Refactor execute_operation a bit

test/completion/arrays.py

@@ -300,6 +300,17 @@ some_dct['b']
 #? int() float() str()
 some_dct['c']
 
+class Foo:
+    pass
+
+objects = {object(): 1, Foo: '', Foo(): 3.0}
+#? int() float() str()
+objects[Foo]
+#? int() float() str()
+objects[Foo()]
+#? int() float() str()
+objects['']
+
 # -----------------
 # with variable as index
 # -----------------

test/completion/precedence.py

@@ -56,6 +56,12 @@ a
 (3 ** 3)
 #? int() str()
 (3 ** 'a')
+#? int() str()
+(3 + 'a')
+#? bool()
+(3 == 'a')
+#? bool()
+(3 >= 'a')
 
 class X():
     foo = 2