how to pretty-print Python dict with unicode?

Vlastimil Brom vlastimil.brom at gmail.com
Thu Aug 5 01:28:01 CEST 2010


2010/8/5 kj <no.email at please.post>:
>
> Is there a simple way to get Python to pretty-print a dict whose
> values contain Unicode?  (Of course, the goal here is that these
> printed values are human-readable.)
>
> If I run the following simple script:
>
> from pprint import pprint
> x = u'\u6c17\u304c\u9055\u3046'
> print '{%s: %s}' % (u'x', x)
> print {u'x': x}
> pprint({u'x': x})
>
> The first print statement produces perfectly readable Japanese,
> but the remaining statements both produce the line
>
> {u'x': u'\u6c17\u304c\u9055\u3046'}
>
> I've tried everything I can think of (including a lot of crazy
> stuff) short of re-writing pprint from scratch (which I think would
> be faster than grokking it and hacking at it).
>
> Isn't there an easier way to do this?
>
> Thanks!
>
> ~K
> --
> http://mail.python.org/mailman/listinfo/python-list
>

I am not sure it helps, others will probably offer more elegant suggestions,
but if the dict is one-dimensional (i.e. it doesn't contain any other
containers or mappings - dicts, lists etc., but only strings, numbers,
you can use a simple print with a string conversion in a loop or join
the dict to a single printable string.

Python 2.7 (r27:82525, Jul  4 2010, 09:01:59) [MSC v.1500 32 bit
(Intel)] on win32
Type "copyright", "credits" or "license()" for more information.
>>> d = {1: u'\u6c17\u304c\u9055\u3046', 2: u'\u6c17\u304c\u9055\u3046', 3: u'\u6c17\u304c\u9055\u3046', }
>>> for k, v in d.items(): print "%s: %s" % (k, v)

1: 気が違う
2: 気が違う
3: 気が違う
>>> for k, v in d.items(): print "%s: %s," % (k, v),

1: 気が違う, 2: 気が違う, 3: 気が違う,
>>>
>>> print "".join("%s: %s, " % (k, v) for k, v in d.iteritems())
1: 気が違う, 2: 気が違う, 3: 気が違う,
>>>

Or you can use python 3, where repr() behaves directly like you would
need (also for arbitrarily nested data structers, unlike the simple
approach above):

Python 3.1.1 (r311:74483, Aug 17 2009, 17:02:12) [MSC v.1500 32 bit
(Intel)] on win32
Type "copyright", "credits" or "license()" for more information.
>>> d = {1: '\u6c17\u304c\u9055\u3046', 2: '\u6c17\u304c\u9055\u3046', 3: '\u6c17\u304c\u9055\u3046', }
>>> d
{1: '気が違う', 2: '気が違う', 3: '気が違う'}
>>>

(It might be possible to replace the sys.stdout to use str() as needed
on python 2.x too, but I am not sure if it would be worth it.)

vbr



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