input: def explain_difference(data_type1: str, data_type2: str) -> str:
      """
      Given two data types in Python, 'list' and 'tuple', explain the main difference between them.
      >>> explain_difference('list', 'tuple')
      'The difference between a list and a tuple in Python is that a list is mutable, meaning its contents can be changed, while a tuple is immutable, meaning its contents cannot be changed. A list has square brackets around it, while a tuple has parentheses around it. Lists are used when the data needs to be changed, while tuples are used when the data is fixed and cannot be changed.'
      """
output:     if data_type1 == 'list' and data_type2 == 'tuple':
          return "The difference between a list and a tuple in Python is that a list is mutable, meaning its contents can be changed, while a tuple is immutable, meaning its contents cannot be changed. A list has square brackets around it, while a tuple has parentheses around it. Lists are used when the data needs to be changed, while tuples are used when the data is fixed and cannot be changed."
      else:
          return "Invalid data types provided. Please provide 'list' and 'tuple' as arguments."