如何在一次通过中检查多个键是否在字典中? [英] How do I check that multiple keys are in a dict in a single pass?

问题描述

我想做类似的事情:

foo = {'foo':1,'zip':2,'zam':3,'bar':4}

if ("foo","bar") in foo:
    #do stuff

如何检查dict foo中是否同时包含"foo"和"bar"?

How do I check whether both 'foo' and 'bar' are in dict foo?

推荐答案

好，您可以这样做:

>>> if all (k in foo for k in ("foo","bar")):
...     print "They're there!"
...
They're there!

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