Find an element in a list of tuples

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Chapters
00:00 Question
00:25 Accepted answer (Score 307)
00:46 Answer 2 (Score 167)
01:07 Answer 3 (Score 27)
01:30 Answer 4 (Score 12)
01:39 Thank you

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Full question
https://stackoverflow.com/questions/2191...

Answer 2 links:
[List Comprehensions]: http://docs.python.org/tutorial/datastru...
[generator functions]: http://www.python.org/dev/peps/pep-0255/

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Tags
#python #list #search #tuples

#avk47

ACCEPTED ANSWER

If you just want the first number to match you can do it like this:

[item for item in a if item[0] == 1]

If you are just searching for tuples with 1 in them:

[item for item in a if 1 in item]

[ (x,y) for x, y in a if x  == 1 ]

Also read up up generator functions and the yield statement.

def filter_value( someList, value ):
    for x, y in someList:
        if x == value :
            yield x,y

result= list( filter_value( a, 1 ) )

[tup for tup in a if tup[0] == 1]

for item in a:
   if 1 in item:
       print item