Traceback (most recent call last):

 "youtube_dl\YoutubeDL.pyo", line 656, in extract_info

 "youtube_dl\extractor\common.pyo", line 275, in extract

 "youtube_dl\extractor\yahoo.pyo", line 191, in _real_extract

 "youtube_dl\extractor\yahoo.pyo", line 214, in _get_infoExtractorError: Yahoo returned error: missing video tag
Traceback (most recent call last):


 "/home/pb/play/jupyter/jupyter-venv/local/lib/python2.7/site-packages/qgrid/grid.py", line 1419, in _handle_qgrid_msg

self._handle_qgrid_msg_helper(content)


 "/home/pb/play/jupyter/jupyter-venv/local/lib/python2.7/site-packages/qgrid/grid.py", line 1483, in _handle_qgrid_msg_helper

row_index = self._duplicate_last_row()


 "/home/pb/play/jupyter/jupyter-venv/local/lib/python2.7/site-packages/qgrid/grid.py", line 1641, in _duplicate_last_row

last_index = max(df.index)
ValueError: max() arg is an empty sequence
