擅长:python、mysql、java
<p><code>gourpby</code>+<code>transform</code></p>
<pre><code>df1['random id'] = df1.groupby('idz').idz.transform(lambda x : id_generator(3))
df1
Out[657]:
Name id idz random id
0 John 2 2 35P
1 Susie 3 3 6UU
2 Jack 0 0 XGF
3 Jill 1 1 5LC
4 John 2 2 35P
</code></pre>