Extract named regex fields.
Python: Use named capture groups to parse a known date-shaped identifier.
import re
match = re.fullmatch(r"(?P<year>[0-9]{4})-(?P<month>[0-9]{2})", "2026-10")
if match:
print(match.groupdict())Expected output EXAMPLE
{'year': '2026', 'month': '10'}
Details
Save as snippet.py and run python3 snippet.py. Uses the Python standard library. Use named capture groups to parse a known date-shaped identifier.
This pattern checks structure, not whether the month is a valid calendar month.
Tested on Ubuntu 24.04.5 LTS · · Python 3.12.3 · python3 3.12.3-0ubuntu2.1
Test inputs, results and environment
The exact published code ran in a dedicated Linux test container with prepared inputs. Unprivileged snippet process, external networking disabled, read-only root filesystem, and a fresh temporary working directory. Fixtures and output records are isolated from the application database. Testing covers this example and its stated checks, not every input, operating system, or runtime version. The Linux container shares its host's kernel; this is not a native Windows test.
- Architecture / host kernel
- x86_64 / 6.18.54.1-microsoft-standard-WSL2
- Snippet identity / locale
- uid=65534, gid=65534 (unprivileged) / C.UTF-8
- Interpreter invocation
python3 -c <published code>- Container image ID
sha256:32dc2d998158b6554c99b73b533f423696a0f3e31e8cbea9db10b5eee9a2fadd- Code SHA-256
9dabfc770214e478362ab27d30b7fdf6c67596a2d1b8b170b0737aa198b37e4e- Dependencies
- python3 3.12.3-0ubuntu2.1
Test input setup
These are the prepared inputs used by the test harness. See Details above for the prerequisites and how to run this example.
# No input files required.
Observed standard output
{'year': '2026', 'month': '10'}
Exit code: 0. Standard error: empty. Validation: Exact stdout comparison. System-dependent values above are one recorded run.