What other reasons could there be for the NoReverseMatch exception to occur?

Question

Django

What else could be the reasons for the exception

Exception Type: NoReverseMatch
Exception Value: Reverse for with arguments '()' and keyword arguments '{}' not found .

when doing redirect (someview)

if:
1. all urls in urls.py are valid
2. templates are valid
3. parameters passed in urls are valid?

Read the answer below.

The second question is how to avoid a similar situation in the future?

Answer 1

Do you import * more often

Answer 2

And immediately a lightning-fast answer:
view in redirect'e is defined twice.
For example, I have
../views/__init__.py:
from common import *
from something import *
so, I had someview in both common.py and something.py.
spent half a day looking for it.
I did not find it on the Internet.