[Python-Dev] PySequence_Check but no __len__

[Christian Tismer]

Hi friends,

there is a case in the Python API where I am not sure what to do:

If an object defines __getitem__() only but no __len__(),
then PySequence_Check() already is true and does not care.

So if I define no __len__, it simply fails. Is this intended?

I was mislead and thought this was the unlimited case, but
it seems still to be true that sequences are always finite.

Can someone please enlighten me?
-- 
Christian Tismer-Sperling    :^)   tismer at stackless.com
Software Consulting          :     http://www.stackless.com/
Karl-Liebknecht-Str. 121     :     http://pyside.org
14482 Potsdam                :     GPG key -> 0xE7301150FB7BEE0E
phone +49 173 24 18 776  fax +49 (30) 700143-0023

-------------- next part --------------
A non-text attachment was scrubbed...
Name: signature.asc
Type: application/pgp-signature
Size: 522 bytes
Desc: OpenPGP digital signature
URL: <http://mail.python.org/pipermail/python-dev/attachments/20180621/f9e05f26/attachment.sig>