Haoyu Bai <[EMAIL PROTECTED]> added the comment: I found the explanation of why buitl-ins are immutable:
For the curious: there are two reasons why changing built-in classes is disallowed. First, it would be too easy to break an invariant of a built-in type that is relied upon elsewhere, either by the standard library, or by the run-time code. Second, when Python is embedded in another application that creates multiple Python interpreters, the built-in class objects (being statically allocated data structures) are shared between all interpreters; thus, code running in one interpreter might wreak havoc on another interpreter, which is a no-no. (From http://www.python.org/download/releases/2.2.3/descrintro/) Is the statement still valid for current version of Python? _______________________________________ Python tracker <[EMAIL PROTECTED]> <http://bugs.python.org/issue3208> _______________________________________ _______________________________________________ Python-bugs-list mailing list Unsubscribe: http://mail.python.org/mailman/options/python-bugs-list/archive%40mail-archive.com
