Regex to drop character before a character set

Question

I need convert pandas dataframe.

I have dataframe:

import pandas as pd

df = pd.DataFrame({'data': ['10SGD01|AA169|10SGD01|AA170']})

I need to get:

data
10SGD01AA169|10SGD01AA170

df['data'] = df['data'].str.replace('|(?=AA)', '', regex=True)

This regex does not work. Where is the mistake?
Version of pandas == 2.0.3

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Answer 1

You need escape | because special regex character:

df['data'] = df['data'].str.replace(r'|(?=AA)', '', regex=True)
print (df)
                        data
0  10SGD01AA169|10SGD01AA170

Answered By: jezrael

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