擅长:python、mysql、java
<p>我找到了一个简单但有效的解决方案:</p>
<h2>合并3个数据帧,内部和外部:</h2>
<pre><code>df1 = Df1()
df2 = Df2()
df3 = Df3()
inner = pd.merge(pd.merge(df1,df2,on='<Common column>',how='inner'),df3,on='<Common column>',how='inner')
outer = pd.merge(pd.merge(df1,df2,on='<Common column>',how='outer'),df3,on='<Common column>',how='outer')
</code></pre>
<h2>现在,丢失的条目(行)的数量是:</h2>
^{pr2}$