diff --git a/jedi/api/__init__.py b/jedi/api/__init__.py
index 1ba16531..66e3e9bc 100644
--- a/jedi/api/__init__.py
+++ b/jedi/api/__init__.py
@@ -15,7 +15,7 @@ from itertools import chain
 from jedi._compatibility import unicode, builtins
 from jedi.parser import Parser, load_grammar
 from jedi.parser.tokenize import source_tokens
-from jedi.parser import tree as pr
+from jedi.parser import tree
 from jedi.parser.user_context import UserContext, UserContextParser
 from jedi import debug
 from jedi import settings
@@ -159,13 +159,13 @@ class Script(object):
                     else:
                         return keywords.keyword_names('import')
 
-            if isinstance(user_stmt, pr.Import):
+            if isinstance(user_stmt, tree.Import):
                 module = self._parser.module()
                 completion_names += imports.completion_names(self._evaluator,
                                                              user_stmt, self._pos)
                 return completion_names
 
-            if names is None and not isinstance(user_stmt, pr.Import):
+            if names is None and not isinstance(user_stmt, tree.Import):
                 if not path and not dot:
                     # add keywords
                     completion_names += keywords.keyword_names(all=True)
@@ -210,7 +210,7 @@ class Script(object):
             if settings.case_insensitive_completion \
                     and n.lower().startswith(like.lower()) \
                     or n.startswith(like):
-                if isinstance(c.parent, (pr.Function, pr.Class)):
+                if isinstance(c.parent, (tree.Function, tree.Class)):
                     # TODO I think this is a hack. It should be an
                     #   er.Function/er.Class before that.
                     c = self._evaluator.wrap(c.parent).name
@@ -272,7 +272,7 @@ class Script(object):
             # matched to much.
             return []
 
-        if isinstance(user_stmt, pr.Import):
+        if isinstance(user_stmt, tree.Import):
             i, _ = helpers.get_on_import_stmt(self._evaluator, self._user_context,
                                               user_stmt, is_completion)
             if i is None:
@@ -392,7 +392,7 @@ class Script(object):
             """
             definitions = set(defs)
             for d in defs:
-                if isinstance(d.parent, pr.Import) \
+                if isinstance(d.parent, tree.Import) \
                         and d.start_pos == (0, 0):
                     i = imports.ImportWrapper(self._evaluator, d.parent).follow(is_goto=True)
                     definitions.remove(d)
@@ -417,7 +417,7 @@ class Script(object):
 
         if last_name is None:
             last_name = stmt
-            while not isinstance(last_name, pr.Name):
+            while not isinstance(last_name, tree.Name):
                 try:
                     last_name = last_name.children[-1]
                 except AttributeError:
@@ -428,7 +428,7 @@ class Script(object):
             # The cursor is on a class/function name.
             user_scope = self._parser.user_scope()
             definitions = set([user_scope.name])
-        elif isinstance(user_stmt, pr.Import):
+        elif isinstance(user_stmt, tree.Import):
             s, name = helpers.get_on_import_stmt(self._evaluator,
                                                  self._user_context, user_stmt)
 
@@ -450,8 +450,8 @@ class Script(object):
             # The Evaluator.goto function checks for definitions, but since we
             # use a reverse tokenizer, we have new name_part objects, so we
             # have to check the user_stmt here for positions.
-            if isinstance(user_stmt, pr.ExprStmt) \
-                    and isinstance(last_name.parent, pr.ExprStmt):
+            if isinstance(user_stmt, tree.ExprStmt) \
+                    and isinstance(last_name.parent, tree.ExprStmt):
                 for name in user_stmt.get_defined_names():
                     if name.start_pos <= self._pos <= name.end_pos:
                         return [name]
@@ -476,7 +476,7 @@ class Script(object):
         try:
             user_stmt = self._parser.user_stmt()
             definitions = self._goto(add_import_name=True)
-            if not definitions and isinstance(user_stmt, pr.Import):
+            if not definitions and isinstance(user_stmt, tree.Import):
                 # For not defined imports (goto doesn't find something, we take
                 # the name as a definition. This is enough, because every name
                 # points to it.
@@ -486,7 +486,7 @@ class Script(object):
                 # Without a definition for a name we cannot find references.
                 return []
 
-            if not isinstance(user_stmt, pr.Import):
+            if not isinstance(user_stmt, tree.Import):
                 # import case is looked at with add_import_name option
                 definitions = usages.usages_add_import_modules(self._evaluator,
                                                                definitions)
@@ -610,7 +610,7 @@ class Interpreter(Script):
     def _simple_complete(self, path, dot, like):
         user_stmt = self._parser.user_stmt_with_whitespace()
         is_simple_path = not path or re.search('^[\w][\w\d.]*$', path)
-        if isinstance(user_stmt, pr.Import) or not is_simple_path:
+        if isinstance(user_stmt, tree.Import) or not is_simple_path:
             return super(Interpreter, self)._simple_complete(path, dot, like)
         else:
             class NamespaceModule(object):
diff --git a/jedi/api/classes.py b/jedi/api/classes.py
index 88e456d8..a1d42bd0 100644
--- a/jedi/api/classes.py
+++ b/jedi/api/classes.py
@@ -10,7 +10,7 @@ import re
 from jedi._compatibility import unicode, use_metaclass
 from jedi import settings
 from jedi import common
-from jedi.parser import tree as pr
+from jedi.parser import tree
 from jedi.evaluate.cache import memoize_default, CachedMetaClass
 from jedi.evaluate import representation as er
 from jedi.evaluate import iterable
@@ -152,7 +152,7 @@ class BaseDefinition(object):
             return stripped.api_type()
         elif isinstance(stripped, iterable.Array):
             return 'instance'
-        elif isinstance(stripped, pr.Import):
+        elif isinstance(stripped, tree.Import):
             return 'import'
 
         string = type(stripped).__name__.lower().replace('wrapper', '')
@@ -166,7 +166,7 @@ class BaseDefinition(object):
         path = []
         par = self._definition
         while par is not None:
-            if isinstance(par, pr.Import):
+            if isinstance(par, tree.Import):
                 path += imports.ImportWrapper(self._evaluator, self._name).import_path
                 break
             try:
@@ -317,9 +317,9 @@ class BaseDefinition(object):
         """
         Follow both statements and imports, as far as possible.
         """
-        if self._definition.isinstance(pr.ExprStmt):
+        if self._definition.isinstance(tree.ExprStmt):
             return self._evaluator.eval_statement(self._definition)
-        elif self._definition.isinstance(pr.Import):
+        elif self._definition.isinstance(tree.Import):
             return imports.ImportWrapper(self._evaluator, self._name).follow()
         else:
             return [self._definition]
@@ -383,9 +383,9 @@ class Completion(BaseDefinition):
             append = '('
 
         if settings.add_dot_after_module:
-            if isinstance(self._definition, pr.Module):
+            if isinstance(self._definition, tree.Module):
                 append += '.'
-        if isinstance(self._definition, pr.Param):
+        if isinstance(self._definition, tree.Param):
             append += '='
 
         name = str(self._name)
@@ -443,7 +443,7 @@ class Completion(BaseDefinition):
             parses all libraries starting with ``a``.
         """
         definition = self._definition
-        if isinstance(definition, pr.Import):
+        if isinstance(definition, tree.Import):
             i = imports.ImportWrapper(self._evaluator, self._name)
             if len(i.import_path) > 1 or not fast:
                 followed = self._follow_statements_imports()
@@ -462,7 +462,7 @@ class Completion(BaseDefinition):
         The type of the completion objects. Follows imports. For a further
         description, look at :attr:`jedi.api.classes.BaseDefinition.type`.
         """
-        if isinstance(self._definition, pr.Import):
+        if isinstance(self._definition, tree.Import):
             i = imports.ImportWrapper(self._evaluator, self._name)
             if len(i.import_path) <= 1:
                 return 'module'
@@ -480,7 +480,7 @@ class Completion(BaseDefinition):
         # imports completion is very complicated and needs to be treated
         # separately in Completion.
         definition = self._definition
-        if definition.isinstance(pr.Import):
+        if definition.isinstance(tree.Import):
             i = imports.ImportWrapper(self._evaluator, self._name)
             return i.follow()
         return super(Completion, self)._follow_statements_imports()
@@ -546,14 +546,14 @@ class Definition(use_metaclass(CachedMetaClass, BaseDefinition)):
             d = typ + ' ' + d.name.get_code()
         elif isinstance(d, iterable.Array):
             d = 'class ' + d.type
-        elif isinstance(d, (pr.Class, er.Class, er.Instance)):
+        elif isinstance(d, (tree.Class, er.Class, er.Instance)):
             d = 'class ' + unicode(d.name)
-        elif isinstance(d, (er.Function, pr.Function)):
+        elif isinstance(d, (er.Function, tree.Function)):
             d = 'def ' + unicode(d.name)
-        elif isinstance(d, pr.Module):
+        elif isinstance(d, tree.Module):
             # only show module name
             d = 'module %s' % self.module_name
-        elif isinstance(d, pr.Param):
+        elif isinstance(d, tree.Param):
             d = d.get_code().strip()
             if d.endswith(','):
                 d = d[:-1]  # Remove the comma.
diff --git a/jedi/api/usages.py b/jedi/api/usages.py
index 64377eac..ecb88563 100644
--- a/jedi/api/usages.py
+++ b/jedi/api/usages.py
@@ -1,6 +1,6 @@
 from jedi._compatibility import unicode
 from jedi.api import classes
-from jedi.parser import tree as pr
+from jedi.parser import tree
 from jedi.evaluate import imports
 
 
@@ -43,7 +43,7 @@ def usages_add_import_modules(evaluator, definitions):
     new = set()
     for d in definitions:
         imp_or_stmt = d.get_definition()
-        if isinstance(imp_or_stmt, pr.Import):
+        if isinstance(imp_or_stmt, tree.Import):
             s = imports.ImportWrapper(evaluator, d)
             new |= set(s.follow(is_goto=True))
     return set(definitions) | new
diff --git a/jedi/parser/fast.py b/jedi/parser/fast.py
index 1ce704ad..35bb8555 100644
--- a/jedi/parser/fast.py
+++ b/jedi/parser/fast.py
@@ -9,7 +9,7 @@ from itertools import chain
 from jedi._compatibility import use_metaclass
 from jedi import settings
 from jedi.parser import Parser
-from jedi.parser import tree as pr
+from jedi.parser import tree
 from jedi import cache
 from jedi import debug
 from jedi.parser.tokenize import (source_tokens, NEWLINE,
@@ -18,7 +18,7 @@ from jedi.parser.tokenize import (source_tokens, NEWLINE,
 FLOWS = 'if', 'else', 'elif', 'while', 'with', 'try', 'except', 'finally', 'for'
 
 
-class FastModule(pr.Module):
+class FastModule(tree.Module):
     type = 'file_input'
 
     def __init__(self, module_path):
@@ -140,7 +140,7 @@ class ParserNode(object):
         middle.
         """
         c = self._content_scope.children
-        if pr.is_node(c[-1], 'suite'):  # In a simple_stmt there's no DEDENT.
+        if tree.is_node(c[-1], 'suite'):  # In a simple_stmt there's no DEDENT.
             end_marker = self.parser.module.children[-1]
             # Set the DEDENT prefix instead of the ENDMARKER.
             c[-1].children[-1].prefix = end_marker.prefix
@@ -236,7 +236,7 @@ class FastParser(use_metaclass(CachedFastParser)):
                                 '|'.join(_FLOWS_NEED_COLON)))
 
     def __init__(self, grammar, source, module_path=None):
-        # set values like `pr.Module`.
+        # set values like `tree.Module`.
         self._grammar = grammar
         self.module_path = module_path
         self._reset_caches()
diff --git a/jedi/parser/user_context.py b/jedi/parser/user_context.py
index 43250313..cad62499 100644
--- a/jedi/parser/user_context.py
+++ b/jedi/parser/user_context.py
@@ -7,7 +7,7 @@ from jedi import common
 from jedi.parser import tokenize, Parser
 from jedi._compatibility import u
 from jedi.parser.fast import FastParser
-from jedi.parser import tree as pr
+from jedi.parser import tree
 from jedi import debug
 from jedi.common import PushBackIterator
 
@@ -323,8 +323,8 @@ class UserContextParser(object):
             def scan(scope):
                 for s in scope.children:
                     if s.start_pos <= self._position <= s.end_pos:
-                        if isinstance(s, (pr.Scope, pr.Flow)):
-                                if isinstance(s, pr.Flow):
+                        if isinstance(s, (tree.Scope, tree.Flow)):
+                                if isinstance(s, tree.Flow):
                                     return s
                                 return scan(s) or s
                         elif s.type in ('suite', 'decorated'):