CoCalc Blog

How do I start a Jupyter kernel in a SageMath Worksheet?

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For a quick reminder, sample code is available for opening an Anaconda3 session. In the Sage worksheet toolbar, select Modes > Jupyter bridge.

Use the jupyter command to launch any installed Jupyter kernel from a Sage worksheet

py3 = jupyter("python3")

After that, any cell that begins with %py3 will send statements to the Python3 kernel that you just started. If you want to draw graphics, there is no need to call %matplotlib inline.

%py3
print(42)

import numpy as np; import pylab as plt
x = np.linspace(0, 3*np.pi, 500)
plt.plot(x, np.sin(x**2))
plt.show()

You can set the default mode to be your Jupyter kernel for all cells in the worksheet: after putting the following in a cell, click the “restart” button, and you have an anaconda worksheet.

%auto
anaconda3 = jupyter('anaconda3')
%default_mode anaconda3

Each call to jupyter() launches its own Jupyter kernel, so you can have more than one instance of the same kernel type in the same worksheet session.

p1 = jupyter('python3')
p2 = jupyter('python3')
p1('a = 5')
p2('a = 10')
p1('print(a)')   # prints 5
p2('print(a)')   # prints 10
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