tasks/swe-next-4820778e75de86be60f1/instruction.md

schedule.next_run() does not support filtering by tag

Currently, calling schedule.next_run() with a tag argument raises a TypeError because the function doesn't accept any parameters. There is no way to ask "when is the next run for jobs with a specific tag?"

Reproduction

import schedule
from schedule import every

def job(): pass

every(5).seconds.do(job).tag("tag1")
every(2).hours.do(job).tag("tag1", "tag2")
every(1).minutes.do(job).tag("tag1", "tag3", "tag2")

# Trying to get the next run time for jobs tagged "tag1"
print(schedule.next_run("tag1"))

This raises:

TypeError: next_run() takes 0 positional arguments but 1 was given

Similarly, schedule.default_scheduler.next_run (a property) cannot be called with a tag to filter results, and there is no get_next_run(tag) method on the Scheduler class.

Expected behavior

• schedule.next_run("tag1") should return the next_run datetime of the earliest-scheduled job that has the tag "tag1".
• schedule.next_run("tag4") should return None if no jobs have that tag.
• schedule.default_scheduler.get_next_run("tag2") should return the earliest next run among jobs tagged "tag2".
• Calling schedule.next_run() with no arguments should continue to work as before (returning the global next run across all jobs).

Actual behavior

Passing any tag argument to schedule.next_run() raises TypeError: next_run() takes 0 positional arguments but 1 was given. There is no tag-aware method available on the Scheduler class either.

Work in /workspace. Submit your fix in the existing Python source files under schedule. Preserve the other public behavior. The environment is offline; dependencies are preinstalled. Grading runs the repository's test suite in a fresh environment, using your submitted source files.