__import__() argument 1 must be string, not None

[jonathanslenders]

jedi.Interpreter('a(', column=2, line=1, path='', namespaces=[{'a': lambda:None}]).call_signatures()

This raises:

  File "/home/jonathan/env/mobilevikings/local/lib/python2.7/site-packages/jedi/api/__init__.py", line 574, in call_signatures
    self._pos, user_stmt)
  File "/home/jonathan/env/mobilevikings/local/lib/python2.7/site-packages/jedi/cache.py", line 90, in wrapper
    value = optional_callable()
  File "/home/jonathan/env/mobilevikings/local/lib/python2.7/site-packages/jedi/api/__init__.py", line 572, in <lambda>
    _callable = lambda: self._evaluator.eval_call(stmt_el)
  File "/home/jonathan/env/mobilevikings/local/lib/python2.7/site-packages/jedi/evaluate/__init__.py", line 226, in eval_call
    return self.eval_call_path(path, par, s.start_pos)
  File "/home/jonathan/env/mobilevikings/local/lib/python2.7/site-packages/jedi/evaluate/__init__.py", line 240, in eval_call_path
    search_global=True)
  File "/home/jonathan/env/mobilevikings/local/lib/python2.7/site-packages/jedi/evaluate/__init__.py", line 113, in find_types
    return f.find(scopes, resolve_decorator, search_global)
  File "/home/jonathan/env/mobilevikings/local/lib/python2.7/site-packages/jedi/debug.py", line 51, in wrapper
    result = func(*args, **kwargs)
  File "/home/jonathan/env/mobilevikings/local/lib/python2.7/site-packages/jedi/evaluate/finder.py", line 46, in find
    names = self.filter_name(scopes)
  File "/home/jonathan/env/mobilevikings/local/lib/python2.7/site-packages/jedi/evaluate/finder.py", line 89, in filter_name
    scope = name.parent.parent
  File "/home/jonathan/env/mobilevikings/local/lib/python2.7/site-packages/jedi/cache.py", line 139, in wrapper
    result = func(self)
  File "/home/jonathan/env/mobilevikings/local/lib/python2.7/site-packages/jedi/api/interpreter.py", line 69, in parent
    module = __import__(module_name)
TypeError: __import__() argument 1 must be string, not None

[davidhalter]

Latest Jedi commit:

>>> jedi.Interpreter('a(', column=2, line=1, path='', namespaces=[{'a': lambda:None}]).call_signatures()
[<CallSignature: function index 0>]