Can elements of a list be split using list comprehension when it involves regex?-CodePudding

An example of using list comprehension to split elements of a list is here: How to split elements of a list?

myList = [i.split('\t')[0] for i in myList]

Can something like this be done using re.split if you want to split on regex? Simply substituting re.split for split in the above along with regex term yields attribution error:

AttributeError: 'str' object has no attribute 're'

So re is not being recognized as the regex library when used in this form of list comprehension. Can it be done?

CodePudding user response：

With i.split(), you're using a method of the string object itself. If you want to use a function from somewhere else, like re.split() you can't call it on the object itself - it doesn't know about it.

Instead:

import re 

myList = [re.split('\t', i)[0] for i in myList]

If you read the documentation on re.split, you'll notice that it requires you to pass the string to split as a parameter, instead of operating directly on it.