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

class SampleClass(object):
    @cached_property
    def list_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:

$ pylint test
No config file found, using default configuration
************* Module test
C:  1, 0: Missing module docstring (missing-docstring)
C:  3, 0: Missing class docstring (missing-docstring)
C:  5, 4: Missing method docstring (missing-docstring)
R:  3, 0: Too few public methods (1/2) (too-few-public-methods)
C:  8, 0: Invalid constant name "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