I have a dataframe like this.

and I want something like this:

I want to add numbering for every '(p)' tag for every row. A row can contain any number of

tags, so I want to add according to that. Please help me to solve this.

CodePudding user response：

I would match a regular expression pattern and then rebuild the (p)...(/p) element:

import re
import pandas as pd

# Test DataFrame
df = pd.DataFrame({"data":["(p)apple(/p)(p)boy(/p)(p)cat(/p)","(p)apple(/p)(p)boy(/p)"]})

pattern = re.compile("\(p\)(.*?)\(/p\)")

df["data"].apply(lambda x: [f'(p){i 1} {s}(/p)' for i, s in enumerate(pattern.findall(x))])