When a module imports many names from sub-modules, and does not include any code except for those imports, the module is obviously intended to hold names. Those names should be put into `__all__`. e.g. the following causes pyflakes errors, as Foo and Bar are unused: ``` from a.b import Foo from a.c import Bar ``` To avoid this, ``` from a.b import Bar from a.c import Foo __all__ = ('Bar', 'Foo') ```