Exposing Python Script as an API or Service - python-3.x

Question

I am using Python for quite a while. I have integrated my python code with java UI as well and is working fine.
Now here comes the tricky part.
I need to expose my python script as an API so that it can be executed from anywhere (Any other suggestions to achieve this are also welcomed) without depending on one particular machine where the python scripts are present.
My initial basic code snippet is given below for your reference :
import .....
def main(id1, id2):
do something ........
call sub-function(id1, id2)
do something ........
if __name__ == '__main__':
id1 = sys.argv[1] #Getting first argument from Java UI.
id1 = sys.argv[1] #Getting first argument from Java UI.
main(id1, id2) #Calling Main function using two IDs as arguments.
This code is working fine as long as I point to the script path in my system from java. But I need to change this code structure to expose it as an API or Service. I do not have any idea on how to achieve this. With help of few articles, I tried my luck with Flask framework. But I am not sure how to call main function using flask by supplying arguments.
import .....
from flask import Flask
app = Flask(__name__)
#app.route("/")
def main():
do something ........
id1 = app.config.get['ID1']
id2 = app.config.get['ID2']
call sub-function(id1, id2)
do something ........
if __name__ == '__main__':
#For simplicity I supplied the arguments' values manually instead of getting it from java.
app.config['ID1'] = 101
app.config['ID2'] = 2
app.run(debug=True)
#Commented out calling main function since app.run() will take care
#main(id1, id2) #Calling Main function using two IDs as arguments.
When I execute this and goes to default web address (http://127.0.0.1:5000), I am getting the below error
TypeError: 'builtin_function_or_method' object is not subscriptable
Traceback (most recent call last) File
"C:\Users\user_name\Anaconda3\lib\site-packages\flask\app.py", line
1997, in call return self.wsgi_app(environ, start_response) File
"C:\Users\user_name\Anaconda3\lib\site-packages\flask\app.py", line
1985, in wsgi_app response = self.handle_exception(e) File
"C:\Users\user_name\Anaconda3\lib\site-packages\flask\app.py", line
1540, in handle_exception reraise(exc_type, exc_value, tb) File
"C:\Users\user_name\Anaconda3\lib\site-packages\flask_compat.py",
line 33, in reraise raise value File
"C:\Users\user_name\Anaconda3\lib\site-packages\flask\app.py", line
1982, in wsgi_app response = self.full_dispatch_request() File
"C:\Users\user_name\Anaconda3\lib\site-packages\flask\app.py", line
1614, in full_dispatch_request rv = self.handle_user_exception(e) File
"C:\Users\user_name\Anaconda3\lib\site-packages\flask\app.py", line
1517, in handle_user_exception reraise(exc_type, exc_value, tb) File
"C:\Users\user_name\Anaconda3\lib\site-packages\flask_compat.py",
line 33, in reraise raise value File
"C:\Users\user_name\Anaconda3\lib\site-packages\flask\app.py", line
1612, in full_dispatch_request rv = self.dispatch_request() File
"C:\Users\user_name\Anaconda3\lib\site-packages\flask\app.py", line
1598, in dispatch_request return
self.view_functionsrule.endpoint File
"C:\Users\user_name\Main_Script.py", line 29, in main id1 =
app.config.get['ID1'] TypeError: 'builtin_function_or_method' object
is not subscriptable The debugger caught an exception in your WSGI
application. You can now look at the traceback which led to the error.
To switch between the interactive traceback and the plaintext one, you
can click on the "Traceback" headline. From the text traceback you can
also create a paste of it. For code execution mouse-over the frame you
want to debug and click on the console icon on the right side.
You can execute arbitrary Python code in the stack frames and there
are some extra helpers available for introspection:
dump() shows all variables in the frame dump(obj) dumps all that's
known about the object
Can anyone please let me know how to resolve this and how to execute this script from any machine by exposing it as an API or service.

Answer 1

As I understand you are looking to remotely call the Python function and pass arguments into it and get back the result.
For example:
#app.route('/<string:idOne>/<string:idTwo>')
def main(idOne,idTwo):
do something
return something
Now you can just make a HTTP GET request.
For example:
http://127.0.0.1:5000/myFirstArg/mySecondArg