This is part of a series, see Iterables.
Python list comprehension is a shorthand for generating a list, from one or more iterables.
>>> old_list = ['apple', 'banana', 'coconut'] >>> [item for item in old_list if 'a' in item] ['apple', 'banana']
With a for loop you’d do it like so.
>>> new_list =  >>> for item in old_list: ... if 'a' in item: ... new_list.append(item) >>> new_list ['apple', 'banana']
When stored in a variable, note that the whole generated list is stored in memory after the comprehension executes.