Again with the dynamic mandelbrot Python Holoviz Interactive Graphics Lagging in Google Colab but Working Fine in VSCode
I am trying to make it work in jupyterlite https://jupyter.org/try-jupyter/lab/index.html, it works well offline and it seem to work in panelite https://panelite.holoviz.org/lab/index.html too!
sadly, it doesn’t rerender on zoom with jupyterlite
jupyterlite:
panelite:
requirements for panelite:
%pip install hvplot
requirements for jupyterlite:
%pip install pyviz_comms
%pip install https://cdn.holoviz.org/panel/1.5.2/dist/wheels/bokeh-3.6.0-py3-none-any.whl
%pip install https://cdn.holoviz.org/panel/1.5.2/dist/wheels/panel-1.5.2-py3-none-any.whl
%pip install hvplot
%pip install param jupyter_bokeh
import panel as pn
from holoviews.streams import RangeXY
import holoviews as hv
import numpy as np
hv.extension("bokeh")
def mandel(x, y, max_iters):
"""
Given the real and imaginary parts of a complex number,
determine if it is a candidate for membership in the Mandelbrot
set given a fixed number of iterations.
"""
i = 0
c = complex(x,y)
z = 0.0j
for i in range(max_iters):
z = z*z + c
if (z.real*z.real + z.imag*z.imag) >= 4:
return i
return 255
def create_fractal(min_x, max_x, min_y, max_y, image, iters):
height = image.shape[0]
width = image.shape[1]
pixel_size_x = (max_x - min_x) / width
pixel_size_y = (max_y - min_y) / height
for x in range(width):
real = min_x + x * pixel_size_x
for y in range(height):
imag = min_y + y * pixel_size_y
color = mandel(real, imag, iters)
image[y, x] = color
return image
def get_fractal(x_range, y_range):
(x0, x1), (y0, y1) = x_range, y_range
image = np.zeros((600, 600), dtype=np.uint8)
return hv.Image(create_fractal(x0, x1, -y1, -y0, image, 200),
bounds=(x0, y0, x1, y1))
range_stream = RangeXY(x_range=(-1., 1.), y_range=(-1., 1.))
dmap = hv.DynamicMap(get_fractal,streams=[range_stream])
dmap_panel = pn.panel(dmap)
dmap_panel