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Try ... else ... except for syntax error

I do not understand this...

This code cannot be run and I don't know why it is a syntax error.


    try:
        newT.read()
        #existingArtist = newT['Exif.Image.Artist'].value
        #existingKeywords = newT['Xmp.dc.subject'].value

    except KeyError:
        print "KeyError"

    else:
        #Program will NOT remove existing values
        newT.read()
        if existingArtist != "" :
            newT['Exif.Image.Artist'] = artistString


        print existingKeywords

        keywords = os.path.normpath(relativePath).split(os.sep)
        print keywords
        newT['Xmp.dc.subject'] = existingKeywords + keywords

        newT.write()
    except:
        print "Cannot write tags to ",filePath

A syntax error occurs with the last "except:". Again ... I have no idea why python is throwing a syntax error (spent ~ 3 hours on this issue).

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3 answers


else

There can be no other after except

. Blocks try

, except

and are else

not like function calls or other code - you can't just mix and match them as you see fit. This is always a certain sequence:

try:
    # execute some code
except:
    # if that code raises an error, go here
    # (this part is just regular code)
else:
    # if the "try" code did not raise an error, go here
    # (this part is also just regular code)

If you want to catch an error that occurs during a block else

, you need a different statement try

. For instance:



try:
    ...
except:
    ...
else:
    try:
        ...
    except:
        ...

FYI, same thing if you want to catch an error that occurs during a block except

- in which case, you need a different operator try

, like:

try:
    ...
except:
    try:
        ...
    except:
        ...
else:
    ...
+17


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Reading the documentation would give you this phrase:

The try ... except statement has an optional else clause which, if present, must follow all exceptions.



Move the else to the end of your handler.

+3


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looking at the python documentation: http://docs.python.org/reference/compound_stmts.html#the-try-statement It doesn't look like you can have multiple elses with try. Maybe in the end you meant finally?

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