How To Avoid Pylint Not-an-iterable When Using A Custom Property Class

My code uses the commonly used cached_property class from werkzeug. Consider the following snippet: from werkzeug import cached_property class SampleClass(object): @cached_pro

Solution 1:

Looks like you are importing cached_property incorrectly. It lives in werkzeug.utils. pylint caught that error: E: 1, 0: No name 'cached_property' in module 'werkzeug' (no-name-in-module). Here's the fixed code:

from werkzeug.utils import cached_property

classSampleClass(object):
    @cached_propertydeflist_prop(self):
        return [1, 2]

sample = SampleClass()
for item in sample.list_prop:
    print item

When I run pylint after applying this fix, it stops complaining:

$pylinttestNoconfigfilefound,usingdefaultconfiguration*************ModuletestC:1,0:Missingmoduledocstring(missing-docstring)C:3,0:Missingclassdocstring(missing-docstring)C:5,4:Missingmethoddocstring(missing-docstring)R:3,0:Toofewpublicmethods(1/2)(too-few-public-methods)C:8,0:Invalidconstantname"sample"(invalid-name)

Solution 2:

I face the same problem when I use the Django+ pylint : the code is as follows:

queryset = A.objects.filter(col_a='a',col_b='b')

It will show error message:

Non-iterable value queryset is used in an iterating context (not-an-iterable)

My solution is as follows(+all()):

queryset = A.objects.filter(col_a='a',col_b='b').all()

It actually solved my problem, I know it seems has no much related to the issue but I google 'pylint + Non-iterable', this page will be on the top of search result, so I want to put the solution here,thanks