Heroku 应用程序成功部署，但在加载站点时收到应用程序错误

Question

消息是应用程序已成功部署，但当我加载应用程序时显示此错误：

An error occurred in the application and your page could not be served. If you are the application owner, check your logs for details. You can do this from the Heroku CLI with the command

我的日志显示了一些错误，但我做错了什么？

运行时：

$ heroku logs -a disastresponse --tail

这是 output：

2022-02-11T04:06:42.642514+00:00 app[web.1]: File "/app/.heroku/python/lib/python3.9/importlib/__init__.py", line 127, in import_module
2022-02-11T04:06:42.642515+00:00 app[web.1]: return _bootstrap._gcd_import(name[level:], package, level)
2022-02-11T04:06:42.642516+00:00 app[web.1]: File "<frozen importlib._bootstrap>", line 1030, in _gcd_import
2022-02-11T04:06:42.642516+00:00 app[web.1]: File "<frozen importlib._bootstrap>", line 1007, in _find_and_load
2022-02-11T04:06:42.642516+00:00 app[web.1]: File "<frozen importlib._bootstrap>", line 984, in _find_and_load_unlocked
2022-02-11T04:06:42.642517+00:00 app[web.1]: ModuleNotFoundError: No module named 'app'
2022-02-11T04:06:42.642579+00:00 app[web.1]: [2022-02-11 04:06:42 +0000] [10] [INFO] Worker exiting (pid: 10)
2022-02-11T04:06:42.676775+00:00 app[web.1]: [2022-02-11 04:06:42 +0000] [4] [WARNING] Worker with pid 10 was terminated due to signal 15
2022-02-11T04:06:42.776963+00:00 app[web.1]: [2022-02-11 04:06:42 +0000] [4] [INFO] Shutting down: Master
2022-02-11T04:06:42.777013+00:00 app[web.1]: [2022-02-11 04:06:42 +0000] [4] [INFO] Reason: Worker failed to boot.

简介：

web: gunicorn app:run

要求.txt

flask==2.0.2
gunicorn==20.1.0
joblib==1.1.0
nltk==3.6.5
plotly==5.1.0
numpy==1.22.2
pandas==1.4.0
pip==21.2.4
regex==2021.8.3
scikit-learn==1.0.1
scipy==1.7.3
sqlalchemy==1.4.27

这是我所有的 run.py 进口：

import json
import plotly
import pandas as pd
import numpy as np
import os

from nltk.stem import WordNetLemmatizer
from nltk.tokenize import word_tokenize

from flask import Flask
from flask import render_template, request, jsonify
from plotly.graph_objs import Bar
# from sklearn.externals import joblib
import joblib
from sqlalchemy import create_engine

app = Flask(__name__)

我错过了什么吗？

Answer 1

你的 Gunicorn 论点是倒退的。

由于您的应用程序 object 名为app并且位于名为run.py的文件中，因此您应该像这样启动 Gunicorn：

web: gunicorn run:app