擅长:python、mysql、java
<p>初始化<a href="http://pandas.pydata.org/pandas-docs/stable/generated/pandas.DataFrame.html" rel="nofollow">^{<cd1>}</a>。你知道吗</p>
<pre><code>df = pd.DataFrame(['name1-L89783','nametwo-L33009'],columns=['A',])
>>> df
A
0 name1-L89783
1 nametwo-L33009
</code></pre>
<p>对行执行<a href="http://pandas.pydata.org/pandas-docs/version/0.17.1/generated/pandas.DataFrame.apply.html" rel="nofollow">^{<cd2>}</a>函数,并将结果放入新列。你知道吗</p>
<pre><code>df['B'] = df['A'].apply(lambda x: x.split('-')[0])
>>> df
A B
0 name1-L89783 name1
1 nametwo-L33009 nametwo
</code></pre>