isinstance checks for if/while

test/completion/isinstance.py

@@ -0,0 +1,19 @@
+if isinstance(i, str):
+    #? str()
+    i
+
+if isinstance(j, (str, int)):
+    #? str() int()
+    j
+
+while isinstance(k, (str, int)):
+    #? str() int()
+    k
+
+if not isinstance(k, (str, int)):
+    #? 
+    k
+
+while not isinstance(k, (str, int)):
+    #? 
+    k