new methods to emit JSON

[wisotzky]

Would be good to have a new method to natively create Python JSON values (dict):

Example:

>>> data = jxmlease.parse('<a>123</a>')
>>> json = data.emit_json()
>>> print json
{u'a': u'123'}
>>> print json['a']
123

While the current implementation of prettyprint is almost doing the same, the intend would not really be printing but using it with other Python libraries like deepdiff.

Example:

>>> import deepdiff
>>> d1 = jxmlease.parse('<a>123</a>')
>>> d2 = jxmlease.parse('<a>456</a>')
>>> deepdiff.DeepDiff(d1, d2)
{'values_changed': {"root['a']": {'new_value': XMLCDATANode(xml_attrs=OrderedDict(), value=u'456'), 'old_value': XMLCDATANode(xml_attrs=OrderedDict(), value=u'123')}}}
>>>
>>> deepdiff.DeepDiff(d1.emit_json(), d2.emit_json())
{'values_changed': {"root['a']": {'new_value': u'456', 'old_value': u'123'}}}

In consequence the output of deepdiff would be very much more streamlined.

[wisotzky]

After short code reading, solution (workaround) might be to set the attribute currdepth to a non-zero value. Unclear, if this workaround is official - as this attribute is not really defined in the official API description.

Example:

>>> x = jxmlease.parse("<a/>")
>>> x.prettyprint(currdepth=1)
{u'a': u''}
>>> x.prettyprint(currdepth=1)['a']
u''

While this was not supported:

>>> y=x.prettyprint()['a']
{u'a': u''}
Traceback (most recent call last):
  File "<stdin>", line 1, in <module>
TypeError: 'NoneType' object has no attribute '__getitem__'