CODEWITHSUNDEEP
pythonstringlistsubstring
user1892697
user1892697

Reputation: 103

Search a list of strings with a list of substrings

I have a list of strings and currently I can search for one substring at the time:

str = ['abc', 'efg', 'xyz']   

[s for s in str if "a" in s]

which correctly returns 

['abc']

Now let's say I have a list of substrings instead: 

subs = ['a', 'ef']

I want a command like 

[s for s in str if anyof(subs) in s]

which should return 

['abc', 'efg']

Upvotes: 2

Views: 129

Answers (4)

njzk2
njzk2

Reputation: 39406

I still like map and filter, despite what is being said against and how comprehension can always replace a map and a filter. Hence, here is a map + filter + lambda version:

print filter(lambda x: any(map(x.__contains__,subs)), s)

which reads:

filter elements of s that contain any element from subs

I like how this uses words that carry a strong semantic meaning, rather than only if, for, in

Upvotes: 0

hjpotter92
hjpotter92

Reputation: 80657

Simply use them one after the other:

[s for s in str for r in subs if r in s]

>>> r = ['abc', 'efg', 'xyz']   
>>> s = ['a', 'ef']
>>> [t for t in r for x in s if x in t] 
['abc', 'efg']

Upvotes: 0

timgeb
timgeb

Reputation: 78780

>>> s = ['abc', 'efg', 'xyz']  
>>> subs = ['a', 'ef']
>>> [x for x in s if any(sub in x for sub in subs)]
['abc', 'efg']

Don't use str as a variable name, it's a builtin.

Upvotes: 2

Hoopdady
Hoopdady

Reputation: 2356

Gets a little convoluted but you could do

[s for s in str if any([sub for sub in subs if sub in s])]

Upvotes: 0

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