Question

我的原始应用是这样的（以前不需要此处的路线）：

    if __name__ == "__main__" :

        parser = argparse.ArgumentParser()
        parser.add_argument('dir', type=str, help='specify the images directory')
       .....

现在将python文件本身称为app.py，以便将我的应用程序部署到heroku上，我在其中添加了一个文件Procfile文件，其中包含以下语句：web: gunicorn app:app

，并将以下内容添加到以前共享的代码行中：

app = Flask(__name__)

@app.route('/')
#if __name__ == "__main__" :
def index():
    parser = argparse.ArgumentParser()
    parser.add_argument('dir', type=str, help='specify the images directory')

我在网页上看到的错误是：

Application error
An error occurred in the application and your page could not be served. If you are the application owner, check your logs for details.

调试显示：

2018-07-11T12:03:06.041871+00:00 app[web.1]: [2018-07-11 12:03:06 +0000] [9] [ERROR] Exception in worker process
2018-07-11T12:03:06.035624+00:00 app[web.1]: File "/app/.heroku/python/lib/python3.6/site-packages/gunicorn/app/wsgiapp.py", line 41, in load_wsgiapp
2018-07-11T12:03:06.035631+00:00 app[web.1]: if __name__ == "__main__" :
2018-07-11T12:03:06.035639+00:00 app[web.1]: SyntaxError: invalid syntax
2018-07-11T12:03:06.041875+00:00 app[web.1]: Traceback (most recent call last):
2018-07-11T12:03:06.041877+00:00 app[web.1]: File "/app/.heroku/python/lib/python3.6/site-packages/gunicorn/arbiter.py", line 583, in spawn_worker
2018-07-11T12:03:06.041879+00:00 app[web.1]: worker.init_process()
2018-07-11T12:03:06.041881+00:00 app[web.1]: File "/app/.heroku/python/lib/python3.6/site-packages/gunicorn/workers/base.py", line 129, in init_process
2018-07-11T12:03:06.041882+00:00 app[web.1]: self.load_wsgi()
2018-07-11T12:03:06.041884+00:00 app[web.1]: File "/app/.heroku/python/lib/python3.6/site-packages/gunicorn/workers/base.py", line 138, in load_wsgi
2018-07-11T12:03:06.041885+00:00 app[web.1]: self.wsgi = self.app.wsgi()
2018-07-11T12:03:06.041887+00:00 app[web.1]: File "/app/.heroku/python/lib/python3.6/site-packages/gunicorn/app/base.py", line 67, in wsgi
2018-07-11T12:03:06.041889+00:00 app[web.1]: self.callable = self.load()
2018-07-11T12:03:06.041892+00:00 app[web.1]: return self.load_wsgiapp()
2018-07-11T12:03:06.041894+00:00 app[web.1]: File "/app/.heroku/python/lib/python3.6/site-packages/gunicorn/app/wsgiapp.py", line 41, in load_wsgiapp
2018-07-11T12:03:06.041890+00:00 app[web.1]: File "/app/.heroku/python/lib/python3.6/site-packages/gunicorn/app/wsgiapp.py", line 52, in load
2018-07-11T12:03:06.041895+00:00 app[web.1]: return util.import_app(self.app_uri)
2018-07-11T12:03:06.041897+00:00 app[web.1]: File "/app/.heroku/python/lib/python3.6/site-packages/gunicorn/util.py", line 350, in import_app
2018-07-11T12:03:06.041898+00:00 app[web.1]: __import__(module)
2018-07-11T12:03:06.041900+00:00 app[web.1]: File "/app/app.py", line 121
2018-07-11T12:03:06.041901+00:00 app[web.1]: if __name__ == "__main__" :
2018-07-11T12:03:06.041903+00:00 app[web.1]: ^
2018-07-11T12:03:06.041910+00:00 app[web.1]: SyntaxError: invalid syntax
2018-07-11T12:03:06.042123+00:00 app[web.1]: [2018-07-11 12:03:06 +0000] [9] [INFO] Worker exiting (pid: 9)
2018-07-11T12:03:06.201688+00:00 app[web.1]: [2018-07-11 12:03:06 +0000] [4] [INFO] Shutting down: Master
2018-07-11T12:03:06.202039+00:00 app[web.1]: [2018-07-11 12:03:06 +0000] [4] [INFO] Reason: Worker failed to boot.
2018-07-11T12:03:06.328723+00:00 heroku[web.1]: Process exited with status 3

最重要的一行是Reason: Worker failed to boot，这使我认为我没有正确启动该应用程序，有人可以引导我到那里（它指向以if开头的行，但这对我来说没有意义，因为（有评论）。

即使在删除包含if的行并推送后，我仍然收到与之相关的错误。

Answer 1

检查此样板是否可以帮助您。

import argparse
from flask import Flask


def create_app(config=None):
    app = Flask(__name__)

    app.config.update(dict(DEBUG=True))
    app.config.update(config or {})

    # Definition of the routes. Put them into their own file. See also
    # Flask Blueprints: http://flask.pocoo.org/docs/latest/blueprints
    @app.route("/")
    def hello_world():
        return "Hello World"

    return app


if __name__ == "__main__":
    parser = argparse.ArgumentParser()
    parser.add_argument('dir', type=str, help='specify the images directory')
    parser.add_argument("-p", "--port", action="store", default="8000")

    args = parser.parse_args()
    port = int(args.port)
    app = create_app()
    app.run(host="0.0.0.0", port=port)

如何正确部署我的烧瓶应用程序？

1 个答案: