input: Write a python function to create an empty dictionary with keys provided in a comma-separated string.
  assert EmptyDictionary("a,b,c").get_dictionary() == {'a': None, 'b': None, 'c': None}
  assert EmptyDictionary("key1, key2, key3").get_dictionary() == {'key1': None, 'key2': None, 'key3': None}
  assert EmptyDictionary("apple, banana, cherry").get_dictionary() == {'apple': None, 'banana': None, 'cherry': None}
output: def EmptyDictionary(keys):
      class DictWrapper:
          def __init__(self, keys):
              self.dictionary = {key.strip(): None for key in keys.split(',')}
          
          def get_dictionary(self):
              return self.dictionary
              
      return DictWrapper(keys)