import re
text = 'lorem ipsum abc: 3 lorem ipsum'
my_pattern = re.compile(r"abc:\s+(\d)|(\d)-xyz")
result = my_pattern.search(text)
if result:
print(list(filter(None, result.groups()))[0])
aW1wb3J0IHJlCnRleHQgPSAnbG9yZW0gaXBzdW0gYWJjOiAzIGxvcmVtIGlwc3VtJwoKbXlfcGF0dGVybiA9IHJlLmNvbXBpbGUociJhYmM6XHMrKFxkKXwoXGQpLXh5eiIpCnJlc3VsdCA9IG15X3BhdHRlcm4uc2VhcmNoKHRleHQpCgppZiByZXN1bHQ6CiAgICBwcmludChsaXN0KGZpbHRlcihOb25lLCByZXN1bHQuZ3JvdXBzKCkpKVswXSkK