remove @username from string using python and regex

remove-username-links.py

def remove_links_and_usernames(texto):

    texto = re.sub('@\S+','',texto)
    texto = re.sub('http\S+','',texto)    

    return texto

username-remover.py

# https://www.datasnips.com/59/remove-usernames-http-links-from-tweet-data/
# https://openclassrooms.com/en/courses/6532301-introduction-to-natural-language-processing/6980751-extract-information-with-regular-expression

import re
       
texto = """
1
2
aa @john bbb
3
@mary
4
"""

transf = re.sub(r'@[^ ]+', '', texto)
print(transf)