[Tutor] The Python way and two dimensional lists

[Dennis Lee Bieber]

On Mon, 22 Nov 2021 11:13:15 +1100, Phil <phillor9 at gmail.com> declaimed the
following:


>
>for s in set_list:
>     for r in col[0]: # instead of row:
>         if s.issubset(r):
>             pairs[tuple(sorted(s))] += 1
>
>Traceback (most recent call last):
>   File "/usr/lib/python3.9/idlelib/run.py", line 559, in runcode
>     exec(code, self.locals)
>   File "/home/phil/Python/set_count2.py", line 75, in <module>
>     if s.issubset(r):
>TypeError: 'int' object is not iterable

	Have you looked at the definition of .issubset()?

	The object one applies it to must be a set. The parameter passed must
be a superset (or equal). It returns true if the object -- in your example,
that would be	s	-- is a subset of the parameter		r	.

	But your r is not a set -- "for r in col[0]" is selecting the first
element of whatever col contains, which appears to be a single integer at
this point. I suspect you need to: 1) ensure that "r" is a SET, and
possible 2) reverse the call		r.issubset(s)



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	Wulfraed                 Dennis Lee Bieber         AF6VN
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