擅长:python、mysql、java
<p>这是使用<a href="https://pandas.pydata.org/pandas-docs/stable/generated/pandas.Series.str.split.html" rel="noreferrer">^{<cd1>}</a>和<a href="https://pandas.pydata.org/pandas-docs/stable/generated/pandas.Series.map.html" rel="noreferrer">^{<cd2>}</a>的一种方法:</p>
<pre><code>df['word_count'] = df['col'].str.split().map(len)
</code></pre>
<p>上面假设<code>df['col']</code>是一系列字符串。</p>
<p>示例:</p>
<pre><code>df = pd.DataFrame({'col': ['This is an example', 'This is another', 'A third']})
df['word_count'] = df['col'].str.split().map(len)
print(df)
# col word_count
# 0 This is an example 4
# 1 This is another 3
# 2 A third 2
</code></pre>