>>> json.dump(rec, fp=open('testjson.txt', 'w'), indent=4)
>>> print(open('testjson.txt').read())
{
"job": [
"dev",
"mgr" ],
"name": {
"last": "Smith",
"first": "Bob" },
"age": 40.5 }
>>> P = json.load(open('testjson.txt'))
>>> P
{'job': ['dev', 'mgr'], 'name': {'last': 'Smith', 'first': 'Bob'}, 'age': 40.5}
It’s similarly straightforward to translate Python objects to and from JSON data strings in files. Prior to being stored in a file, your data is simply Python objects; the JSON module recreates them from the JSON textual representation when it loads it from the file
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