Fix wrong imports

- "from _compatibility import ..." (not in circular imports)
- "from jedi import builtin" (one of circular imports)
- "api_classes = api.api_classes"
  ("from jedi import api_classes" is not supported)

jedi/evaluate.py

@@ -68,11 +68,11 @@ backtracking algorithm.
 
 .. todo:: nonlocal statement, needed or can be ignored? (py3k)
 """
-from _compatibility import next, hasattr, is_py3k, unicode, reraise
 
 import sys
 import itertools
 
+from jedi._compatibility import next, hasattr, is_py3k, unicode, reraise
 from jedi import common
 from jedi import cache
 from jedi import parsing_representation as pr

jedi/evaluate_representation.py

@@ -12,7 +12,7 @@ they change classes in Python 3.
 import copy
 import itertools
 
-from _compatibility import property, use_metaclass, next, hasattr
+from jedi._compatibility import property, use_metaclass, next, hasattr
 from jedi import parsing_representation as pr
 from jedi import cache
 from jedi import helpers

jedi/keywords.py

@@ -2,7 +2,7 @@ import pydoc
 import keyword
 
 from jedi._compatibility import is_py3k
-from jedi import builtin
+import builtin
 
 try:
     from pydoc_data import topics as pydoc_topics

jedi/modules.py

@@ -15,13 +15,12 @@ Apart from those classes there's a ``sys.path`` fetching function, as well as
 """
 from __future__ import with_statement
 
-from _compatibility import exec_function, unicode, is_py25, literal_eval
-
 import re
 import tokenize
 import sys
 import os
 
+from jedi._compatibility import exec_function, unicode, is_py25, literal_eval
 from jedi import cache
 from jedi import parsing
 from jedi import parsing_representation as pr

jedi/parsing.py

@@ -15,11 +15,11 @@ within the statement. This lowers memory usage and cpu time and reduces the
 complexity of the ``Parser`` (there's another parser sitting inside
 ``Statement``, which produces ``Array`` and ``Call``).
 """
-from _compatibility import next, StringIO
 
 import tokenize
 import keyword
 
+from jedi._compatibility import next, StringIO
 from jedi import debug
 from jedi import common
 from jedi import parsing_representation as pr

test/test_regression.py

@@ -18,7 +18,7 @@ from .base import TestBase, unittest, cwd_at
 import jedi
 from jedi._compatibility import is_py25, utf8, unicode
 from jedi import api
-from jedi import api_classes
+api_classes = api.api_classes
 
 #jedi.set_debug_function(jedi.debug.print_to_stdout)