Regular Expressions 101

Group 1((?:[\d]-?){7,})

Non-Capturing Group(?:[\d]-?){7,}

{7,}repeats the group contents below at least 7 times:

Character Class[\d]

\da digit

-?optionally matches the literal - (45₁₀ / 55₈ / 2D₁₆)

Global pattern flags

g modifier: global. Finds all matches instead of stopping after the first

m modifier: multiline. Causes ^ and $ to match the start and end of each line, not only the start and end of the string

Detailed match information will be displayed here automatically.

25 tokens

Regular Expression

((?:[\d]-?){7,})

New

import pandas as pd
df = pd.DataFrame({'Text':['This person num is 111-888-8780 and other',
                          'dont block 23 here',
                          'two numbers: 001-002-1234 and some other 123-456-7788 here',
                          'block this 666-666-6666',
                           '1-510-999-9999 is one more'], 
                  'P_ID': [1,2,3,4,5],
                  'N_ID' : ['A1', 'A2', 'A3','A4', 'A5']})
123-452

Regular Expression

Substitution