# -*- coding: utf-8 -*-
# Copyright (c) 2017, System Engineering Software Society
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# modification, are permitted provided that the following conditions are met:
# * Redistributions of source code must retain the above copyright
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from __future__ import (print_function, division, unicode_literals,
absolute_import)
import json
from sympathy.api import node as synode
from sympathy.api.nodeconfig import Port, Ports, Tag, Tags
[docs]class CreateJSON(synode.Node):
"""
Manually Create JSON by writing a python expression which evaluates
to a dictionary containing normal python values, that is, dictionaries
lists, floats, integers, strings and booleans.
Optional input port, named arg, can be used in the expression. Have a look
at the :ref:`Data type APIs<datatypeapis>` to see what methods and
attributes are available on the data type that you are working with.
"""
name = 'Manually Create JSON'
author = 'Erik der Hagopian <erik.hagopian@sysess.org>'
copyright = '(C) 2017 System Engineering Software Society'
version = '0.1'
icon = 'create_json.svg'
tags = Tags(Tag.Input.Generate)
nodeid = 'org.sysess.sympathy.create.createjson'
inputs = Ports([Port.Custom('<a>', 'Input',
name='arg', n=(0, 1))])
outputs = Ports([Port.Json('Output', name='output')])
parameters = synode.parameters()
parameters.set_string(
'code',
description='Python expression that evaluates to a dictionary.',
value='{} # Empty dictionary.',
editor=synode.Util.code_editor().value())
def execute(self, node_context):
inputs = node_context.input.group('arg')
arg = inputs[0] if inputs else None
env = {'arg': arg}
dict_ = eval(compile(node_context.parameters['code'].value,
'<string>', 'eval'),
env, env)
node_context.output[0].set(dict_)
[docs]class JSONtoText(synode.Node):
"""
JSON to Text.
"""
name = 'JSON to Text'
author = 'Erik der Hagopian <erik.hagopian@sysess.org>'
copyright = '(C) 2017 System Engineering Software Society'
version = '1.0'
icon = 'create_json.svg'
tags = Tags(Tag.DataProcessing.Convert)
nodeid = 'org.sysess.sympathy.convert.jsontotext'
inputs = Ports([Port.Json('Input', name='input')])
outputs = Ports([Port.Text('Output', name='output')])
parameters = synode.parameters()
def execute(self, node_context):
node_context.output[0].set(
json.dumps(node_context.input[0].get()))
[docs]class TexttoJSON(synode.Node):
"""
Text to JSON.
"""
name = 'Text to JSON'
author = 'Erik der Hagopian <erik.hagopian@sysess.org>'
copyright = '(C) 2017 System Engineering Software Society'
version = '1.0'
icon = 'create_json.svg'
tags = Tags(Tag.DataProcessing.Convert)
nodeid = 'org.sysess.sympathy.convert.texttojson'
inputs = Ports([Port.Text('Input', name='input')])
outputs = Ports([Port.Json('Output', name='output')])
parameters = synode.parameters()
def execute(self, node_context):
node_context.output[0].set(
json.loads(node_context.input[0].get()))
