Make sure that del_stmt as a name can be handled, see #313

jedi/api/completion.py

@@ -64,6 +64,11 @@ def filter_names(inference_state, completion_names, stack, like_name, fuzzy, cac
             k = (new.name, new.complete)  # key
             if k not in comp_dct:
                 comp_dct.add(k)
+                tree_name = name.tree_name
+                if tree_name is not None:
+                    definition = tree_name.get_definition()
+                    if definition is not None and definition.type == 'del_stmt':
+                        continue
                 yield new
 
 

jedi/inference/finder.py

@@ -20,7 +20,6 @@ from parso.python.tree import Name
 
 from jedi import settings
 from jedi.inference.arguments import TreeArguments
-from jedi.inference import helpers
 from jedi.inference.value import iterable
 from jedi.inference.base_value import NO_VALUES
 from jedi.parser_utils import is_scope
@@ -38,7 +37,17 @@ def filter_name(filters, name_or_str):
         if names:
             break
 
-    return list(names)
+    return list(_remove_del_stmt(names))
+
+
+def _remove_del_stmt(names):
+    # Catch del statements and remove them from results.
+    for name in names:
+        if name.tree_name is not None:
+            definition = name.tree_name.get_definition()
+            if definition is not None and definition.type == 'del_stmt':
+                continue
+        yield name
 
 
 def check_flow_information(value, flow, search_name, pos):

jedi/inference/syntax_tree.py

@@ -725,7 +725,9 @@ def tree_name_to_values(inference_state, context, tree_name):
         # the static analysis report.
         exceptions = context.infer_node(tree_name.get_previous_sibling().get_previous_sibling())
         types = exceptions.execute_with_values()
-    elif node.type == 'param':
+    elif typ == 'param':
+        types = NO_VALUES
+    elif typ == 'del_stmt':
         types = NO_VALUES
     else:
         raise ValueError("Should not happen. type: %s" % typ)

test/completion/basic.py

@@ -203,6 +203,19 @@ if r:
     #? int()
     r
 
+# -----------------
+# del
+# -----------------
+
+deleted_var = 3
+del deleted_var
+#? int()
+deleted_var
+#? ['deleted_var']
+deleted_var
+#! ['deleted_var = 3']
+deleted_var
+
 # -----------------
 # within docstrs
 # -----------------