擅长:python、mysql、java
<p>将<a href="http://pandas.pydata.org/pandas-docs/stable/indexing.html#boolean-indexing" rel="nofollow noreferrer">^{<cd1>}</a>与<a href="http://pandas.pydata.org/pandas-docs/stable/generated/pandas.Series.str.startswith.html" rel="nofollow noreferrer">^{<cd2>}</a>或<a href="http://pandas.pydata.org/pandas-docs/stable/generated/pandas.Series.str.contains.html" rel="nofollow noreferrer">^{<cd3>}</a>与{<cd4>}一起使用作为字符串<code>^</code>和参数<code>na=False</code>的开头,因为缺少值:</p>
<pre><code>df1 = df[df['KEGG_KOs'].str.startswith('K0', na=False)]
print (df1)
query_name KEGG_KOs
3 PROKKA_00019 K00240
4 PROKKA_00020 K00246
5 PROKKA_00022 K02887
</code></pre>
<p>或者:</p>
^{pr2}$