[Python-Dev] urllib exception compatibility (original) (raw)
Greg Ewing greg.ewing at canterbury.ac.nz
Fri Sep 28 03:30:58 CEST 2007
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Guido van Rossum wrote:
How about making IOError, OSError and EnvironmentError all aliases for the same thing? The distinction is really worthless historical baggage.
To my mind, the distinction is that IOError and OSError have an attribute for the error code, and the code found there has a well-defined meaning (C library error code and system call error code respectively), whereas EnvironmentError is more general.
While it might be possible to merge them all together on Unix-like systems, that wouldn't necessarily be true on all platforms -- the IOError and OSError codes might belong to different domains. Although I suppose you could have another attribute to distinguish them if necessary.
-- Greg Ewing, Computer Science Dept, +--------------------------------------+ University of Canterbury, | Carpe post meridiem! | Christchurch, New Zealand | (I'm not a morning person.) | greg.ewing at canterbury.ac.nz +--------------------------------------+
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