无法在python列表理解的iter链中调用函数

Question

I am using the following iter chain, to generate a list -

from itertools import chain
from utils import my_func // custom function written that performs a function.
a = list(chain.from_iterable((u, my_func(u)) for u in MyCustomClass.objects.all()))

I expect that a list will be generated. But then, I get the error - NameError: global name 'my_func' is not defined

What am I doing wrong?

Answer 1

If you are using Django/iPython there is a bug with Django: iPython is started with a different namespace, which could explain your problem.

You can try to use a different shell (base python or bpython) or try to patch your Django installation. See this answer for more information.

Answer 2

尝试utils.func（），可能是该函数超出了当前范围