python - ＆＃39; list＆＃39;对象不可调用

Question

非常新的python并尝试查询mongo db。

我正在学习本教程（https://blog.miguelgrinberg.com/post/designing-a-restful-api-with-python-and-flask），并且我安装了一些mongodb样本餐厅数据。

@app.route('/todo/api/v1.0/tasks', methods=['GET'])
def get_tasks():
    cursor = db.find({"borough": "Bronx"})

    result = []

    for restaurant in cursor:
        result.append(restaurant)

    return result

编辑**

Traceback (most recent call last):
  File "/home/ciprian/dev/todo-api/flask/lib/python2.7/site-packages/flask/app.py", line 1997, in __call__
    return self.wsgi_app(environ, start_response)
  File "/home/ciprian/dev/todo-api/flask/lib/python2.7/site-packages/flask/app.py", line 1985, in wsgi_app
    response = self.handle_exception(e)
  File "/home/ciprian/dev/todo-api/flask/lib/python2.7/site-packages/flask/app.py", line 1540, in handle_exception
    reraise(exc_type, exc_value, tb)
  File "/home/ciprian/dev/todo-api/flask/lib/python2.7/site-packages/flask/app.py", line 1982, in wsgi_app
    response = self.full_dispatch_request()
  File "/home/ciprian/dev/todo-api/flask/lib/python2.7/site-packages/flask/app.py", line 1615, in full_dispatch_request
    return self.finalize_request(rv)
  File "/home/ciprian/dev/todo-api/flask/lib/python2.7/site-packages/flask/app.py", line 1630, in finalize_request
    response = self.make_response(rv)
  File "/home/ciprian/dev/todo-api/flask/lib/python2.7/site-packages/flask/app.py", line 1740, in make_response
    rv = self.response_class.force_type(rv, request.environ)
  File "/home/ciprian/dev/todo-api/flask/lib/python2.7/site-packages/werkzeug/wrappers.py", line 885, in force_type
    response = BaseResponse(*_run_wsgi_app(response, environ))
  File "/home/ciprian/dev/todo-api/flask/lib/python2.7/site-packages/werkzeug/wrappers.py", line 57, in _run_wsgi_app
    return _run_wsgi_app(*args)
  File "/home/ciprian/dev/todo-api/flask/lib/python2.7/site-packages/werkzeug/test.py", line 884, in run_wsgi_app
    app_rv = app(environ, start_response)
TypeError: 'list' object is not callable

似乎对我有用的解决方案：

from bson.json_util import dumps

@app.route('/todo/api/v1.0/tasks', methods=['GET'])
def get_tasks():
    cursor = db.find({"borough": "Bronx"})

    result = []

    for restaurant in cursor:
        result.append(restaurant)

    return dumps(result)