code: def get_caselessly(dictionary, sought):
      
      try:
          return dictionary[sought]
      except KeyError:
          caseless_keys = {k.lower(): k for k in dictionary.keys()}
          real_key = caseless_keys[sought.lower()]  # allow any KeyError here
          return dictionary[real_key]
docs: Find the sought key in the given dictionary regardless of case
  
      >>> things = {'Fred' : 9}
      >>> print(get_caselessly(things, 'fred'))
      9