readme for demo

examples/streamlit/README.md

@@ -0,0 +1,23 @@
+Streamlit demo
+==============
+
+Upload to Jamsocket:
+
+```bash
+npx jamsocket@latest service create my-streamlit-demo
+npx jamsocket@latest service push my-streamlit-demo -f ./Dockerfile
+```
+
+Spawn an instance of the service:
+
+```bash
+npx jamsocket@latest spawn my-streamlit-demo
+```
+
+Open the "ready" URL in your browser.
+
+Then, upload a streamlit app:
+
+```bash
+curl -X POST --data-binary @app.py https://<result of spawn>/_frag/upload/app.py
+```

examples/streamlit/app.py

@@ -1,35 +1,7 @@
 import streamlit as st
-import numpy as np
-import matplotlib.pyplot as plt
-
-def mandelbrot(c, max_iter):
-    z = c
-    for n in range(max_iter):
-        if abs(z) > 2:
-            return n
-        z = z*z + c
-    return max_iter
-
-def draw_mandelbrot(xmin,xmax,ymin,ymax,width,height,max_iter):
-    r1 = np.linspace(xmin, xmax, width)
-    r2 = np.linspace(ymin, ymax, height)
-    return (r1,r2,np.array([[mandelbrot(complex(r, i),max_iter) for r in r1] for i in r2]))
 
 def main():
-    st.title('Mandelbrot Explorer')
-
-    # Set up the parameters
-    xmin = st.sidebar.slider('xmin', -2.0, 0.5, -2.0)
-    xmax = st.sidebar.slider('xmax', -2.0, 0.5, 0.5)
-    ymin = st.sidebar.slider('ymin', -1.5, 1.5, -1.5)
-    ymax = st.sidebar.slider('ymax', -1.5, 1.5, 1.5)
-    width = st.sidebar.slider('width', 100, 1000, 500)
-    height = st.sidebar.slider('height', 100, 1000, 500)
-    max_iter = st.sidebar.slider('max_iter', 1, 1000, 256)
-
-    # Draw the mandelbrot set
-    d = draw_mandelbrot(xmin,xmax,ymin,ymax,width,height,max_iter)
-    st.pyplot(plt.imshow(d[2], extent=(xmin, xmax, ymin, ymax)))
+    st.title('Hello World!')
 
 if __name__ == "__main__":
-    main()
+    main()