Python: Pretty Print in Jupyter Notebook

Question

I am trying to pretty print a dict in Jupyter Notebook.

I am using the following:

import pprint
stuff = ['spam', 'eggs', 'lumberjack', 'knights', 'ni']
stuff.insert(0, stuff[:])
pp = pprint.PrettyPrinter(indent=4)
pp.pprint(stuff)

However upon pressing shift+enter, no [out] cell appear (i.e. I can't see the pretty printed output)

Any idea why this is so/ what should I change in order to see the pretty printed output?

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Edit: Actually this is a python 2.7 problem - it works fine in 3.x. Have anyone tried it on python 2.7 and seen it work?

Sonny

The same code works fine for me. I am using Python 3.6 – Estrone

@Estrone Oh I see - I am using 2.7... Do you have any idea what would be the coreect syntax in 2.7 ? – Sonny

I tested your code on try.jupyter.org and it did show output. – Batrachian

you could try outputting html, as pretty as you wish: #25698948 – Elijaheliminate

@jimbasquiat Yes it works on 2.7 – Soubrette

Also working here. Cannot reproduce – Twyla

Answer 1

Whatever you develop is correct. The only possible reason could be, Jupyter Notebook is unable to connect to the server. If you see connecting to Kernal/server like the image below in the toolbar, try to refresh the connection or reload the page.

I used the same code and I am able to see the output. check the image below.

Triolein

Answer 2

I had this problem with Python 3, in my case solved removing an AD block extension.. somehow it was blocking the AJAX request that set the output..

Amadaamadas

Answer 3

The title is generic to more than dict in Jupyter, so i give a generic answer.

When printing, change this

print(longValue, nextValue)

to this (have to try with other values than 30)

space = (30-len(longValue)*" "
print(longValue,space,nextValue)

That will change this

Into this

Arria

Easier to let Python calculate the spaces for you with: print("{:30s} {:s} ".format(longVal, nextVal)) – Ectogenous