<p>我正在尝试创建基于两列组合的唯一代码。任何帮助都将非常好。多谢各位</p>
<pre><code>import pandas as pd
data = [['ajay','AL'],['ajay','AB'],['ajay','AL'],['Alex','Ac'],['Alex','Ay'],['Alex','Ac'],['Alex','Ac'],['Bob','Ay'],['Clarke','cv']]
df = pd.DataFrame(data,columns=['Name','Cat'],dtype=float)
</code></pre>
<p>输入:</p>
<pre><code> Name Cat
0 ajay AL
1 ajay AB
2 ajay AL
3 Alex Ac
4 Alex Ay
5 Alex Ac
6 Alex Ac
7 Bob Ay
8 Clarke cv
</code></pre>
<p>输出:</p>
<pre><code> Name Cat code
0 ajay AL AJ_1
1 ajay AB AJ_2
2 ajay AL AJ_1
3 Alex Ac AL_1
4 Alex Ay AL_2
5 Alex Ac AL_1
6 Alex Ac AL_1
7 Bob Ay Bo_1
8 Clarke cv Cl_1
</code></pre>
<p>谢谢</p>