I'm guessing here a little bit, but it looks like the author expects you to run this code in a jupyter notebook, rather than in an ipython interactive console.
The jupyter and ipython projects are related (the same?) which can cause some confusion, but if you run the code you shared in a jupyter lab environment, then the SVG should display. As an example, you should be able to view the expected SVG in the following google colab book: https://colab.research.google.com/drive/10KL9mV92L8yPe_5wL089C-m6i0N8ct7Q?usp=sharing Steve On Tue, Apr 13, 2021 at 3:12 PM Peng Yu <pengyu...@gmail.com> wrote: > Hi, > > https://www.fuzzingbook.org/html/Grammars.html > > I am trying to follow an example on the above page. But it does not > show a figure. Could anybody let me know how to display the figure? > > $ ipython3 > Python 3.8.0 (v3.8.0:fa919fdf25, Oct 14 2019, 10:23:27) > Type 'copyright', 'credits' or 'license' for more information > IPython 7.22.0 -- An enhanced Interactive Python. Type '?' for help. > > [ins] In [1]: from fuzzingbook.Grammars import * > > [ins] In [2]: from IPython.display import SVG, display > > [ins] In [3]: > SVG(show_diagram(syntax_diagram_expr(EXPR_GRAMMAR['<term>'][0]))) > Out[3]: <IPython.core.display.SVG object> > > -- > Regards, > Peng > -- > https://mail.python.org/mailman/listinfo/python-list > -- https://mail.python.org/mailman/listinfo/python-list
