python string replace regex example

title: python string replace with regular expressions - a comprehensive tutorial
introduction:
let's say we want to replace all occurrences of the word "apple" with "orange" in a given text using regular expressions.
import re: import the regular expressions module.
input_text: define the input text that contains occurrences of the word "apple."
pattern: create a regular expression pattern using \b for word boundaries to match the whole word "apple."
replacement: set the string to replace the matched pattern with (in this case, 'orange').
display the original and replaced texts using print().
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