如果顺序很重要，则可以使用

If the order matters, then you can use collections.OrderedDict to collect all the items, like this

from collections import OrderedDict
print OrderedDict((d["key"], d) for d in my_list).values()

如果顺序无关紧要，您可以使用像这样的普通词典

And if the order doesn't matter, you can use a normal dictionary, like this

print {d["key"]:d for d in my_list}.values()