Find a Text Pattern in python Data Frame

Question

I have DataFrame having column with Chat Transcript.

ID  Chat
1   P1: Please call me soon P2 - will call you
2   P2: Please call me soon P1 - will call you

I want to create a new column with yes/No or 1/0 if chat has pattern "call me soon" only between P1 & P2 But not between P2 & P1.

Out put will be like

ID  Chat                                          Call me soon
1   P1: Please call me soon P2 - will call you        Yes
2   P2: Please call me soon P1 - will call you         No

I need to do it in python. Please suggest a appropriate method.

cs95 · Accepted Answer · 2018-03-09 09:23:22Z

2

Use str.contains + np.where:

df['Call me soon'] = np.where(
    df.Chat.str.contains('(?<=P1).*?call me soon.*?(?=P2)'), 'Yes', 'No'
)

df
   ID                                        Chat Call me soon
0   1  P1: Please call me soon P2 - will call you          Yes
1   2  P2: Please call me soon P1 - will call you           No

Regex Details

(?<=P1)       # lookbehind, match P1
.*?           # any character - non-greedy
call me soon
.*?       
(?=P2)        # lookahead, match P2

answered Mar 9, 2018 at 9:23

cs95

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