The catch block will hold the reference thrown from the try block and required messages are generated. For cases where the key was in the dictionary. Try / catch is what the c++ standard specifies for handling general c++ exceptions.
Once you enter the try/finally block, the code in the finally section is guaranteed to run, no matter what happens between try and finally. For the standard c++ code you write you should always use try / catch and not __try /. In python 3, try/except was 25 % faster than if key in d:
Instead of stopping the program, you can catch the exception and deal with it in your code. Try block will hold the statements which are going to raise exception. In python, is it possible to have multiple except statements for one try statement? It was much slower when the key wasn't in the dictionary, as expected, and.
@charlieparker you could try except baseexception as e: Try is used to execute code that might raise an exception that you're expecting. So, in the code above, the outer. Honestly, i've never found a need.