configparser get non-existent boolean

I was surprised to find that in configparser, getboolean() does not 
raise KeyError for a non-existent config parameter.
Demo program (Python 3.11.5, Windows 11):

import configparser

config = configparser.ConfigParser()
config.read('ThisFileDoesNotExist.ini') # This line could be removed
MY_BOOL= config['DEFAULT'].getboolean('MY_BOOL') # This does NOT raise 
an Exception!
print(f"{MY_BOOL=}")
MY_STR = config['DEFAULT']['MY_STR'] # This does raise an Exception, 
naturally

The output:

MY_BOOL=None
Traceback (most recent call last):
   File "R:\Test.py", line 7, in <module>
     MY_STR = config['DEFAULT']['MY_STR']  # This does raise an 
Exception, naturally
              ~~~~~~~~~~~~~~~~~^^^^^^^^^^
   File "C:\Python313\Lib\configparser.py", line 1276, in __getitem__
     raise KeyError(key)
KeyError: 'MY_STR'

Is there a good reason for this?
Best wishes,
Rob Cliffe


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