emitjson 0.0.1

Help composing objects to emit JSON.

emitjson.repository() creates a standard single-dispatch generic function to covert objects to JSON-friendly objects. repository() converts some object types that are not supported by json module such as set() or datetime.datetime().

You can also add your own converters as singledispatch function.

import emitjson
import base64

my_repo = emitjson.repository()  # create emitjson repository

@myrepo.register(bytes)
def conv_bytes(obj):
    # encode bytes object in Base64 format
    return base64.b64encode(obj).decode('ascii')

You can also define mapper class to convert objects to dictionary.

from emitjson repository, attr, ObjConverter

class Class1:
    def __init__(self):
        self.prop1 = 'spam'
        self.prop2 = 'ham'

class Class2:
    def __init__(self):
        self.prop3 = [Class1()]


my_repo = emitjson.repository()  # create emitjson repository

@my_repo.register(Class1)
class Class1Converter(ObjConverter):
    prop1 = attr    # get obj.prop1
    prop2 = attr    # get obj.prop2

@my_repo.register(Class2)
class Class2Converter(ObjConverter):
    prop_x = attr('prop3')  # get obj.prop3 but store as 'prop_x'