generalized pretty print based on Wadler's paper
Python’s standard pretty print library (pprint) doesn’t support user defined class. Once I wanted to print Python’s AST prettier, however it’s not possible to use “pprint” for the purpose.
What is it?
This library is an implementation in Python of “A prettier print” introduced by Philip Wadler.
The algorithm was also implemented in Ruby’s standard library: prettyprint.rb.
The purpose of this library is to give prettyprint ability on your class. In examples/show_ast.py you can see such examples. Here are small samples.
>>> from prettier import * >>> docs = [Text("1. abc"), Text("2. abc"), Text("3. abc")] # fill given space >>> print(pretty(40, fill(docs))) 1. abc 2. abc 3. abc >>> print(pretty(13, fill(docs))) 1. abc 2. abc 3. abc >>> print(pretty(8, fill(docs))) 1. abc 2. abc 3. abc # horizontal only >>> print(pretty(1, spread(docs))) 1. abc 2. abc 3. abc # vertical only >>> print(pretty(100, stack(docs))) 1. abc 2. abc 3. abc # when there isn't enough space to put horizontal, put vertical >>> print(pretty(20, stack_or_spread(docs))) 1. abc 2. abc 3. abc >>> print(pretty(13, stack_or_spread(docs))) 1. abc 2. abc 3. abc # when there isn't enough space to put horizontal, use indent >>> print(pretty(10, can_break_with_nest(docs))) 1. abc 2. abc 3. abc
$ easy_install prettier
Read the doctest please.
- Relative file(“README.rst”) fail on PyPI server. Fixed the bug in setup.py.
- Because I didn’t write MANIFEST.in, README.rst wasn’t included in source distribution. Add it.
- PEP8 discouraged underscores in module name. Renamed it.
- Because I did
$ python setup.py sdist bdist bdist_egg upload, there comes
"dumb" binary. Removed
- first release
- Make a function
pprint(obj)which work like standard
When the goal is achived the version goes 1.0.
For developer(include me)
Here is the repository: https://bitbucket.org/nishio/prettierprint
Don’t forget to run test and confirm tests cover all code:
$ coverage run prettier/__init__.py && coverage html
Don’t forget to test README.rst is valid:
$ rst2html.py README.rst > README.html
When you relaese new version, don’t put
$ python setup.py sdist bdist_egg upload
Same as Python 3.0.
- Takayuki SHIMIZUKAWA <shimizukawa at gmail com>
- Atsushi Odagiri <aodagx at gmail com>
- yutaka matsubara <yutaka matsubara at gmail com>
NISHIO Hirokazu <nishio (dot) hirokazu (at) gmail (dot) com>
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|Filename, size & hash SHA256 hash help||File type||Python version||Upload date|
|prettier-0.92-py2.6.egg (17.6 kB) Copy SHA256 hash SHA256||Egg||2.6||Sep 2, 2010|
|prettier-0.92.tar.gz (6.0 kB) Copy SHA256 hash SHA256||Source||None||Sep 2, 2010|