擅长:python、mysql、java
<p>使用:</p>
<pre><code>df1a = df1[~df1['date'].isin(df2['date'].tolist())].copy() # Selects dates which are not in df2
df2a = df2[~df2['date'].isin(df1a['date'].tolist())].copy() # Selects dates which are not in df1a
df3 = df1a.append(df2a)
</code></pre>