python-regexHow to regex match excluding a character in Python?

To regex match excluding a character in Python, you can use the re.search() function with the ^ and $ symbols. The ^ symbol indicates the start of the string, and the $ symbol indicates the end of the string. Any character that is not the character you want to exclude will be matched.

For example, to match a string that starts with Hello and ends with World but does not contain the letter a, you can use the following code:

import re

string = "Hello World"

if re.search("^Hello[^a]*World$", string):
    print("Match found!")

Output example

Match found!

The code consists of the following parts:

1. import re: imports the re module which contains the re.search() function.
2. string = "Hello World": assigns the string to be matched to the string variable.
3. if re.search("^Hello[^a]*World$", string):: uses the re.search() function to search for a match in the string variable. The regex pattern ^Hello[^a]*World$ matches any string that starts with Hello, does not contain the letter a, and ends with World.
4. print("Match found!"): prints the message Match found! if a match is found.

Helpful links

• Python Regular Expressions
• Regular Expression Syntax

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