In [19]: exc
Out[19]:
hglib.error.CommandError('hg',
'clone',
b'--',
'https://github.com/jsbsan/mozilla-festival')
In [20]: str(exc)
Out[20]: '(255, b\'\', b\'abort: \\\'https://github.com/jsbsan/mozilla-festival\\\' does not appear to be an hg repository:\\n---%<--- (text/html; charset=utf-8)\\n\\n\\n\\n\\n\\n\\n\\n\\n \\n \\n \\n \\n \\n \\n\\n\\n\\n \\n \\n \n \n \n \n \n \n \n\n\n\n \n \n