>> He clearly wasn't fully master of the environment in which his
>> customers ran his software, so I think it's understandable that he
>> was caught by surprise by this change.
Fredrik> a programmer that's surprised that code that relies on
Fredrik> undocumented behaviour might behave differently if run on a
Fredrik> different platform ? *that's* surprising.
Not necessarily. He may not have realized his customers were going to
upgrade their operating systems or that the upgrades would involve a new
version of Python. Not everyone tracks every Python release. In this case,
a) Python 2.4 had been out long enough to turn up in a new (presumably
Linux) OS release, and b) since Mr. Black appears to program in Python for a
living he should probably have been more attentive to new releases.
Maybe Mr. Black hadn't gotten around to testing his software with 2.4 yet.
Maybe the software was written on-site for a client and he didn't have
access to it to even test in his own environment.
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