擅长:python、mysql、java
<p>我认为使用熊猫的str.contains功能会更简单、更快:
<a href="https://pandas.pydata.org/pandas-docs/stable/reference/api/pandas.Series.str.contains.html" rel="nofollow noreferrer">https://pandas.pydata.org/pandas-docs/stable/reference/api/pandas.Series.str.contains.html</a></p>
<pre><code>TRADER_READER['Action'].astype(str)
StratDictionary = {True: 'Open', False: 'Close' }
TRADER_READER['Strategy']=TRADER_READER['Action'].str.contains('.*_TO_OPEN$', regex=True).replace(StratDictionary)
</code></pre>