Json Comment

A wrapper to JSON parsers allowing comments, multiline strings and trailing commas

Dependencies

• Python 3.3+
• TODO NEW ADDITIONS

Optional

• ujson 1.30+

Description

JSON Comment allows to parse JSON files or strings with:

• Single and Multi line comments
• Multi line data strings
• Trailing commas in objects and arrays, after the last item

This package works with any JSON parser which supports:

• load(fp, ...) to parse files
• loads(s, ...) to parse strings

by adding a preprocessor to these calls.

Comments

• #, ; and // are for single line comments
• /* and */ enclose multiline comments

Inline comments are not supported

Multiline strings

Any string can be multiline, even object keys.

• Multiline strings start and end with """, like in python
• The preprocessor merges all lines to a single JSON standard string
• A single trailing space per line is kept, if present
• New line is not kept. To hard code new lines in the string, use \\n

Custom Methods

File Load

loadf(path, *args, default = None, **kwargs)

Opens a JSON file with comments. Allows a default value if loading or parsing fails

File Save

dumpf(json_obj, path, *args, indent=4, **kwargs)

Saves a JSON file with indentation

Install

pip install jsoncomment

OR

• Download source
• python setup.py install

Usage

from jsoncomment import JsonComment

string = "[]"
json = JsonComment()
json_obj = json.loads(string)

Examples

Added in the /examples directory

Limitations

• #, ;, // and /* may be preceded only by whitespaces or tabs on the same line
• */ may be followed only by whitespaces or tabs on the same line
• The trailing comma must be the last character on the same line

Source

Source code available with MIT license on Bitbucket.

API

Added in top level __init__.py

How to read the API

API is split in:

* `User Interface` for common use
* `Developer Interface` exposing some internals that could be useful

For each item ( function or class ), there are 2 blocks of comments, above and below item definition:

* The top describes the return values
* The bottom describes the item and call variables

If call variables have defaults or use duck typing, every allowed value is described

Example:

# return_value
	# description
from .some_module import SomeClass
	# SomeClass description
# (
	# variable_1,
		# description
	# variable_2 = something,
		# description

		# = Default
			# description of default value ( something )
		# = something_2
			# description of alternate form ( duck typing )
# )

describes return_value = SomeClass(variable_1, variable_2 = current_value)

Contact

Gaspare Iengo @ email