import asyncio

g_lock = asyncio.Lock()

def get_func(i):
    async def func():
        while True:
          async with g_lock:
            print(i)
            await asyncio.sleep(i/10)
    return func


funcs = [get_func(i) for i in range(3)]


async def main():
  tasks = [asyncio.create_task(func()) for func in funcs]
  for task in tasks:
    await task

asyncio.run(main())