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Copyright (c) 2015 Marc Brinkmann
Permission is hereby granted, free of charge, to any person obtaining a
copy of this software and associated documentation files (the "Software"),
to deal in the Software without restriction, including without limitation
the rights to use, copy, modify, merge, publish, distribute, sublicense,
and/or sell copies of the Software, and to permit persons to whom the
Software is furnished to do so, subject to the following conditions:
The above copyright notice and this permission notice shall be included in
all copies or substantial portions of the Software.
THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER
DEALINGS IN THE SOFTWARE.

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Metadata-Version: 2.1
Name: visitor
Version: 0.1.3
Summary: A tiny pythonic visitor implementation.
Home-page: http://github.com/mbr/visitor
Author: Marc Brinkmann
Author-email: git@marcbrinkmann.de
License: MIT
Classifier: Programming Language :: Python :: 2
Classifier: Programming Language :: Python :: 3
License-File: LICENSE
visitor
=======
A tiny library to facilitate `visitor
<https://en.wikipedia.org/wiki/Visitor_pattern>`_ implementation in Python
(which are slightly peculiar due to dynamic typing). In fact, it is so small,
you may just be better off copy & pasting the source straight into your
project...
Example use
-----------
A simple JSON-encoder:
.. code-block:: python
from visitor import Visitor
class JSONEncoder(Visitor):
def __init__(self):
self.indent = 0
def escape_str(self, s):
# note: this is not a good escape function, do not use this in
# production!
s = s.replace('\\', '\\\\')
s = s.replace('"', '\\"')
return '"' + s + '"'
def visit_list(self, node):
self.indent += 1
s = '[\n' + ' ' * self.indent
s += (',\n' + ' ' * self.indent).join(self.visit(item)
for item in node)
self.indent -= 1
s += '\n' + ' ' * self.indent + ']'
return s
def visit_str(self, node):
return self.escape_str(node)
def visit_int(self, node):
return str(node)
def visit_bool(self, node):
return 'true' if node else 'false'
def visit_dict(self, node):
self.indent += 1
s = '{\n' + ' ' * self.indent
s += (',\n' + ' ' * self.indent).join(
'{}: {}'.format(self.escape_str(key), self.visit(value))
for key, value in sorted(node.items())
)
self.indent -= 1
s += '\n' + ' ' * self.indent + '}'
return s
data = [
'List', 'of', 42, 'items', True, {
'sub1': 'some string',
'sub2': {
'sub2sub1': False,
'sub2sub2': 123,
}
}
]
print(JSONEncoder().visit(data))
Output::
[
"List",
"of",
42,
"items",
true,
{
"sub1": "some string",
"sub2": {
"sub2sub1": false,
"sub2sub2": 123
}
}
]

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visitor-0.1.3.dist-info/INSTALLER,sha256=zuuue4knoyJ-UwPPXg8fezS7VCrXJQrAP7zeNuwvFQg,4
visitor-0.1.3.dist-info/LICENSE,sha256=GE0eu2Xal62jZEfzwCjy_UiQuHTxexjAI84gDdlmOa8,1058
visitor-0.1.3.dist-info/METADATA,sha256=NgcAhkIjLNmG9mxobLPXaL0nuQGqBcy-9YAMk_5FNQA,2507
visitor-0.1.3.dist-info/RECORD,,
visitor-0.1.3.dist-info/WHEEL,sha256=PZUExdf71Ui_so67QXpySuHtCi3-J3wvF4ORK6k_S8U,91
visitor-0.1.3.dist-info/top_level.txt,sha256=YzMUOuikZNH_JrhCf_4ZZFsbtWgkdMoKlTJ4D0CvfP4,8
visitor/__init__.py,sha256=anRPAM2lnPjAly10qb6XaV4hfGZnF1MiE3v6qzRmuyw,2159
visitor/__pycache__/__init__.cpython-312.pyc,,

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Wheel-Version: 1.0
Generator: setuptools (75.6.0)
Root-Is-Purelib: true
Tag: py3-none-any

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visitor