我试图通过 colab 烧瓶。以下是我在谷歌Colab上的代码：
from flask import Flask
!pip install flask_ngrok
from flask_ngrok import run_with_ngrok
app = Flask(__name__)
run_with_ngrok(app)
@app.route("/")
def hello():
return "Hello World!"
if __name__ == '__main__':
app.run()
它来自这个例子（顺便说一句，这个笔记本本身有一个不同的模块错误），但我不断得到
Exception in thread Thread-11:
Traceback (most recent call last):
File "/usr/local/lib/python3.10/dist-packages/urllib3/connection.py", line 174, in _new_conn
conn = connection.create_connection(
File "/usr/local/lib/python3.10/dist-packages/urllib3/util/connection.py", line 95, in create_connection
raise err
File "/usr/local/lib/python3.10/dist-packages/urllib3/util/connection.py", line 85, in create_connection
sock.connect(sa)
ConnectionRefusedError: [Errno 111] Connection refused
During handling of the above exception, another exception occurred:
Traceback …