擅长:python、mysql、java
<p>使用<code>numpy.where</code></p>
<p><strong>例如:</strong></p>
<pre><code>import pandas as pd
import numpy as np
testdata = pd.DataFrame({"pfType": ['NK225M', 'TOPIXM', "Hello", "World"]})
testdata['pfType'] = np.where((testdata['pfType'] == "TOPIXM") | (testdata['pfType'] == 'NK225M'), testdata['pfType']+"F", testdata['pfType'])
print(testdata)
</code></pre>
<p><strong>输出:</strong></p>
<pre><code> pfType
0 NK225MF
1 TOPIXMF
2 Hello
3 World
</code></pre>