convert taskwarrior tasks to ical entries when they have a scheduled date

tasks_to_ical.py

#!/usr/bin/env python3
import os.path
from ics import Calendar, Event
import subprocess
import json

def read_tasks():
    output = subprocess.check_output(['task', 'export'])
    for task in json.loads(output.decode('utf-8')):
        if task['status'] == 'completed':
            continue
        if 'scheduled' in task:
            yield task


if __name__ == "__main__":
    c = Calendar()
    for task in read_tasks():
        e = Event()
        e.name = task['description']
        e.begin = task['scheduled']
        c.events.append(e)

    with open(os.path.expanduser('~/.local/share/calendar/tasks/tasks.ics'), 'w') as f:
        f.writelines(c)

This is great! Thanks for doing this. ics has changed their API, by the way. Instead of c.events.append(e) on line 22, it should be c.events.add(e).

this is great indeed many thanks to @andir (and @kylehovey for the comment). However, now in the line 21 i get an error (arrow.parser.ParserError: Could not match input to any of ['YYYY-MM-DDTHH:mm'] on '20210730T220000Z'). Is it because ics changed its format (or timewarrior?)

I changed manually the date to 20210730T220000Z to2021-07-30T00:00 and it worked. But I think it does not correspond to my timeline

Ok. That's the solution that worked for me with datetime package (with my corresponding timezone: + 2 hours). I also collected the due field instead of the scheduled field:

#!/usr/bin/env python3

import datetime
from datetime import timedelta
import os.path
from ics import Calendar, Event
import subprocess
import json

def read_tasks():
    output = subprocess.check_output(['task', 'export'])
    for task in json.loads(output.decode('utf-8')):

       if task['status'] == 'completed':
           continue
       if 'due' in task:
           yield task

if __name__ == "__main__":
    c = Calendar()
    for task in read_tasks():
        print(task)

        dt = datetime.datetime.strptime(task["due"], "%Y%m%dT%H%M%S%fZ") + timedelta(hours=2)
        dt = dt.strftime('%Y-%m-%dT%H:%M')
        task["due"] = dt
        e = Event()
        e.name = task['description']
        e.begin = task['due']
        c.events.add(e)
    with open(os.path.expanduser('~/.local/share/calendar/tasks/tasks.ics'), 'w') as f:
        f.writelines(c)