python - 更改字典的所有值

Question

如何将字典中的所有值乘以一个集合数？

dictionary = {'one': 1, 'two': 2, 'three': 3}
number = 2

我想将 dictionary 中的所有值乘以 number 以便创建第二个名为 dictionary2 的字典

创建的字典应该是这样的:

dictionary2 = {'one': 2, 'two': 4 'three': 6} 

Answer 1

使用字典理解

>>> dictionary = {'one': 1, 'two': 2, 'three': 3}
>>> number = 2
>>> {key:value*number for key,value in dictionary.items()}
{'one': 2, 'three': 6, 'two': 4}

(注意顺序和字典本身是无序的不一样)

作为声明

dictionary2 = {key:value*number for key,value in dictionary.items()}

如果你想要一个简单的版本，你可以使用 for 循环

dictionary = {'one': 1, 'two': 2, 'three': 3}
number = 2
dictionary2 = {}

for i in dictionary:
    dictionary2[i] = dictionary[i]*number

print(dictionary2)