Regular Expression

Question

what is r when making a pattern like in r"spam"?

like in the example:

import re

str = "My name is David. Hi David."
pattern = r"David"
newstr = re.sub(pattern, "Amy", str)
print(newstr)

it works the same if we set the value of pattern to "David" instead of r"David"

Answer 1

string literal

a = "hello\nworld"
b = r"hello\nworld"

try print
u will see the difference

Answer 2

thanks