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Posts Tagged ‘exception handling’
Catch a specific IOError
March 30, 2012
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Problem
If you want to open a non-existing file, you get the following error message: “IOError: [Errno 2] No such file or directory:...
“. How to catch this specific IOError? For instance you want to notify the user that the file is missing instead of just saying “an I/O error occurred”.
Solution
Example:
def read_data_file(self): try: with open(self.data_file) as f: return json.load(f) except IOError, e: if e.errno == errno.ENOENT: print "Error: the given file doesn't exist." sys.exit(1)
Errno 2 == errno.ENOENT
.
This tip is from here.
Categories: python
errno, errno 2, error handling, exception handling, IOError, No such file or directory