CODEWITHSUNDEEP
pythonpython-2.7
user3522379
user3522379

Reputation: 21

python to find sub string inside string

I am new to python and I have simple problem with code below the code supposed to give the result 'x100' while it is 'x10' and 'x100'.How to get the result as expected.

test_list=['x10','x50','x100']
text='this text has x100 only'
for i in test_list:
    if  text.find(i)!=-1:
        print "found "+i 
>>> 
found x10
found x100
>>>

Upvotes: 0

Views: 101

Answers (3)

Inbar Rose
Inbar Rose

Reputation: 43437

You can use this simple list-comprehension to find all instances. Bonus: it only calculates the split once.

def f(s, lst):
    return [item for item in lst if item in s.split()]

Test it:

>>> test_list=['x10','x50','x100']
>>> text='this text has x100 only'
>>> f(text, test_list)
['x100']

Upvotes: 0

Bhargav Rao
Bhargav Rao

Reputation: 52071

A simpler way would be

test_list=['x10','x50','x100']
text='this text has x100 only'
for i in test_list:
    if  i in text.split():
        print "found "+i

To detect 

test_list=['x10','x50','x100']
test_list= sorted(test_list,key = lambda x: len(x), reverse = True)
text='this text has x100n only'
import re
a = re.search("|".join(test_list),text)
if a:
    print "Found",a.group()

Upvotes: 1

fredtantini
fredtantini

Reputation: 16556

You could use .split() to find if it's in the list of word:

>>> test_list=['x10','x50','x100']
>>> text='this text has x100 only'
>>> for i in test_list:
...   if i in text.split():
...     print "found",i
...
found x100

Upvotes: 1

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