python itertools combinations disappear

Question

When I do:

from itertools import combinations
a = combinations ('pdejffd', 2)
print(list(a))
print(list(a))

the second print outputs [].

Can someone explain me why?

Does this answer your question? [Why can't I iterate twice over the same data?](https://stackoverflow.com/questions/25336726/why-cant-i-iterate-twice-over-the-same-data) You should do `a = list(combinations('pdejffd', 2))` instead — Tomerikoo, Oct 27 '20 at 15:21

score 1 · Accepted Answer · answered Oct 27 '20 at 15:21

1

You've already used it up in the first list(a) call.

answered Oct 27 '20 at 15:21

Alexander

Is it possible to save it instead of burning it? – Bernardo Cortez Oct 27 '20 at 15:23
1

@BernardoCortez Yep, that's exactly what you did with `list(a)`. But you threw away the result. – Alexander Oct 27 '20 at 15:48

1 Answers1