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json_utils.py

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from typing import Text, Any, Dict, List, Union, Optional

import os

import json

import simplejson

from io_utils import read_file, write_to_file

## dumped = json_to_string({"ok": 'JSON posted'})

def json_to_string(obj, **kwargs):

indent = kwargs.pop("indent", 2)

ensure_ascii = kwargs.pop("ensure_ascii", False)

return json.dumps(obj, indent=indent, ensure_ascii=ensure_ascii, **kwargs)

def read_json_file(filename):

"""Read json from a file."""

content = read_file(filename)

try:

return simplejson.loads(content)

except ValueError as e:

raise ValueError("Failed to read json from '{}'. Error: "

"{}".format(os.path.abspath(filename), e))

def write_json_to_file(filename:Text, obj:Any, **kwargs):

"""Write an object as a json string to a file."""

write_to_file(filename, json_to_string(obj, **kwargs))

def json_object(obj):

return json.dumps(obj, default=lambda o: o.__dict__,

sort_keys=True, indent=4)

# write_json=lambda f,o: write_json_to_file(f,o)

class SetEncoder(json.JSONEncoder):

def default(self, obj):

if isinstance(obj, set):

return list(obj)

return json.JSONEncoder.default(self, obj)

def write_json(filename, o):

import io

with io.open(filename, 'w', encoding="utf-8") as f:

f.write(json.dumps(o, indent=2, ensure_ascii=False,

cls=SetEncoder))

pretty_json=lambda o: json.dumps(o, indent=2, ensure_ascii=False)