python string replace regex example
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title: python string replace with regular expressions - a comprehensive tutorial
introduction:
python's re module allows you to work with regular expressions, providing powerful tools for pattern matching and manipulation within strings. in this tutorial, we'll explore how to use the re.sub() function to perform string replacement using regular expressions.
make sure you have python installed on your system. you can download and install it from python.org.
the re.sub() function is used for replacing occurrences of a pattern in a string with another string. its basic syntax is as follows:
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').
re.sub(pattern, replacement, input_text): use the re.sub() function to replace all occurrences of the pattern with the replacement string in the input text.
display the original and replaced texts using print().
regular expressions in python offer a flexible and powerful way to perform string manipulation. by using the re.sub() function, you can easily replace specific patterns within a string, making it a valuable tool for text processing and data cleaning tasks.
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