如何在一次通过中检查多个键是否在字典中？

Question

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foo和是否都bar在dict中foo？

Answer 1

好吧，你可以这样做：

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