# 使用字典 ['键'] 获取字典中的元素

dic = {'a':123,'b':456,'c':789}

print(dic['a'])

#

print(dic['c'])

#

dic = {'a': 123, 'b': 456, 'c': 789}

dic['b'] = 14

print(dic)

# {'a': 123, 'b': 14, 'c': 789}

# 增加字典元素

dic = {'a':123,'b':456,'c':789}

dic['d'] = 555

print(dic)

# {'a': 123, 'b': 456, 'c': 789, 'd': 555}

dic = {'a': 123, 'b': 14, 'c': 789}

# 删除字典元素

del dic['b']

print(dic)

# {'a': 123, 'c': 789}

# 清空字典

dic = {'a': 123, 'b': 14, 'c': 789}

dic.clear()

print(dic)

# {}

# 删除字典

dic = {'a': 123, 'b': 14, 'c': 789}

del dic