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 INFO interface: output: Box 'archlinux-x86_64' could not be found. Attempting to find and install...
 INFO interface: output: ==> build: Box 'archlinux-x86_64' could not be found. Attempting to find and install...
==> build: Box 'archlinux-x86_64' could not be found. Attempting to find and install...
 INFO interface: detail: Box Provider: virtualbox
 INFO interface: detail:     build: Box Provider: virtualbox
      build: Box Provider: virtualbox
 INFO interface: detail: Box Version: >= 0
 INFO interface: detail:     build: Box Version: >= 0
      build: Box Version: >= 0
 INFO runner: Preparing hooks for middleware sequence...

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============== GOOD ===============

.. ipython:: python

    from baron import parse, dumps

    source_code_string = "a = 1"

    ast = parse(source_code_string)
    generated_source_code = dumps(ast)

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Use vagrant to develop baron and redbaron

Copy the files bootstrap.sh, Vagrantfile and test_baron.sh. In the same directory:

git clone https://github.com/Psycojoker/baron.git
git clone https://github.com/Psycojoker/redbaron.git

vagrant up

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class MyClass:
    def __init__(self):
        self.errors = []
        self.warnings = []

    def apply(self, function, *args):
        result, self.errors, self.warnings = function(*args, errors=self.errors, warnings=self.warnings)
        return result

    def applicative_functor_style(self, ast):

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from .render import RenderWalker


def dumps(tree):
    return Dumper().dump(tree)


class Dumper(RenderWalker):
    def on_constant(self, constant, pos, key):
        self.dump += constant

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VAGRANTFILE_API_VERSION = "2"

Vagrant.configure(VAGRANTFILE_API_VERSION) do |config|
    config.vm.define :raspberry do |box|
        box.vm.box = "precise64"
        box.vm.box_url = "http://files.vagrantup.com/precise64.box"
        box.vm.network :private_network, ip: "192.168.42.12"

        box.vm.provision :shell, :path => "bootstrap_prod.sh"

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"comparison": [
  ("key",        "first",             True),
  ("formatting", "first_formatting",  True),
  ("key",        "middle_left_formatting",  "complex"), # not ou is
  ("formatting",       "middle_formatting", "complex"),
  ("key",        "middle_right_formatting", "complex"), # in ou not
  ("key",        "value",             "no_complex"),
  ("formatting", "second_formatting", True),
  ("key",        "second",            True),

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============================================== FAILURES ==============================================
__________________________________ test_backslash_not_in_formatting __________________________________

    def test_backslash_not_in_formatting():
>       check_dumps("if a not \\\n      in b: pass\n")

tests/test_dumper.py:527:
_ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _

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>>> tokenize("from future import feature")
[('NAME', 'f'), ('NAME', 'r'), ('NAME', 'o'), ('NAME', 'm'), ('SPACE', ' '), ('NAME', 'f'), ('NAME', 'u'), ('NAME', 't'), ('NAME', 'u'), ('NAME', 'r'), ('NAME', 'e'), ('SPACE', ' '), ('NAME', 'i'), ('NAME', 'm'), ('NAME', 'p'), ('NAME', 'o'), ('NAME', 'r'), ('NAME', 't'), ('SPACE', ' '), ('NAME', 'f'), ('NAME', 'e'), ('NAME', 'a'), ('NAME', 't'), ('NAME', 'u'), ('NAME', 'r'), ('NAME', 'e'), ('ENDMARKER', ''), None]

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# 3.2

>>> open("test_oauth.py", "r").read()[:30]
'\xef\xbb\xbf# -*- coding: utf-8 -*-\n\n""'

>>> import baron.helpers
>>> baron.helpers.show(open('test_oauth.py').read())
Traceback (most recent call last):
  File "<stdin>", line 1, in <module>
  File "/vagrant/baron/baron/helpers.py", line 7, in show