[Tutor] [HELP]how to test properties of a file

[Pierre Barbier de Reuille]

Tthe simplest, IMHO, is :

try:
   f = file(filename, "w")
   [...]
except IOError:
   print "The file is not writable"

Of course, not that this method empty the file if it is writable ! The 
best is to just put your IO code in such a try block ... That way, 
you're sure the file has the right mode.

If you don't want to open the file to detect its mode, then you need to 
use the os and stat modules together ...

Pierre

Shidai Liu a écrit :
> Dear all,
> 
> Here is a simple question. But I can't find a simple answer.
> How to test if a file is readable, executalbe or writable, especially, writable?
> 

-- 
Pierre Barbier de Reuille

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