regex search vs match python example

Example 1: re.match() python

import re

pattern = '^a...s$'
test_string = 'abyss'
result = re.match(pattern, test_string)

if result:
  print("Search successful.")
else:
  print("Search unsuccessful.")

Example 2: re.sub in python example

import re

result = re.sub(pattern, repl, string, count=0, flags=0);