Re: Awsome Python - chained exceptions

[Serhiy Storchaka]

On 14.02.13 08:39, Steven D'Aprano wrote:

Here is one example of using raise to re-raise an exception you have just
caught:

import errno
paths = ["here", "there", "somewhere else"]
for location in paths:
     filename = os.path.join(location, "prefs.ini")
     try:
         f = open(filename)
     except IOError as e:
         if e.errno != errno.ENOENT:  # File not found.
             raise

In Python 3.3:

    try:
        f = open(filename)
    except FileNotFound:
        pass

But not all errnos have special OSError subclasses.


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