擅长:python、mysql、java
<pre><code>df["keywords"] = df["keywords"].apply(lambda x: ",".join([w[1:] if w[0] == "r" else w for w in x.split(",")]) )
df
a name keywords
1 ramesh rahul,apple
2 venkat temple
3 rajesh cake,phone,maths
4 lamda con
5 feast camera,tab
</code></pre>