filter list by condition using python

Question

def myFunction(cond_list, input_list):
    res = []
    data = list(set(input_list))  # filter duplicate elements
    for i in cond_list:
        for j in data:
            if i in j:
                res.append(i)
    return res

cond = ['cat', 'rabbit']  
input_list = ['', 'cat 88.96%', '.', 'I have a dog', '', 'rabbit 12.44%', '', 'I like tiger']
result = myFunction(cond_list=cond, input_list=input_list)
print(result)  # the input list have: ['cat', 'rabbit']

I have a function. Is there any better way to modify my function according to the conditions?

What do you want your function to do? Can you share some sample inputs and outputs ? — Devesh Kumar Singh
– Devesh Kumar Singh, Commented Apr 29, 2019 at 8:54
@DeveshKumarSingh no,get the string I setting --> ['cat', 'rabbit'] — vincentlai
– vincentlai, Commented Apr 29, 2019 at 9:02
So if your input and output are same? What is the function doing? — Devesh Kumar Singh
– Devesh Kumar Singh, Commented Apr 29, 2019 at 9:03

George · Accepted Answer · 2019-04-29 08:57:30Z

1

If I understand you correctly, is this what you are looking for?

cond = ['cat', 'rabbit']  # filter duplicate elements
input_list = ['', 'cat 88.96%', '.', 'dog 40.12%', '', 'rabbit 12.44%', '', 'tiger 85.44%']
[i for i in cond for j in input_list if i in j]

['cat', 'rabbit']

answered Apr 29, 2019 at 8:57

George

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Comments

snakecharmerb · Accepted Answer · 2019-04-29 09:11:15Z

1

You can use itertools.product to generate the pairs for comparison:

>>> product = itertools.product(cond, input_list)
>>> [p for (p, q) in product if p in q]
['cat', 'rabbit']

answered Apr 29, 2019 at 9:11

snakecharmerb

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Comments

Hasan Jafarov · Accepted Answer · 2019-04-29 09:00:21Z

0

cond = ['cat', 'rabbit']  # filter duplicate elements
input_list = ['', 'cat 88.96%', '.', 'dog 40.12%', '', 'rabbit 12.44%', '', 'tiger 
85.44%']
matching = list(set([s for s in input_list if any(xs in s for xs in cond)]))

for i in matching: 
   print(i)

answered Apr 29, 2019 at 9:00

Hasan Jafarov

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Rakesh · Accepted Answer · 2019-04-29 09:02:10Z

0

This is one approach using regex and a list comprehension

Ex:

import re

def myFunction(cond_list, input_list):
    data = set(input_list)  # filter repeat element
    pattern = re.compile("|".join(data))
    return [i for i in cond_list if pattern.search(i)]

cond = ['cat', 'rabbit']  # filter duplicate elements
input_list = ['', 'cat 88.96%', '.', 'dog 40.12%', '', 'rabbit 12.44%', '', 'tiger 85.44%']
result = myFunction(cond_list=cond, input_list=input_list)
print(result)

Output:

['cat', 'rabbit']

answered Apr 29, 2019 at 9:02

Rakesh

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