擅长:python、mysql、java
<p>另一种选择是应用lambda,以便:</p>
<pre><code>df['total'] = df[['goals','goals_against','games_in_domestic_league']].apply(lambda x: (x>0).sum(), axis=1)
</code></pre>
<p>预期结果:</p>
<pre><code> team goals goals_against games_in_domestic_league total
0 juventus 1 0 0 1
1 barcelona 0 1 1 2
2 santos 2 1 2 3
</code></pre>