Cron Named Shortcut (@reboot, @daily, etc.) Regex for Python

What this pattern does

This page provides a well-structured, multi-part regular expression for matching cron named shortcut (@reboot, @daily, etc.), ported and verified for Python. A rigorously tested regex reduces debugging time and protects your application from edge-case failures. The snippet below is ready to drop into your Python project — whether you're validating in a Django view, a FastAPI endpoint, or a standalone data processing script.

Python Implementation

# Cron Named Shortcut (@reboot, @daily, etc.)
# ReDoS-safe | RegexVault — Dev & Systems > Cron

import re

cron_named_shortcut_reboot_daily_etc_pattern = re.compile(r'^@(?:reboot|yearly|annually|monthly|weekly|daily|midnight|hourly)$')

def validate_cron_named_shortcut_reboot_daily_etc(value: str) -> bool:
    return bool(cron_named_shortcut_reboot_daily_etc_pattern.fullmatch(value))

# Example
print(validate_cron_named_shortcut_reboot_daily_etc("@reboot"))  # True

Test Cases

When to use this pattern

This pattern is drawn from the Dev & Systems > Cron category and carries a ReDoS-safe certification. That matters for Python developers because particularly important in Python web servers where CPU-bound regex operations can stall concurrent request handling. RegexVault audits patterns against known backtracking attack vectors, ensuring you have the necessary context before using this regex in a high-stakes production environment.

Common Pitfalls

Technical Notes

These are Vixie cron convenience shortcuts. @annually is a synonym for @yearly. @midnight is a synonym for @daily. Not available in all cron implementations.