We can implement abstract interfaces (sequence, mapping, number) in
Python with the appropriate __special__ methods, but i don't see an
easy way to test if something supports one of these abstract interfaces
in Python.
At the moment, to see if something is a sequence i believe i have to
say something like
try:
x[0]
except:
# not a sequence
else:
# okay, it's a sequence
or
if hasattr(x, '__getitem__') or type(x) in [type(()), type([])]:
...
Is there, or should there be, a better way to do this?
-- ?!ng
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