Can someone help me work this out on (Python 3.9.6) please? This works fine:
class Y:
a = 'aaa'
c = tuple(x+x for x in a)
This gives an exception:
class Z:
a = 'aaa'
b = 'bbb'
c = tuple(x+y for x in a for y in b)
Traceback (most recent call last):
File "<pyshell#36>", line 1, in <module>
class Z:
File "<pyshell#36>", line 4, in Z
c = tuple(x+y for x in a for y in b)
File "<pyshell#36>", line 4, in <genexpr>
c = tuple(x+y for x in a for y in b)
NameError: name 'b' is not defined
