capybara/virtualenv/lib/python2.7/site-packages/flask/json.py
def dump(obj, fp, **kwargs):
    """Like :func:`dumps` but writes into a file object."""
    _dump_arg_defaults(kwargs)
    encoding = kwargs.pop('encoding', None)
    if encoding is not None:
        fp = _wrap_writer_for_text(fp, encoding)
    _json.dump(obj, fp, **kwargs)
def dump(obj, fp, **kwargs):
    """Like :func:`dumps` but writes into a file object."""
    _dump_arg_defaults(kwargs)
    encoding = kwargs.pop('encoding', None)
    if encoding is not None:
        fp = _wrap_writer_for_text(fp, encoding)
    _json.dump(obj, fp, **kwargs)
Like :func:`dumps` but writes into a file object.