如何为每个给定的键创建一个字典值？

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闭合 2年前。

Answer 1

您可以使用类似的内容

l = ['a','b','c']
d = {element:index for index,element in enumerate(l)}

，这些内容将为您提供映射到其索引的每个元素。

如果要设置一些任意价值，请使用

l = ['a','b','c']
d = {element:value for element in l}

Answer 2

创建此词典有很多方法。这只是几个：

>>> dc = dict(zip(ls, range(3))) 
>>> dc2 = {v: k for k, v in enumerate(ls)}
>>> dc2
{'a': 0, 'b': 1, 'c': 2}

>>> assert dc == dc2
>>>       # silence because they're same

Answer 3

l=['a','b','c']

d = dict(zip(l,range(len(l))))

print(d)  # {'a': 0, 'b': 1, 'c': 2}