Syntax to catch specific exceptions ?
Joonas Paalasmaa
joonas at olen.to
Sun Mar 10 17:21:13 EST 2002
Pekka Niiranen wrote:
>
> I am trying to find correct python syntax and structure for the
> following exceptions
> ------------------------
> mypath = os.path.join(os.getcwd(), 'mydirectory', 'mysettings.pxp')
> try:
> f = open(mypath, "r")
>
> except "mydirectory does not exists":
> try:
> create_mydirectory_for_the_next_read()
> save_default_values(mypath)
> except "no permission to create mydirectory":
> do_whatever()
>
> except "no permission to enter mydirectory":
> print "whatever1"
> use_defaults()
>
> except "file mysettings.pxp does not exist":
> print "whatever2"
> use_defaults()
>
> except "no permission to open mysettings.pxp":
> print "whatever3"
> use_defaults()
>
> -------------------------
>
> I can get the error text and number as follows, but how to catch only
> "File exists" OSError ?
>
> try:
> ... os.mkdir('e:\\tmp')
> except OSError, (errno, strerror):
> ... print strerror
> ...
> File exists
How about catching all exceptions and then examining the traceback?
- Joonas
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