Scripting

5.15    Error Protection

When errors occur, like many modern programming languages, Python throws an exception. If your program does not provide protection against such exceptions, you’ll end up with a nasty error message. You can avoid this if you secure your code by using try/except.

5.15.1    try/except

The syntax for try/except is simple:

try:    # error prone codeexcept someError:    # response to a specific errorexcept:    # response to all other errorsfinally:    # is always executed 

Note that try must be followed by at least one except or finally block. All other parts of the try construct are optional. When an error occurs, Python looks for the first except statement that applies to the error. Using except without an error name is considered the ...