Example 8-17 - Different output from expected

[CavalcanteLucas]

Hello,

Can someone please help me understand what am I doing wrong?
The example 8-17 shows this expected output:

But this is what I got instead:

I also tried that in the console session (using IPython v.7.29.0):

Is it something that might be related to different python versions (mine is 3.8.10)?
Sorry if this is outdated.

Hope to hear from you,
Kind regards

[CavalcanteLucas]

Oh, one must use python to open the session, not ipython. Apologies for the false alarm.