Exception¶

except vs except Exception¶

try:
    x = 1 / 0
except: # except Exception as exc:
    x = 0

We should never use a bare except!

https://docs.python.org/3.1/howto/doanddont.html \

Python has the `except:` clause, which catches all exceptions. 
Since every error in Python raises an exception, using `except:`
can make many programming errors look like runtime problems, which hinders the debugging process.

Because except: catches all exceptions, including SystemExit, KeyboardInterrupt, and GeneratorExit
(which is not an error and should not normally be caught by user code), using a bare except: is almost never a good idea.
In situations where you need to catch all “normal” errors, such as in a framework that runs callbacks,
you can catch the base class for all normal exceptions, Exception.

We should use the most specific exception possible and if we do want to catch all exceptions we should catch Exception which is the base class of all normal exceptions.

We should also capture the exception with as exc as it is very useful to have if we are in the debugger inside the except block.

exception hierarchy¶

https://docs.python.org/3.10/library/exceptions.html#exception-hierarchy