# JsonSourceMap
Calculate JSON Pointers to each value within a JSON document along with the
line, column and character position for the start and end of that value. For
more information see: <https://github.com/open-alchemy/json-source-map/wiki>.
For example:
```bash
python -m pip install json_source_map
```
```Python
from json_source_map import calculate
print(calculate('{"foo": "bar"}'))
```
The above prints:
```Python
{
'': Entry(
value_start=Location(line=0, column=0, position=0),
value_end=Location(line=0, column=14, position=14),
key_start=None,
key_end=None,
),
'/foo': Entry(
value_start=Location(line=0, column=8, position=8),
value_end=Location(line=0, column=13, position=13),
key_start=Location(line=0, column=1, position=1),
key_end=Location(line=0, column=6, position=6),
),
}
```
Where:
- each key in the dictionary is a JSON path to an item,
- each value in the dictionarty contains the mapping of the item at the JSON
path which have the following properties:
- `value_start` is the start of the value,
- `value_end` is the end of the value,
- `key_start` is the start of the key (which is `None` at the root level and
for array items),
- `key_end` is the end of the key (which is `None` at the root level and for
array items) and
- each of the above have the following properties:
- `line` is the zero-indexed line position,
- `column` is the zero-indexed column position and
- `position` is the zero-indexed character position in the string
(independent of the line and column).
The following features have been implemented:
- support for primitive types (`strings`, `numbers`, `booleans` and `null`),
- support for structural types (`array` and `object`) and
- support for space, tab, carriage and return whitespace.
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JSON
