CODEWITHSUNDEEP
pythonstringsubstring
lilipunk
lilipunk

Reputation: 183

Partial String match between two lists in python

I have two lists, one of which has substrings of the other list. I want to pull all rows from List B which have matching substrings in list A.

For example, List A:

Sally Hope
Bob John
Seth Whale

List B

[('Sally Hope does not like chocolate', 14)
('Sally Hope is great', 45)
('Seth Whale likes swimming', 43)
('Marley does not like walks', 56)
('John goes on walks', 55)]

Output:

[('Sally Hope does not like chocolate', 14)
('Sally Hope is great', 45)
('Seth Whale likes swimming', 43)]

I've tried this in R with amatch and dpylr filter but did not get the desired output and R fails me on memory (list B has ~2m rows). What is the most efficient way to do this in python?

Upvotes: 2

Views: 5354

Answers (1)

Rahul K P
Rahul K P

Reputation: 16081

Python have list comprehension,

output = [j for i in list_a for j in list_b if i in j[0]]

Result 

[('Sally Hope does not like chocolate', 14),
 ('Sally Hope is great', 45),
 ('Seth Whale likes swimming', 43)]

Upvotes: 1

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