如何检查字典中的值是否都具有相同的值X? [英] How do I check if values in a dictionary all have the same value X?

问题描述

我有一个字典，我正在尝试检查所有具有相同数值(例如1)的值是否罕见.

I have a dictionary, and I'm trying to check for the rare occurrence of all values having the same numerical value, say 1. How would I go about doing this in an efficient manner?

推荐答案

我假设您的意思是相同的值:

I will assume you meant the same value:

d = {'a':1, 'b':1, 'c':1}
len(set(d.values()))==1    # -> True

如果要检查特定值，怎么办

If you want to check for a specific value, how about

testval = 1
all(val==testval for val in d.values())   # -> True

此代码通常会在早期(快速)失败

this code will most often fail early (quickly)

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