json 0.1.0 on Edge Python

json

json is loads and dumps. loads takes the object_hook, object_pairs_hook, parse_float, parse_int and parse_constant callables. dumps takes indent, sort_keys, ensure_ascii, check_circular, allow_nan, skipkeys, default, separators and cls.

from json import dumps, loads

data = loads('{"name":"ada","tags":["math","cs"]}')
print(data["name"])
print(dumps({"k": [1, 2, 3], "ok": True}))

{
  "imports": {
    "json": "https://cdn.edgepython.com/pkg/json/0.1.0/app.edge#sha256-055de97b4078ea30b1df7093e373c69d56e9e00ca6c79af1599156d3b87721b3"
  }
}

ada
{"k": [1, 2, 3], "ok": true}

Output

indent and sort_keys shape the output.

from json import dumps

print(dumps({"b": 1, "a": [True, None]}, indent=2, sort_keys=True))

{
  "imports": {
    "json": "https://cdn.edgepython.com/pkg/json/0.1.0/app.edge#sha256-055de97b4078ea30b1df7093e373c69d56e9e00ca6c79af1599156d3b87721b3"
  }
}

{
  "a": [
    true,
    null
  ],
  "b": 1
}

Output

Integers cross as 128-bit values, so a round trip keeps numbers past 64 bits, and a float that holds a whole number keeps its .0 so it comes back a float.

from json import dumps, loads

big = 2 ** 100
print(loads(dumps(big)) == big)
print(dumps(3.0))
print(loads(dumps(3.0)))

{
  "imports": {
    "json": "https://cdn.edgepython.com/pkg/json/0.1.0/app.edge#sha256-055de97b4078ea30b1df7093e373c69d56e9e00ca6c79af1599156d3b87721b3"
  }
}

True
3.0
3.0

Output

A parse failure raises json.JSONDecodeError, which is ValueError here, nesting past 1000 levels raises RuntimeError, and a value with no JSON form raises TypeError unless default turns it into one.

from json import dumps, loads

try:
    loads("{nope")
except ValueError as e:
    print("parse failed:", e)

def helper():
    pass

try:
    dumps({"fn": helper})
except TypeError as e:
    print("dump failed:", e)

{
  "imports": {
    "json": "https://cdn.edgepython.com/pkg/json/0.1.0/app.edge#sha256-055de97b4078ea30b1df7093e373c69d56e9e00ca6c79af1599156d3b87721b3"
  }
}

parse failed: Expecting property name enclosed in double quotes: line 1 column 2 (char 1)
dump failed: Object of type function is not JSON serializable

Output

json

json

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