Patch# 1258 by Christian Heimes: kill basestring.
I like this because it makes the code shorter! :-)
diff --git a/Lib/warnings.py b/Lib/warnings.py
index ae17c7b..40079ba 100644
--- a/Lib/warnings.py
+++ b/Lib/warnings.py
@@ -150,10 +150,10 @@
import re
assert action in ("error", "ignore", "always", "default", "module",
"once"), "invalid action: %r" % (action,)
- assert isinstance(message, basestring), "message must be a string"
+ assert isinstance(message, str), "message must be a string"
assert isinstance(category, type), "category must be a class"
assert issubclass(category, Warning), "category must be a Warning subclass"
- assert isinstance(module, basestring), "module must be a string"
+ assert isinstance(module, str), "module must be a string"
assert isinstance(lineno, int) and lineno >= 0, \
"lineno must be an int >= 0"
item = (action, re.compile(message, re.I), category,