Python &引用；flask.cli.NoAppException“；运行烧瓶应用程序时

我是python开发的新手，对flask一无所知，我被分配了一个使用flask开发的项目。经过几周的工作，我现在能够解决所有的依赖关系，项目现在已经成功编译。但当我使用flask run运行项目，然后在浏览器中输入url时，它抛出“flask.cli.NoAppException”。我怎样才能运行我的项目？我已经这样尝试过了

设置烧瓶_APP=init.py

设置烧瓶_ENV=开发

烧瓶运行

• 服务烧瓶应用程序“init.py”（延迟加载）
• 环境：发展
• 调试模式：打开
• 使用stat重新启动
• 调试器处于活动状态
• 调试器PIN:202-733-235
• 正在运行（按CTRL+C退出）

这是回溯

"FLASK_APP=myappnam:name to specify one.
Traceback (most recent call last)

    File "C:\Program Files\Python38\Lib\site-packages\flask\_compat.py", line 39, in reraise

    raise value

    File "C:\Program Files\Python38\Lib\site-packages\flask\cli.py", line 97, in find_best_app

    raise NoAppException(

    flask.cli.NoAppException: Failed to find Flask application or factory in module "myappnam". Use "FLASK_APP=myappnam:name to specify one.

The debugger caught an exception in your WSGI application. You can now look at the traceback which led to the error.

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这是我的--init--.py文件

这是我的项目结构

---

我正在使用pycharm and widows 10。

在您的

创建应用程序

功能中，您可能不希望在应用程序后期初始化时使用全局关键字

在您提供的示例中，从未调用

create\u app

函数，因此从未创建app实例。使用

create_app

功能更为常见，如下所示：

def create_app（）：
app=烧瓶。烧瓶（\uuuuu名称\uuuuuuu）
#做一些设置
返回应用程序
app=create_app（）

---

应用程序实例也应称为

app

，而不是

flask\u app

。当然，您可以随意调用它，但默认情况下flask会查找

app

。要在

create\u APP

函数中指定您自己的更改

FLASK\u APP=\uu init\uuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuupy

到

FLASK\u APP=\uuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuu

在您提供的示例中，从未调用
create\u app
函数，因此从未创建app实例。使用
create_app
功能更为常见，如下所示：

def create_app（）：
app=烧瓶。烧瓶（\uuuuu名称\uuuuuuu）
#做一些设置
返回应用程序
app=create_app（）

应用程序实例也应称为
app
，而不是
flask\u app
。当然，您可以随意调用它，但默认情况下flask会查找
app
。要指定您自己的更改，请将

import os
import logging
import gevent
import datetime
import rollbar

from gevent.queue import Queue
from gevent.event import AsyncResult
import zmq.green as zmq

from werkzeug.contrib.fixers import ProxyFix

# Greens the postgress connector
try:
    import psycogreen.gevent
    psycogreen.gevent.patch_psycopg()
except ImportError:
    pass

from rauth.service import OAuth2Service

from flask import Flask, Request
from flask_sqlalchemy import SQLAlchemy
from flask_bcrypt import Bcrypt
from flask_login import LoginManager, current_user
from flask_assets import Environment
from flask_uploads import UploadSet, configure_uploads, IMAGES

from app.util import setup_logging
from app.exceptions import TimeoutError, BackendError
import app.exceptions


flask_app = None

# Have to use an actor pattern because we cannot allow more than one request to
# be pending at a time.
class Backend(gevent.Greenlet):
    def __init__(self):
        super(Backend, self).__init__()

        self.inbox = Queue()
        self.zmq_context = zmq.Context()
        self.zmq_socket = None
        self.init_socket()

    def init_socket(self):
        zmq_socket = self.zmq_socket
        if zmq_socket is not None:
            zmq_socket.close(0)

        zmq_socket = self.zmq_context.socket(zmq.REQ)
        zmq_socket.connect(flask_app.config["SERVER_ZMQ_URI"])
        self.zmq_socket = zmq_socket

    def process(self, request):
        zmq_socket = self.zmq_socket

        poller = zmq.Poller()
        poller.register(zmq_socket, zmq.POLLIN)

        zmq_socket.send_json({
            "command": request["command"],
            "arguments": request["arguments"]
        })
        sockets = dict(poller.poll(10 * 1000))

        if zmq_socket not in sockets:
            self.init_socket()
            result = request["result"]
            result.set_exception(TimeoutError("The request to the backend timed out."))
            return

        received = zmq_socket.recv_json()

        result = request["result"]
        if received["success"]:
            result.set(received["result"])
        else:
            result.set_exception(BackendError(received["result"]))

    def _run(self):
        while True:
            self.process(self.inbox.get())            

    def send(self, command, **kwargs):
        result = AsyncResult()
        self.inbox.put({
            "command": command,
            "arguments": kwargs,
            "result": result
        })
        return result.get()


class RollbarRequest(Request):
    @property
    def rollbar_person(self):
        if current_user.is_anonymous:
            return {
                "id": 0, 
                "username": "anonymous"
            }
        return {
            "id": current_user.id,
            "username": current_user.name,
            "email": current_user.email_address
        }


def create_app(*args, **kwargs):
    global flask_app
    global l

    app_mode = os.environ.get("APP_MODE")

    assert app_mode is not None, "APP_MODE environment variable must be set"

    flask_app = Flask(__name__)
    flask_app.request_class = RollbarRequest
    flask_app.config.from_object("config.mode_{}".format(app_mode))
    flask_app.config["APP_MODE"] = app_mode

    setup_logging(flask_app.config["LOGGING_LEVEL"])

    l = logging.getLogger(__name__)
    l.info("starting in mode {}".format(app_mode))

    if not flask_app.config["DEBUG"]:
        rollbar.init(
            flask_app.config["ROLLBAR_API_KEY"],
            app_mode,
            allow_logging_basic_config=False
        )

    flask_app.jinja_env.globals.update(
        current_year=lambda: datetime.datetime.now().year
    )

    # Have to do this so that redirects work in proxy mode behind NGINX.
    if not flask_app.debug:
        flask_app.wsgi_app = ProxyFix(flask_app.wsgi_app)

    flask_app.db = SQLAlchemy(flask_app)

    flask_app.bcrypt = Bcrypt(flask_app)
    flask_app.assets = Environment(flask_app)

    flask_app.images = UploadSet("images", IMAGES)
    configure_uploads(flask_app, flask_app.images)

    flask_app.photos = UploadSet("photos", IMAGES)
    configure_uploads(flask_app, flask_app.photos)

    login_manager = LoginManager()
    login_manager.login_view = "signin"
    login_manager.login_message_category = "alert"  # Need newer release of Flask-Login for this to work.
    login_manager.init_app(flask_app)

    flask_app.facebook = OAuth2Service(
        name="facebook",
        base_url="https://graph.facebook.com/v2.8/",
        client_id=flask_app.config["FACEBOOK_CLIENT_ID"],
        client_secret=flask_app.config["FACEBOOK_CLIENT_SECRET"]
    )

    from app import views
    from app import models
    from app import commands

    flask_app.backend = Backend()
    flask_app.backend.start()

    app.exceptions.register(flask_app)

    return flask_app