擅长:python、mysql、java
<p>尝试:</p>
<pre><code>df[['domain', 'id']]= df['Name'].str.split('\\', expand=True)
</code></pre>
<hr/>
<pre><code> No Course Name domain id
0 1 BM GAR\samege GAR samege
1 2 BI GER\yun GER yun
2 3 MM steli steli None
3 4 SC ilo18yu ilo18yu None
</code></pre>
<h2>编辑:</h2>
<p>尝试:</p>
<pre><code>df[['domain', 'id']] = pd.DataFrame([x.split('\\') if len(x.split('\\'))==(2) else ['None', x] for x in df['Name']])
</code></pre>
<hr/>
<pre><code> No Course Name domain id
0 1 BM GAR\samege GAR samege
1 2 BI GER\yun GER yun
2 3 MM steli None steli
3 4 SC ilo18yu None ilo18yu
</code></pre>