import re
def remove_special_characters(string):
return re.sub(r"[^a-zA-Z0-9]+", "", string)
string = "Python! 3.12.1 is a high-level, general-purpose programming language."
string = remove_special_characters(string)
print(string)
'''
run:
Python3121isahighlevelgeneralpurposeprogramminglanguage
'''