Typed Map

typedmap.py

class TypedMap:
    """ A class which implements a typed map.
    
    """
    def __init__(key_type, value_type):
      pass
    
    # Implement the methods required
    # for the functionality demonstrated
    # in the __main__ clause
  

if __name__ == '__main__':
    
    map = TypedMap(int, string)
    
    print(map[1])  # raises a KeyError
    
    map[1] = '42'
    
    print(map[1])  # prints 42
    
    map[1] = 42   # raises a TypeError
    
    map[2] = 'two'
    
    map[3] = 'three'
    
    map['cat'] = 'dog'  # raises a TypeError
    
    print(map)   # prints a string representation of the map
    
    for key in map:    # prints each key in the map
        print(key)
    
    print(len(map))    # prints the length of the map