How to Change Port in Flask app
Last Updated :
16 Nov, 2022
In this article, we will learn to change the port of a Flask application.
The default port for the Flask application is 5000. So we can access our application at the below URL.
http://127.0.0.1:5000/
We may want to change the port may be because the default port is already occupied. To do that we just need to provide the port while running the Flask application. We can use the below command to run the Flask application with a given port.
if __name__ == ‘__main__’:
app.run(debug=True, port=port_number)
In this example, we will be using a sample flask application that returns a text when we hit the root URL.
helloworld.py
Python3
from flask import Flask
app = Flask(__name__)
@app .route( "/" )
def hello_world():
return "<p>Hello, World!</p>"
if __name__ = = '__main__' :
app.run(debug = True , port = 8001 )
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Output:
We are running the flask application on port 8001.
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