python dictionary consection 在python中，词典综合提供了一种生成新词典的简洁方法。尽管它们与列表综合相似，但存在一些显着差异。

与问题所暗示的不同，您无法为钥匙创建字典理解。您必须明确指定键和值。 For example:

d = {n: n**2 for n in range(5)}

This creates a dictionary with keys from 0 to 4 and values equal to the square of the corresponding key.

Setting a Single Value for Multiple Keys

To set the same value for multiple keys, you can use the following syntax:

d = {n: n**2 for n in range(5)}

d = {n: True for n in range(5)}

This creates a dictionary with keys from 0 to 4, all with the value True.

Setting Multiple Values for Multiple Keys

As the question points out, it is not possible to specify multiple values for the使用字典理解的相同键。为了实现这一目标，您可以使用循环手动分配值或创建单独的词典，然后使用update（）更新现有的词典：

d = {n: True for n in range(5)}