json

Created: February 03, 2019

JSON files are a collection of comma-separated key-value pairs. "key": VALUE,
JSON starts and ends with curly brackets. { JSON_HERE }
Whitespace does not matter.
Keys are always strings.
Keys should be unique. Some JSON implementations use the last key if multiple are given, others throw an error.
Strings must always be enclosed in double quotes.
All unicode is valid. Characters can be escaped with a backslash. "\"" = ".

Data Types

Data Type	Notated By	Example
Strings	“STRING”	`"string": "value"`
Integer	INT	`"integer": 1`
Floating-point numbers	`x.yy` or `xEy` or `x.yE{+\|-}z`	`"key": 1.00`
Arrays	[]	`[1,2,3,"GO"]`
Objects	{}	`"object": {"i": 1, "y": 2}`
Boolean	`true` or `false`	`"boolean": false`
Null	`null`	`"null": null`

E = E (exponent) notation.
Arrays contain comma-separated lists of values. Multiple types can be used in a single array.
Objects contain comma-separated collections of key-value pairs.
Objects can exist within arrays, and arrays can exist within objects.
When objects exist within arrays, no key is used; just the curly brackets.
There are no official comments, however, some parsers accept C-like comments (// or /* */).

Simple example

{
  "name": "bob",
  "age": 24,
  "height": 180.2,
  "shoppingList": [1, "Apple", 2, "Oranges"],
  "religulous": false,
  "money": null,
  "backpack": {"bread": 2, "porridge": null}
}

Prettify

Easy prettification:

file.json | python3 -m json.tool