searching index of tuple from list of tuples

Question

I have a list of tuples as follows:

tupleList = [('a','b'), ('c','d'), ('a','b'), ('a','b'), ('e','f')]

I want to find index of ('a','b') in tupleList.

I am trying the following:

idx = np.where(tupleList == ('a','b'))

but it gives an empty array.

Desired output would be

idx = [0, 2, 3]

Lists and tuples don't support the same operations as NumPy arrays; for example, `tupleList == ('a', 'b')` isn't an elementwise comparison. A list of tuples might not be the best data structure to work with. — user2357112, Mar 16 '17 at 20:12
Possible duplicate of [How to find all occurrences of an element in a list?](http://stackoverflow.com/questions/6294179/how-to-find-all-occurrences-of-an-element-in-a-list) — TemporalWolf, Mar 16 '17 at 20:14

score 3 · Accepted Answer · edited May 23 '17 at 10:30

3

[i for i, t in enumerate(tupleList) if t == ('a', 'b')]

yields

[0, 2, 3]

edited May 23 '17 at 10:30

Community

answered Mar 16 '17 at 20:12

TemporalWolf

1 Answers1