import re
regex = re.compile(r"""
^P
(?=\w*\d)
(?:(?<years>\d+)Y|Y)?
(?:(?<month>\d+)M|M)?
(?:(?<days>\d+)D|D)?
(?:
T
(?:(?<hours>\d+)H|H)?
(?:(?<minutes>\d+)M|M)?
(?:
(?<seconds>
\d+
(?:
\.
\d{1,2}
)?
)S
|
S
)?
)?$
""", flags=re.VERBOSE)
test_str = "P1Y3M2DT3H3.12S"
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