[Python-Dev] UserString

Andrew McNamara andrewm at object-craft.com.au
Wed Feb 23 01:14:45 CET 2005

>>     if e.errno <> errno.EEXIST:
>>         raise
>You have a lot more faith in the errno module than I do. Are you sure
>the same error codes work on all platforms where Python works? It's
>also not exactly readable (except for old Unix hacks).

On the other hand, LBYL in this context can result in race conditions
and security vulnerabilities. "os.makedirs" is already a composite of
many system calls, so all bets are off anyway, but for simpler operations
that result in an atomic system call, this is important.

Andrew McNamara, Senior Developer, Object Craft

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