擅长:python、mysql、java
<p>您可以在<a href="https://pandas.pydata.org/docs/reference/api/pandas.Series.str.split.html" rel="nofollow noreferrer"><strong>^{<cd3>}</strong></a>之后的<code>str[0]</code>上使用<a href="https://pandas.pydata.org/docs/reference/api/pandas.Series.value_counts.html" rel="nofollow noreferrer"><strong>^{<cd1>}</strong></a>:</p>
<pre class="lang-py prettyprint-override"><code>df = pd.DataFrame({'Names': ['Mr. Richard Vance','Mrs. Angela Bell','Mr. Stewart Randall','Mr. Andrew Ogden','Mrs. Maria Berry','Mrs. Lillian Wallace','Mr. William Bailey','Mr. Paul Ball','Miss Pippa Bond','Miss Caroline Gray','']})
df.Names.str.split().str[0].value_counts(dropna=False)
# Mr. 5
# Mrs. 3
# Miss 2
# NaN 1
# Name: Names, dtype: int64
</code></pre>