[ Originally filed by Olivier Lê Thanh Duong as http://www.reinteract.org/trac/ticket/79 ]

It would be nice to have a pretty print for dict and list like ipython does 

04/02/09 14:13:46 changed by akaihola
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pprint.pformat() or pprint.pprint() might be useful for this.

04/02/09 17:45:30 changed by otaylor
====================================

I'd appreciate more detail about what is desired here - Reinteract already does something along the lines of pprint.format - see:

http://git.fishsoup.net/cgit/reinteract/tree/lib/reinteract/data_format.py

For very big lists and multi-dimension numpy arrays, you could imagine using a scrolling widget rather than dumping out a text representation, but obviously that's something that neither ipython nor pprint does.

04/04/09 11:38:39 changed by akaihola
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I assume olethanh would like Reinteract to do such formatting by default. Here's an example of what IPython does:

In [1]: range(25)
Out[1]: 
[0,
 1,
 2,
 3,
 4,
 5,
 6,
 7,
 8,
 9,
 10,
 11,
 12,
 13,
 14,
 15,
 16,
 17,
 18,
 19,
 20,
 21,
 22,
 23,
 24]

In [2]: dict.fromkeys(range(25))
Out[2]: 
{0: None,
 1: None,
 2: None,
 3: None,
 4: None,
 5: None,
 6: None,
 7: None,
 8: None,
 9: None,
 10: None,
 11: None,
 12: None,
 13: None,
 14: None,
 15: None,
 16: None,
 17: None,
 18: None,
 19: None,
 20: None,
 21: None,
 22: None,
 23: None,
 24: None}

Here's a worksheet for testing what Reinteract outputs by default and with data_format.format() plus pprint() output as a comparison:

from reinteract.data_format import format
from pprint import pprint

range(25)
dict.fromkeys(range(25)) 

print format(range(25))
print format(dict.fromkeys(range(25)))

pprint(range(25))
pprint(dict.fromkeys(range(25)))

04/04/09 15:21:40 changed by olethanh
=====================================

Yes I was thinking about having this behaviour by default. The manual way isn't easily discoverable and doing it each time you want to see the value of a variable seems a bit tedious.