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--- user:hof:pyeditor [2024-02-28 18:37] – [First try: bottom.ch] hof
+++ user:hof:pyeditor [2026-04-24 14:29] (aktuell) – hof
@@ Zeile 1: / Zeile 1: @@
-# First try: bottom.ch
+# Bottom Python Editor
-With iframe on bottom.ch/ksr/py/embed.html, which is based on pyodide and codemirror.
+Bottom Editor offers a standalone editor version at [[https://bottom.ch/editor/]] and a web component embeddable as normal HTML elements after loading the module once. See the [[https://bottom.ch/editor/stable/doc/|public documentation]] for all options.
+Also see [[~kara]] for a Kara shim on top of bottom-editor.
+## Basic Usage
+### Direct HTML
+Requires HTML-authoring (which may be a security risk with broad authorship).
+Within Dokuwiki, the HTML needs to be embedded into `<html>` tags for verbatim HTML.
 <code html>
-<html><iframe frameborder="0" width="100%" allow="clipboard-write" src="https://tkilla77.github.io/python_editor_wasm/embed.html?autorun&code=print%28%27Hello%2C+dokuwiki%21%27%29"></iframe></html></code>
+<!-- Include the script once (or from a DokuWiki plugin, or from userscripts). -->
+<html><script type="module" src="https://bottom.ch/editor/stable/bottom-editor.js"></script></html>
-<html><iframe frameborder="0" width="100%" allow="clipboard-write" src="https://tkilla77.github.io/python_editor_wasm/embed.html?autorun&code=print%28%27Hello%2C+dokuwiki%21%27%29"></iframe></html>
+<!-- Include a custom component in HTML. Use height, min-height, max-height to control the size. -->
+<!-- Leading empty lines will be dropped. -->
+<html><bottom-editor style="min-height: 6lh;" autorun>
+print(42)
+</bottom-editor></html>
+</code>
+### With Plugin
+To avoid needing raw trusted HTML access, install the [[https://www.dokuwiki.org/plugin:bottomeditor|bottomeditor plugin]] and create editors without `<html>`:
+<code html>
+<bottom-editor style="min-height: 6lh;" autorun>
+print(42)
+</bottom-editor>
+</code>
+## Shared Sessions
+By default, all editors on a page share a single python runtime. Functions defined in one execution are available in all editors afterwards, similar to jupyter notebooks. If you want an editor to have a separate python runtime, use the `session` attribute:
+<code html>
+<bottom-editor session="one" autorun>
+def greet(name):
+    print(f'Hi, {name}!')
+</bottom-editor>
+<bottom-editor session="one" autorun>
+greet('Harry') # works
+</bottom-editor>
+<bottom-editor session="two" autorun>
+greet('Harry') # fails
+</bottom-editor>
+</code>
+<bottom-editor session="one" autorun>
+def greet(name):
+    print(f'Hi, {name}!')
+</bottom-editor>
+<bottom-editor session="one" autorun>
+greet('Harry') # works
+</bottom-editor>
+<bottom-editor session="two" autorun>
+greet('Harry') # fails
+</bottom-editor>
+## Turtle
+Standard Python turtle with a small canvas. Use `layout="split"` to have both canvas and console.
+<code html>
+<bottom-editor layout="canvas" autorun id="turtle">
+import turtle
+t = turtle.Turtle()
+t.speed(9)
+colors = ['red', 'orange', 'gold', 'green', 'blue', 'purple']
+for i in range(90):
+    t.pencolor(colors[i % len(colors)])
+    t.forward(i * 0.5)
+    t.left(59)
+</bottom-editor>
+</code>
+<bottom-editor layout="canvas" autorun id="turtle">
+import turtle
+t = turtle.Turtle()
+t.speed(9)
+colors = ['red', 'orange', 'gold', 'green', 'blue', 'purple']
+for i in range(90):
+    t.pencolor(colors[i % len(colors)])
+    t.forward(i * 0.5)
+    t.left(59)
+</bottom-editor>
+## Matplotlib
+`plt.show()` renders to the canvas.
+<code html>
+<bottom-editor layout="canvas" autorun id="matplotlib">
+# Load packages from within python using micropip
+import micropip
+await micropip.install('matplotlib')
+import matplotlib.pyplot as plt
+import math
+x = [i * 0.1 for i in range(63)]
+plt.figure(figsize=(5, 4))
+plt.plot(x, [math.sin(v) for v in x], label='sin')
+plt.plot(x, [math.cos(v) for v in x], label='cos')
+plt.legend()
+plt.title('Trigonometric functions')
+plt.tight_layout()
+plt.show()
+</bottom-editor>
+</code>
+<bottom-editor layout="canvas" autorun id="matplot">
+# Load packages from within python using micropip
+import micropip
+await micropip.install('matplotlib')
+import matplotlib.pyplot as plt
+import math
+x = [i * 0.1 for i in range(63)]
+plt.figure(figsize=(5, 4))
+plt.plot(x, [math.sin(v) for v in x], label='sin')
+plt.plot(x, [math.cos(v) for v in x], label='cos')
+plt.legend()
+plt.title('Trigonometric functions')
+plt.tight_layout()
+plt.show()
+</bottom-editor>
+## OpenCV
+`cv2.imshow()` renders to the canvas.
+<code html>
+<bottom-editor layout="canvas" autorun id="opencv">
+# Load packages from within python using micropip
+import micropip
+await micropip.install('numpy')
+await micropip.install('opencv-python')
+import numpy as np
+import cv2
+# Gradient image with a circle
+img = np.zeros((300, 300, 3), dtype=np.uint8)
+for y in range(300):
+    for x in range(300):
+        img[y, x] = [x * 255 // 300, y * 255 // 300, 128]
+cv2.circle(img, (150, 150), 80, (255, 255, 255), 3)
+cv2.putText(img, 'OpenCV', (75, 160), cv2.FONT_HERSHEY_SIMPLEX, 1, (255,255,255), 2)
+cv2.imshow('result', img)
+</bottom-editor>
+</code>
+<bottom-editor layout="canvas" autorun id="opencv">
+# Load packages from within python using micropip
+import micropip
+await micropip.install('numpy')
+await micropip.install('opencv-python')
+import numpy as np
+import cv2
+# Gradient image with a circle
+img = np.zeros((300, 300, 3), dtype=np.uint8)
+for y in range(300):
+    for x in range(300):
+        img[y, x] = [x * 255 // 300, y * 255 // 300, 128]
+cv2.circle(img, (150, 150), 80, (255, 255, 255), 3)
+cv2.putText(img, 'OpenCV', (75, 160), cv2.FONT_HERSHEY_SIMPLEX, 1, (255,255,255), 2)
+cv2.imshow('result', img)
+</bottom-editor>
+## Installing files
+You can install files from an URL (with CORS headers if from a different domain!):
+<code html>
+<bottom-editor zip='https://bottom.ch/ksr/py/files/2m.zip' id="zip">
+with open('gemeinden.csv', 'r') as infile:
+    for line in infile:
+        tokens = line.split(',')
+        town = tokens[0]
+        if town == 'Romanshorn':
+            print(f'Romanshorn hat {tokens[2]} Einwohner')
+</bottom-editor>
+</code>
+<bottom-editor zip='https://bottom.ch/ksr/py/files/2m.zip' id="zip">
+with open('gemeinden.csv', 'r') as infile:
+    for line in infile:
+        tokens = line.split(',')
+        town = tokens[0]
+        if town == 'Romanshorn':
+            print(f'Romanshorn hat {tokens[2]} Einwohner')
+</bottom-editor>
+## Exercises
+<code html>
+<bottom-exercise id="sum-to_n">
+            Write a function <tt>sum_to(n)</tt> that returns
+            <tt>1 + 2 + &hellip; + n</tt>. Return <tt>0</tt> for
+            <tt>n &le; 0</tt>.
+        <script type="text/x-starter">
+def sum_to(n):
+    pass
+        </script>
+        <script type="text/x-test">
+assert sum_to(5) == 15, "sum_to(5) should be 15"
+assert sum_to(1) == 1, "sum_to(1) should be 1"
+assert sum_to(0) == 0, "sum_to(0) should be 0"
+        </script>
+        <script type="text/x-solution">
+def sum_to(n):
+    return sum(range(n+1))
+        </script>
+</bottom-exercise>
+</code>
+<bottom-exercise id="sum-to_n">
+            Write a function <tt>sum_to(n)</tt> that returns
+            <tt>1 + 2 + &hellip; + n</tt>. Return <tt>0</tt> for
+            <tt>n &le; 0</tt>.
+        <script type="text/x-starter">
+def sum_to(n):
+    pass
+        </script>
+        <script type="text/x-test">
+assert sum_to(5) == 15, "sum_to(5) should be 15"
+assert sum_to(1) == 1, "sum_to(1) should be 1"
+assert sum_to(0) == 0, "sum_to(0) should be 0"
+        </script>
+        <script type="text/x-solution">
+def sum_to(n):
+    return sum(range(n+1))
+        </script>
+</bottom-exercise>
+## Persistence
+Editors or excercises with an `id` attribute store the current state in the browser's local storage. If enabled, user's can opt to store a copy on Google Drive or Microsoft OneDrive.
+<code html>
+<bottom-editor style="min-height: 6lh;" id="storage-42">
+print(42)
+</bottom-editor>
+</code>
-# Second try: JupyterLite
-Also based on pyodide, but with jupyter support all around.
+<bottom-editor style="min-height: 6lh;" id="storage-42">
+print(42)
+</bottom-editor>
-<html><iframe
-  src="https://jupyterlite.github.io/demo/repl/index.html"
-  width="100%"
-  height="500px"></iframe></html>