Not able to display altair charts in jupyter notebook

Question

I am not able to display the charts on jupyter notebook. The same code displays on chrome in one laptop but does not work on chrome on other laptop.

I do not see any error or even a empty plot when I execute the code but get alt.Chart(...) in the output.

The version of altair and vega etc are same on both the laptops.

Answer 1

If it works in one notebook and not another, there are a couple possibilities for what is going on:

1. your notebooks are connected to different kernels with different versions of Altair and/or its dependencies installed. Run the following

   import sys print(sys.executable)

   to see if you're using the same Python executable in your environments. If the results are different, you can use Kernel -> Change Kernel in the Jupyter notebook menu to change to a kernel with a working Altair version.

2. If that's not the case, then it is likely that you have inadvertently enabled a different renderer in one of the notebooks, for example by running alt.renderers.enable('notebook') . In Altair 4.0, the default renderer should work out-of-the-box in both Jupyter notebook and JupyterLab. Either restart your kernel or run alt.renderers.enable('default') to restore the default.

3. The behavior above can happen if you have too old a version of IPython installed. See If the notebook displays on one laptop and not the other, it may be that the broken one has too old a version of IPython installed. See https://altair-viz.github.io/user_guide/troubleshooting.html#notebook-textual-chart-representation for more information on what to upgrade.

See Altair's Display Troubleshooting guide for more information.

Answer 2

对于 '4.1.0' 的 'altair' 版本，'3.4.0' 的 'vega' 版本只需执行alt.renderers.enable('default')而不是alt.renderers.enable('notebook')