擅长:python、mysql、java
<p>我希望你能帮上忙</p>
<pre><code># A: Create the new columns
df['Year'], df['Month'] = 2018, None
# A: Create the two new DataFrame
df1 = df.copy()
df2 = df.copy()
# A: Edith the month in both DataFrames
df1['Month'], df2['Month'] = 1, 2
</code></pre>