Issue
I have two python files.
server1.py
from flask import Flask
app = Flask(__name__)
@app.route('/')
def home():
return "Hello world from server 1."
if __name__ == "__main__":
app.run(port=3000)
server2.py
from flask import Flask
app = Flask(__name__)
@app.route('/')
def home():
return "Hello from server 2."
if __name__ == "__main__":
app.run(port=4000)
Now, I need to run these two servers at the same time using a bash script.
I have tried this in my bash script.
python3 server1.py && python3 server2.py
When I run this bash script, it runs the server1.py file only when I quit server 1 it runs the server2.py
Output of my bash script:
* Serving Flask app 'server1' (lazy loading)
* Environment: production
WARNING: This is a development server. Do not use it in a production deployment.
Use a production WSGI server instead.
* Debug mode: off
* Running on http://127.0.0.1:3000 (Press CTRL+C to quit)
^C * Serving Flask app 'server2' (lazy loading)
* Environment: production
WARNING: This is a development server. Do not use it in a production deployment.
Use a production WSGI server instead.
* Debug mode: off
* Running on http://127.0.0.1:4000 (Press CTRL+C to quit)
I think its not possible to run two flask servers same time in a single terminal.
Is there any way using bash we can open a new terminal and run the server2.py file on that terminal? for some reasons, I need to run both flask servers same time.
Solution
Specifying && tells Bash to wait for the first command to successfully exit before running the second one.
A better solution might be first_command & second_command &.
This will send both scripts to run in the background at the same time and free up your TTY.
I wrote a post about Linux command chaining a few years ago, you might find it beneficial given your requirement.
You can read it here
Answered By – Orel Fichman
This Answer collected from stackoverflow, is licensed under cc by-sa 2.5 , cc by-sa 3.0 and cc by-sa 4.0