RE: configparser get non-existent boolean

Rob Cliffe wrote:
> I was surprised to find that in configparser, getboolean() does not raise KeyError for a non-existent config parameter.
> Is there a good reason for this?

History and backwards compatibility.  The configparser module has some years on it.

The rationale for this sort of thing is this: It's a common enough case for a file
to not contain a key that writing a try/expect can be seen as too cumbersome compared to 
an "is None" test.

Reasonable people may disagree, preferring a KeyError if no fallback is
provided, but it's too late to change now.

regards, Anders