More Flow cleanups.

jedi/evaluate/flow_analysis.py

@@ -1,3 +1,4 @@
+from jedi.parser_utils import get_flow_branch_keyword
 class Status(object):
     lookup_table = {}
 
@@ -46,8 +47,8 @@ def reachability_check(context, context_scope, node, origin_scope=None):
         branch_matches = True
         for flow_scope in origin_flow_scopes:
             if flow_scope in node_flow_scopes:
-                node_keyword = flow_scope.get_branch_keyword(node)
-                origin_keyword = flow_scope.get_branch_keyword(origin_scope)
+                node_keyword = get_flow_branch_keyword(flow_scope, node)
+                origin_keyword = get_flow_branch_keyword(flow_scope, origin_scope)
                 branch_matches = node_keyword == origin_keyword
                 if flow_scope.type == 'if_stmt':
                     if not branch_matches:
@@ -76,8 +77,8 @@ def reachability_check(context, context_scope, node, origin_scope=None):
 def _break_check(context, context_scope, flow_scope, node):
     reachable = REACHABLE
     if flow_scope.type == 'if_stmt':
-        if flow_scope.node_after_else(node):
-            for check_node in flow_scope.check_nodes():
+        if flow_scope.is_node_after_else(node):
+            for check_node in flow_scope.get_check_nodes():
                 reachable = _check_if(context, check_node)
                 if reachable in (REACHABLE, UNSURE):
                     break

jedi/parser/python/tree.py

@@ -672,30 +672,13 @@ class Lambda(Function):
 
 class Flow(PythonBaseNode):
     __slots__ = ()
-    FLOW_KEYWORDS = (
-        'try', 'except', 'finally', 'else', 'if', 'elif', 'with', 'for', 'while'
-    )
-
-    def get_branch_keyword(self, node):
-        start_pos = node.start_pos
-        if not (self.start_pos < start_pos <= self.end_pos):
-            raise ValueError('The node is not part of the flow.')
-
-        keyword = None
-        for i, child in enumerate(self.children):
-            if start_pos < child.start_pos:
-                return keyword
-            first_leaf = child.get_first_leaf()
-            if first_leaf in self.FLOW_KEYWORDS:
-                keyword = first_leaf
-        return 0
 
 
 class IfStmt(Flow):
     type = 'if_stmt'
     __slots__ = ()
 
-    def check_nodes(self):
+    def get_check_nodes(self):
         """
         Returns all the `test` nodes that are defined as x, here:
 
@@ -715,7 +698,7 @@ class IfStmt(Flow):
         suite return None.
         """
         start_pos = node.start_pos
-        for check_node in reversed(list(self.check_nodes())):
+        for check_node in reversed(list(self.get_check_nodes())):
             if check_node.start_pos < start_pos:
                 if start_pos < check_node.end_pos:
                     return None
@@ -724,7 +707,7 @@ class IfStmt(Flow):
                 else:
                     return check_node
 
-    def node_after_else(self, node):
+    def is_node_after_else(self, node):
         """
         Checks if a node is defined after `else`.
         """

jedi/parser_utils.py

@@ -6,10 +6,9 @@ _EXECUTE_NODES = set([
     'shift_expr', 'arith_expr', 'atom_expr', 'term', 'factor', 'power', 'atom'
 ])
 
-return_ = 'import_name', 'import_from'
-
-
-# last added: Flow, KeywordStatement
+_FLOW_KEYWORDS = (
+    'try', 'except', 'finally', 'else', 'if', 'elif', 'with', 'for', 'while'
+)
 
 
 def get_executable_nodes(node, last_added=False):
@@ -68,3 +67,18 @@ def for_stmt_defines_one_name(for_stmt):
     :returns: bool
     """
     return for_stmt.children[1].type == 'name'
+
+
+def get_flow_branch_keyword(flow_node, node):
+    start_pos = node.start_pos
+    if not (flow_node.start_pos < start_pos <= flow_node.end_pos):
+        raise ValueError('The node is not part of the flow.')
+
+    keyword = None
+    for i, child in enumerate(flow_node.children):
+        if start_pos < child.start_pos:
+            return keyword
+        first_leaf = child.get_first_leaf()
+        if first_leaf in _FLOW_KEYWORDS:
+            keyword = first_leaf
+    return 0