Accessing dict_keys element by index in Python3

Question

I\'m trying to access a dict_key\'s element by its index:

test = {\'foo\': \'bar\', \'hello\': \'world\'}
keys = test.keys()  # dict_keys object

keys.index(         


        

Answer 1

Not a full answer but perhaps a useful hint. If it is really the first item you want*, then

next(iter(q))

is much faster than

list(q)[0]

for large dicts, since the whole thing doesn't have to be stored in memory.

For 10.000.000 items I found it to be almost 40.000 times faster.

*The first item in case of a dict being just a pseudo-random item before Python 3.6 (after that it's ordered in the standard implementation, although it's not advised to rely on it).