擅长:python、mysql、java
<p>您可以创建函数并将其<code>apply</code>添加到数据集:</p>
<pre><code>>>> def foo(x):
... if x['A'] == 0:
... return 'x'
... elif x['A'] < 200:
... return 'y'
... else:
... return 'z'
...
>>> df['B'] = df.apply(foo, axis=1)
>>> df
A B
TRDNumber
ALB2008081610 430 z
ALB200808167 0 x
ALB200808168 190 y
</code></pre>