[Python/Module] JSON

JSON

• syntax for storing and exchanging data
• text, JavaScript object notation

import json

# some JSON:
x =  '{ "name":"John", "age":30, "city":"New York"}'

# parse x:
y = json.loads(x)

# the result is a Python dictionary:
print(y["age"])

Parse JSON - Convert from JSON to Python: json.loads()

• result: dictionary

Convert from Python to JSON: json.dumps()

import json

# a Python object (dict):
x = {
  "name": "John",
  "age": 30,
  "city": "New York"
}

# convert into JSON:
y = json.dumps(x)

convert Python objects into JSON strings:

• dict
• list
• tuple
• string
• int
• float
• True
• False
• None

import json

print(json.dumps({"name": "John", "age": 30}))
print(json.dumps(["apple", "bananas"]))
print(json.dumps(("apple", "bananas")))
print(json.dumps("hello"))
print(json.dumps(42))
print(json.dumps(31.76))
print(json.dumps(True))
print(json.dumps(False))
print(json.dumps(None))

Python objects vs. JSON (JavaScript)

Python	JSON
dict	Object
list	Array
tuple	Array
str	String
int	Number
float	Number
TRUE	TRUE
FALSE	FALSE
None	null

Format the Result

• indent
• seperator
• sort key

json.dumps(x, indent=4, separators=(". ", " = "), sort_keys=True)