CODEWITHSUNDEEP
pythonfunctionlist-comprehension
Data Mastery
Data Mastery

Reputation: 2095

Filtering a list of strings by dynamic amounts of elements

I need to write a function that filters a list of strings by multiple conditions:

This would look this like this if I use one condition:

def get_newest(inputlist, filter_):
    small_list = [el for el in inputlist if filter_ in el]
    return small_list


smaller = get_newest(lines, "condition1")
smaller

However, the function has to be dynamic so the list comprehension would look like this for 2 arguments:

small_list = [el for el in inputlist if filter_ in el and filter_2 in el]

This is of course not dynamic.

Passing a list as a single argument results in an error:

TypeError: 'in <string>' requires string as left operand, not list

How can I do this?

Upvotes: 1

Views: 37

Answers (1)

timgeb
timgeb

Reputation: 78760

If I understand correctly, this is your function.

def get_newest(inputlist, filters):
    return [x for x in inputlist if all(f in x for f in filters)]

filters is an iterable of filters, e.g. ['substr1', 'substr2'].

Upvotes: 2

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