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- """
- Checks that only valid values are used in a mapping context.
- """
- # pylint: disable=missing-docstring,invalid-name,too-few-public-methods,no-self-use,import-error,wrong-import-position
- from __future__ import print_function
-
-
- def test(**kwargs):
- print(kwargs)
-
-
- # dictionary value/comprehension
- dict_value = dict(a=1, b=2, c=3)
- dict_comp = {chr(x): x for x in range(256)}
- test(**dict_value)
- test(**dict_comp)
-
-
- # in order to be used in kwargs custom mapping class should define
- # __iter__(), __getitem__(key) and keys().
- class CustomMapping(object):
- def __init__(self):
- self.data = dict(a=1, b=2, c=3, d=4, e=5)
-
- def __getitem__(self, key):
- return self.data[key]
-
- def keys(self):
- return self.data.keys()
-
- test(**CustomMapping())
- test(**CustomMapping) # [not-a-mapping]
-
- class NotMapping(object):
- pass
-
- test(**NotMapping()) # [not-a-mapping]
-
- # skip checks if statement is inside mixin/base/abstract class
- class SomeMixin(object):
- kwargs = None
-
- def get_kwargs(self):
- return self.kwargs
-
- def run(self, **kwargs):
- print(kwargs)
-
- def dispatch(self):
- kws = self.get_kwargs()
- self.run(**kws)
-
- class AbstractThing(object):
- kwargs = None
-
- def get_kwargs(self):
- return self.kwargs
-
- def run(self, **kwargs):
- print(kwargs)
-
- def dispatch(self):
- kws = self.get_kwargs()
- self.run(**kws)
-
- class BaseThing(object):
- kwargs = None
-
- def get_kwargs(self):
- return self.kwargs
-
- def run(self, **kwargs):
- print(kwargs)
-
- def dispatch(self):
- kws = self.get_kwargs()
- self.run(**kws)
-
- # abstract class
- class Thing(object):
- def get_kwargs(self):
- raise NotImplementedError
-
- def run(self, **kwargs):
- print(kwargs)
-
- def dispatch(self):
- kwargs = self.get_kwargs()
- self.run(**kwargs)
-
- # skip uninferable instances
- from some_missing_module import Mapping
-
- class MyClass(Mapping):
- pass
-
- test(**MyClass())
-
-
- class HasDynamicGetattr(object):
-
- def __init__(self):
- self._obj = {}
-
- def __getattr__(self, attr):
- return getattr(self._obj, attr)
-
-
- test(**HasDynamicGetattr())
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