human
Complete the below
def get_form(model, converter, base_class=form.BaseForm, only=None, exclude=None, field_args=None, extra_fields=None):

    ''''Create a wtforms Form for a given mongoengine Document schema::
    from flask_mongoengine.wtf import model_form
    from myproject.myapp.schemas import Article
    ArticleForm = model_form(Article)
    :param model:
    A mongoengine Document schema class
    :param base_class:
    Base form class to extend from. Must be a ``wtforms.Form`` subclass.
    :param only:
    An optional iterable with the property names that should be included in
    the form. Only these properties will have fields.
    :param exclude:
    An optional iterable with the property names that should be excluded
    from the form. All other properties will have fields.
    :param field_args:
    An optional dictionary of field names mapping to keyword arguments used
    to construct each field object.
    :param converter:
    A converter to generate the fields based on the model properties. If
    not set, ``ModelConverter`` is used.'
    '''
 ... Can you provide a the Python code you requested?
assistant
#Here is the Python code you requested.
    if isinstance(model, str):
        model = get_document(model)
    if (not isinstance(model, (BaseDocument, DocumentMetaclass))):
        raise TypeError('Model    must    be    a    mongoengine    Document    schema')
    field_args = (field_args or {})
    properties = sorted(((k, v) for (k, v) in iteritems(model._fields)), key=(lambda v: v[1].creation_counter))
    if only:
        props = dict(properties)
        def find(name):
            if (extra_fields and (name in extra_fields)):
                return FieldPlaceholder(extra_fields[name])
            p = props.get(name)
            if (p is not None):
                return p
            raise ValueError(('Invalid    model    property    name    %s.%s' % (model, name)))
        properties = ((p, find(p)) for p in only)
    elif exclude:
        properties = (p for p in properties if (p[0] not in exclude))
    field_dict = {}
    for (name, p) in properties:
        field = converter.convert(model, p, field_args.get(name))
        if (field is not None):
            field_dict[name] = field
    if ((not only) and extra_fields):
        for (name, field) in iteritems(extra_fields):
            field_dict[name] = form.recreate_field(field)
    field_dict['model_class'] = model
    return type((model.__name__ + 'Form'), (base_class,), field_dict)