import re
regex = re.compile(r"""
^
(?:
(?:data|https?):
(?://)?
|
\*
)
(?:
(?:
(?:
[a-z\d.*-]
|
%[a-f\d]{2}
)+
|
(?:
\[
(?:[a-f\d]{0,4}:)*
(?:[a-f\d]{0,4})
\]
)
)
(?::\d+)?
)?
$
""", flags=re.IGNORECASE | re.VERBOSE)
test_str = ""
match = regex.search(test_str)
if match:
print(f"Match was found at {match.start()}-{match.end()}: {match.group()}")
for group_num, group in enumerate(match.groups(), start=1):
print(f"Group {group_num} found at {match.start(group_num)}-{match.end(group_num)}: {group}")
Please keep in mind that these code samples are automatically generated and are not guaranteed to work. If you find any syntax errors, feel free to submit a bug report. For a full regex reference for Python, please visit: https://docs.python.org/3/library/re.html