如果你想知道两个字典中都匹配多少个值，你应该说:)
也许是这样的：
shared_items = {k: x[k] for k in x if k in y and x[k] == y[k]}
print len(shared_items)
Python-比较两个字典并检查多少对(key, value)相等
Python-比较两个字典并检查多少对(key, value)相等
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