re.sub()

Replace matching substrings with a new string for all occurrences, or a specified number.

re.sub(<pattern>, <replacement>, string, <count>, <flags>)

A <pattern> is a regular expression that can include any of the following:

• A string: Jane Smith
• A character class code: /w, /s , /d
• A regex symbol: $, |, ^

The other arguments include:

• The replacement string (<replacement>): foo
• An integer value for the number of replacements (<count>): 10
• <flags>: IGNORECASE, VERBOSE, DOTALL

The following example replaces all occurrences of “BI” with “business intelligence”:

import re

blurb = '''The analytics firm uses a range of BI tools to  visualize data. Their internal data science team suggests
bi tools may be their most valuable resource.'''

match = re.sub(r'bi','business intelligence',blurb,flags=re.IGNORECASE)
# The ignorecase flag allows for matches regardless of case

print(match)

This will print the following where “bi” is replaced with “business intelligence”:

The analytics firm uses a range of business intelligence tools to  visualize data. Their internal data science team suggests
business intelligence tools may be their most valuable resource.

Replace all numerical values with “REDACTED”:

Code
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