seq = [(1, 2), (3, 4), (5, 6)] print(() in seq)
False? How can I check if there's a tuple, or even a generic sequence, inside a sequence? (With no specific values, as in this answer)
() is an empty tuple.
seq does not contain an empty tuple.
>>> seq = [(1, 2), (3, 4), (5, 6)] >>> any(isinstance(x, tuple) for x in seq) True
For a generic sequence you can use
>>> from collections import abc >>> any(isinstance(x, abc.Sequence) for x in seq) True
However, lots of objects are informally treated as sequences but neither implement the full protocol
abc.Sequence defines nor register as a virtual subclass of
Read this excellent answer for additional information.
You can find a question about detecting sequences here.