Python + Flask+ Heroku のLINE bot でエラー

Question

前提・実現したいこと

以下の記事に従って，LINEのボットを作ろうとしています。

https://note.mu/ellreka/n/nf2b746578e73

しかし，手順通りにすすめてもエラーになってしまいます。

慣れないのでログファイルを見ようにもわかりません。
よろしくおねがいします。

発生している問題・エラーメッセージ

heroku logs --tail -a 【自分のappの名前】
の実行結果

2018-11-06T15:15:27.000000+00:00 app[api]: Build started by user [e-mail]
2018-11-06T15:15:43.681500+00:00 app[api]: Release v7 created by user [e-mail]
2018-11-06T15:15:43.681500+00:00 app[api]: Deploy 11ee8810 by user [e-mail]
2018-11-06T15:15:44.411877+00:00 heroku[web.1]: State changed from crashed to starting
2018-11-06T15:15:48.182520+00:00 heroku[web.1]: Starting process with command `gunicorn app:app --log-file -`
2018-11-06T15:15:51.662563+00:00 app[web.1]: [2018-11-06 15:15:51 +0000] [4] [INFO] Starting gunicorn 19.9.0
2018-11-06T15:15:51.663430+00:00 app[web.1]: [2018-11-06 15:15:51 +0000] [4] [INFO] Listening at: http://0.0.0.0:56746 (4)
2018-11-06T15:15:51.663582+00:00 app[web.1]: [2018-11-06 15:15:51 +0000] [4] [INFO] Using worker: sync
2018-11-06T15:15:51.669905+00:00 app[web.1]: [2018-11-06 15:15:51 +0000] [10] [INFO] Booting worker with pid: 10
2018-11-06T15:15:51.718031+00:00 app[web.1]: [2018-11-06 15:15:51 +0000] [11] [INFO] Booting worker with pid: 11
2018-11-06T15:15:52.412876+00:00 heroku[web.1]: State changed from starting to up
2018-11-06T15:15:52.000000+00:00 app[api]: Build succeeded
2018-11-06T15:15:53.044105+00:00 app[web.1]: [2018-11-06 15:15:53 +0000] [10] [ERROR] Exception in worker process
2018-11-06T15:15:53.044128+00:00 app[web.1]: Traceback (most recent call last):
2018-11-06T15:15:53.044131+00:00 app[web.1]: File "/app/.heroku/python/lib/python3.6/site-packages/gunicorn/arbiter.py", line 583, in spawn_worker
2018-11-06T15:15:53.044133+00:00 app[web.1]: worker.init_process()
2018-11-06T15:15:53.044135+00:00 app[web.1]: File "/app/.heroku/python/lib/python3.6/site-packages/gunicorn/workers/base.py", line 129, in init_process
2018-11-06T15:15:53.044136+00:00 app[web.1]: self.load_wsgi()
2018-11-06T15:15:53.044138+00:00 app[web.1]: File "/app/.heroku/python/lib/python3.6/site-packages/gunicorn/workers/base.py", line 138, in load_wsgi
2018-11-06T15:15:53.044139+00:00 app[web.1]: self.wsgi = self.app.wsgi()
2018-11-06T15:15:53.044142+00:00 app[web.1]: File "/app/.heroku/python/lib/python3.6/site-packages/gunicorn/app/base.py", line 67, in wsgi
2018-11-06T15:15:53.044144+00:00 app[web.1]: self.callable = self.load()
2018-11-06T15:15:53.044145+00:00 app[web.1]: File "/app/.heroku/python/lib/python3.6/site-packages/gunicorn/app/wsgiapp.py", line 52, in load
2018-11-06T15:15:53.044146+00:00 app[web.1]: return self.load_wsgiapp()
2018-11-06T15:15:53.044148+00:00 app[web.1]: File "/app/.heroku/python/lib/python3.6/site-packages/gunicorn/app/wsgiapp.py", line 41, in load_wsgiapp
2018-11-06T15:15:53.044150+00:00 app[web.1]: return util.import_app(self.app_uri)
2018-11-06T15:15:53.044151+00:00 app[web.1]: File "/app/.heroku/python/lib/python3.6/site-packages/gunicorn/util.py", line 350, in import_app
2018-11-06T15:15:53.044153+00:00 app[web.1]: __import__(module)
2018-11-06T15:15:53.044154+00:00 app[web.1]: File "/app/app.py", line 18, in <module>
2018-11-06T15:15:53.044157+00:00 app[web.1]: channel_secret = os.environ('LINE_CHANNEL_SECRET')
2018-11-06T15:15:53.044165+00:00 app[web.1]: TypeError: '_Environ' object is not callable
2018-11-06T15:15:53.044895+00:00 app[web.1]: [2018-11-06 15:15:53 +0000] [10] [INFO] Worker exiting (pid: 10)
2018-11-06T15:15:53.084707+00:00 app[web.1]: [2018-11-06 15:15:53 +0000] [11] [ERROR] Exception in worker process
2018-11-06T15:15:53.084711+00:00 app[web.1]: Traceback (most recent call last):
2018-11-06T15:15:53.084713+00:00 app[web.1]: File "/app/.heroku/python/lib/python3.6/site-packages/gunicorn/arbiter.py", line 583, in spawn_worker
2018-11-06T15:15:53.084715+00:00 app[web.1]: worker.init_process()
2018-11-06T15:15:53.084720+00:00 app[web.1]: File "/app/.heroku/python/lib/python3.6/site-packages/gunicorn/workers/base.py", line 129, in init_process
2018-11-06T15:15:53.084722+00:00 app[web.1]: self.load_wsgi()
2018-11-06T15:15:53.084724+00:00 app[web.1]: File "/app/.heroku/python/lib/python3.6/site-packages/gunicorn/workers/base.py", line 138, in load_wsgi
2018-11-06T15:15:53.084726+00:00 app[web.1]: self.wsgi = self.app.wsgi()
2018-11-06T15:15:53.084727+00:00 app[web.1]: File "/app/.heroku/python/lib/python3.6/site-packages/gunicorn/app/base.py", line 67, in wsgi
2018-11-06T15:15:53.084729+00:00 app[web.1]: self.callable = self.load()
2018-11-06T15:15:53.084731+00:00 app[web.1]: File "/app/.heroku/python/lib/python3.6/site-packages/gunicorn/app/wsgiapp.py", line 52, in load
2018-11-06T15:15:53.084732+00:00 app[web.1]: return self.load_wsgiapp()
2018-11-06T15:15:53.084734+00:00 app[web.1]: File "/app/.heroku/python/lib/python3.6/site-packages/gunicorn/app/wsgiapp.py", line 41, in load_wsgiapp
2018-11-06T15:15:53.084735+00:00 app[web.1]: return util.import_app(self.app_uri)
2018-11-06T15:15:53.084737+00:00 app[web.1]: File "/app/.heroku/python/lib/python3.6/site-packages/gunicorn/util.py", line 350, in import_app
2018-11-06T15:15:53.084739+00:00 app[web.1]: __import__(module)
2018-11-06T15:15:53.084740+00:00 app[web.1]: File "/app/app.py", line 18, in <module>
2018-11-06T15:15:53.084742+00:00 app[web.1]: channel_secret = os.environ('LINE_CHANNEL_SECRET')
2018-11-06T15:15:53.084749+00:00 app[web.1]: TypeError: '_Environ' object is not callable
2018-11-06T15:15:53.086206+00:00 app[web.1]: [2018-11-06 15:15:53 +0000] [11] [INFO] Worker exiting (pid: 11)
2018-11-06T15:15:53.218885+00:00 app[web.1]: [2018-11-06 15:15:53 +0000] [4] [INFO] Shutting down: Master
2018-11-06T15:15:53.220781+00:00 app[web.1]: [2018-11-06 15:15:53 +0000] [4] [INFO] Reason: Worker failed to boot.
2018-11-06T15:15:53.374930+00:00 heroku[web.1]: Process exited with status 3
2018-11-06T15:15:53.392462+00:00 heroku[web.1]: State changed from up to crashed
2018-11-06T15:18:00.921009+00:00 heroku[router]: at=error code=H10 desc="App crashed" method=POST path="/callback" host=mybot.herokuapp.com request_id=0a9d9c86-7d65-495b-b51e-9ab7620539e8 fwd="203.104.146.155" dyno= connect= service= status=503 bytes= protocol=https

その他のファイルは以下のとおりです。

runtime.txt

python-3.6.6

requirements.txt

Flask==1.0.2
line-bot-sdk==1.8.0
gunicorn==19.9.0

Procfile

web: gunicorn app:app --log-file -

試したこと

他のチュートリアル（https://www.casleyconsulting.co.jp/blog/engineer/3028/とか）でも，うまく行きません

補足

前述のウェブページには載っていませんでしたが，push時にエラーが出たので，以下を実行しました。

heroku git:remote -a　【自分のappの名前】

Answer 1

括弧の形が違うようです。

channel_secret = os.environ('LINE_CHANNEL_SECRET')
↓
channel_secret = os.environ['LINE_CHANNEL_SECRET']

上のように修正して、試してみてください

Comments

[jhkifsj]

ありがとうございました！