E721: have the message better match the check

Author: asottile

pycodestyle.py

@@ -1456,19 +1456,24 @@ def comparison_negative(logical_line):
 
 @register_check
 def comparison_type(logical_line, noqa):
-    r"""Object type comparisons should always use isinstance().
+    r"""Object type comparisons should `is` / `is not` / `isinstance()`.
 
     Do not compare types directly.
 
     Okay: if isinstance(obj, int):
+    Okay: if type(obj) is int:
     E721: if type(obj) == type(1):
     """
     match = COMPARE_TYPE_REGEX.search(logical_line)
     if match and not noqa:
         inst = match.group(1)
         if inst and inst.isidentifier() and inst not in SINGLETONS:
             return  # Allow comparison for types which are not obvious
-        yield match.start(), "E721 do not compare types, use 'isinstance()'"
+        yield (
+            match.start(),
+            "E721 do not compare types, for exact checks use `is` / `is not`, "
+            "for instance checks use `isinstance()`",
+        )
 
 
 @register_check