Python (re)

Cron Expression (Quartz/Spring, 6-Field) in PY

Validate 6-field Quartz/Spring cron expressions including the seconds field at the front.

Pattern

regexPY

^(\*|([0-5]?\d))\s+(\*|([0-5]?\d))\s+(\*|([01]?\d|2[0-3]))\s+(\*|([1-9]|[12]\d|3[01]))\s+(\*|([1-9]|1[0-2]))\s+(\*|\?|[0-7])$

Python (re) code

pyPython

import re

pattern = re.compile(r"^(\*|([0-5]?\d))\s+(\*|([0-5]?\d))\s+(\*|([01]?\d|2[0-3]))\s+(\*|([1-9]|[12]\d|3[01]))\s+(\*|([1-9]|1[0-2]))\s+(\*|\?|[0-7])$")
input_text = "0 0 9 * * 1"
for m in pattern.finditer(input_text):
    print(m.group(0))

Stdlib `re` module — no third-party dependency. Works on Python 3.6+.

How the pattern works

Six fields: seconds (0–59), minutes (0–59), hours (0–23), day-of-month (1–31), month (1–12), and day-of-week (0–7, where Quartz also accepts `?` to mean "no specific value"). Each field also accepts `*` for any value. This is the Quartz/Spring scheduler format — distinct from the standard 5-field Unix cron in batch 1.

Examples

Input

0 0 9 * * 1

Matches

0 0 9 * * 1

Input

30 15 12 ? * 5

Matches

30 15 12 ? * 5

Input

0 9 * * 1

No match

—

Same pattern, other engines

JavaScript / ECMAScript

Supported

See how this pattern looks (and behaves) in JavaScript's built-in RegExp.

Go (RE2)

Supported

See how this pattern looks (and behaves) in Go's `regexp` package (RE2 engine).

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