import asyncio
import time
from motor.motor_asyncio import AsyncIOMotorClient


async def get_all_from_coll(col):
    client = AsyncIOMotorClient("localhost", 27017)
    db = client.project_matrix
    cursor = db[col].find()
    time.sleep(5)
    for document in await cursor.to_list(length=100):
        print(document)


loop = asyncio.get_event_loop()
print('001')
loop.run_until_complete(get_all_from_coll('users'))
print('002')

>>>001
>>>{'_id': ObjectId('58d9b178d011b53743d44413'), 'username': 'test1', 'password': 'test', '__v': 0}
>>>{'_id': ObjectId('58d9b229d011b53743d44414'), 'username': 'test2', 'password': 'test', '__v': 0}
>>>002

for document in await cursor.to_list(length=100):
    # (wrong)

async for document in cursor.limit(100):
    # (ok)