擅长:python、mysql、java
<p>使用<code>%Y</code>解析<code>YYYY</code>,<code>%y</code>是<code>YY</code>年格式:</p>
<pre><code>data = pd.DataFrame({'ym':['201704','201705','201706']})
data['ym'] = pd.to_datetime(data['ym'], format="%Y%m")
data['year'], data['month'] = data['ym'].dt.year, data['ym'].dt.month
print (data)
ym year month
0 2017-04-01 2017 4
1 2017-05-01 2017 5
2 2017-06-01 2017 6
</code></pre>