python: implement generic "Run app" button #4557
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isabelizimm
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lang: python
theme: app builder
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Sep 23, 2024
This PR adds support for local Python application development for the following frameworks: * Streamlit * Dash * Gradio * FastAPI * Flask This is facilitated by a new extension: `positron-run-app`. Addresses #4557, #4555, #3023, #3027, #3024. https://github.com/user-attachments/assets/d72e5028-a8c9-4aab-b927-4413c4e74b24 ### QA notes 1. Open an application developed using one of the supported frameworks. 2. Run the relevant "Python: Run X App in Terminal" command. It should also be the default action if you click the run button in the editor menu. 3. It should create a terminal named after the framework, and automatically show the app in the Viewer pane once its ready. Here are example apps for all of the supported frameworks: #### Streamlit ```python import streamlit as st x = st.slider('x') st.write(x, 'squared is', x * x) ``` #### Dash ```python from dash import Dash, html app = Dash() app.layout = [html.Div(children='Hello World')] if __name__ == '__main__': app.run(debug=True) ``` #### Gradio ```python import gradio as gr def image_classifier(inp): return {'cat': 0.3, 'dog': 0.7} demo = gr.Interface(fn=image_classifier, inputs="image", outputs="label") demo.launch() ``` #### FastAPI ```python from fastapi import FastAPI app = FastAPI() @app.get("/") async def root(): return {"message": "Hello World"} ``` #### Flask ```python from flask import Flask app = Flask(__name__) @app.route("/") def hello_world(): return "<p>Hello, World!</p>" ``` ### Next steps: Workbench integration To support Workbench, we'll need to update `runApplication` to detect if we're in Workbench, and if so, find a free port and corresponding proxied URL (possibly related to #4274) and pass them both to `getTerminalOptions`.
Verified FixedTest scenario(s)Verified with FastAPI. Will cross check with other apps. Link(s) to TestRail test cases run or created: |
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Once the Positron Python extension has determined a user is in an app, there should be a "Run App" option (perhaps with a "Debug App" option as well) in the play button. Clicking this button should call the appropriate command for the app framework in a new terminal instance.
Related to #4555 #3023 #3025 #3024 #3027
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