python学习（二十六） 字典
# 访问字典
car = {'make':'bmw', 'model':'550i', 'year':2016}
print(car)
print(car['make'])
# 添加元素
d = {}
d['one'] = 1
print(d)
# 嵌套字典
d = {'k1' : {'nestk1': 'nestvalue1', 'nestk2':'nestvalue2'}, 'fds':3}
print(d)
print(d['k1']['nestk1']) # 访问嵌套元素
# 字典的keys, values, items
car = {'make':'bmw', 'model':'550i', 'year':2016}
print(car.keys())
print(car.values())
print(car.items())
# 字典拷贝
car_copy = car.copy()
print(car_copy)
result: