything that is not letters”:

sorted(list1, key=lambda x: re.sub('[^A-Za-z]+', '', x).lower())