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<p>我有一本字典,像:</p>
<pre><code>members = {
"member1" : ["PCP2", "PCP3"],
"member2" : ["PCP1", "PCP2"],
"member3" : ["PCP3"],
"member4" : ["PCP1"],
"member5" : ["PCP4", "PCP5"],
"member6" : ["PCP1", "PCP5"],
"member6" : ["PCP2", "PCP3", "PCP4"],
"member7" : ["PCP3", "PCP5"],
"member8" : ["PCP1", "PCP4", "PCP5"],
"member9" : ["PCP2", "PCP4"],
"member10" : ["PCP2"],
"member11" : ["PCP3"],
"member12" : ["PCP4", "PCP5"],
}
</code></pre>
<p>如何计算每个特定“PCP”在此对象中出现的次数,并返回一个新字典,其计数如下:</p>
<pre><code>PCPcounts = {
"PCP1" : 4,
"PCP2" : 5,
"PCP3" : 5,
"PCP4" : 5,
"PCP5" : 5
}
</code></pre>