An example showing how to use invoke as standalone program.

tasks.py

#!python
# coding: utf-8

import sys
from invoke import task, Program, Collection

@task
def task1(c):
    # c.run will invoke a shell context to run the commands.
    c.run("echo Put your first task command here.")

@task
def task2(c, arg1, arg2):
    # The arguments can be set by command line options.
    # invoke task1 --arg1="xxx" --arg2="yyy"
    c.run(f"echo Put your second task command here. {arg1=}, {arg2=}")
    
if __name__ == '__main__':
    # The namespace Collection allows you to invoke tasks like this:
    # > python tasks.py task1
    # > python tasks.py task2
    # Of course, you can invoke tasks via invoke program as usual.
    # > invoke task1
    # > invoke task2
    local_task_collection = Collection.from_module(sys.modules[__name__])
    Program(namespace=local_task_collection, version="1.0").run()