Traceback (most recent call last):


 "/usr/anaconda3/lib/python3.7/site-packages/astroid/__init__.py", line 91, in _inference_tip_cached

return iter(_cache[func, node])
KeyError: (<function register_builtin_transform.<locals>._transform_wrapper at 0x7fc41013fd08>, <Call l.1129 at 0x7fc3d0486668>)


Traceback (most recent call last):


 "/opt/conda/lib/python3.7/site-packages/pip/_vendor/resolvelib/resolvers.py", line 171, in _merge_into_criterion

crit = self.state.criteria[name]

KeyError: 'future'
