File "venv/bin/pydocstyle", line 8, in <module>
    sys.exit(main())
  File "venv/lib/python3.7/site-packages/pydocstyle/cli.py", line 79, in main
    sys.exit(run_pydocstyle())
  File "venv/lib/python3.7/site-packages/pydocstyle/cli.py", line 54, in run_pydocstyle
    ignore_self_only_init=ignore_self_only_init,
  File "venv/lib/python3.7/site-packages/pydocstyle/checker.py", line 1171, in check
    ignore_self_only_init,
  File "venv/lib/python3.7/site-packages/pydocstyle/checker.py", line 159, in check_source
    self, definition, definition.docstring
  File "venv/lib/python3.7/site-packages/pydocstyle/checker.py", line 244, in check_docstring_empty
    if docstring and is_blank(ast.literal_eval(docstring)):
  File "/root/.pyenv/versions/3.7.2/lib/python3.7/ast.py", line 91, in literal_eval
    return _convert(node_or_string)
  File "/root/.pyenv/versions/3.7.2/lib/python3.7/ast.py", line 90, in _convert
    return _convert_signed_num(node)
  File "/root/.pyenv/versions/3.7.2/lib/python3.7/ast.py", line 63, in _convert_signed_num
    return _convert_num(node)
  File "/root/.pyenv/versions/3.7.2/lib/python3.7/ast.py", line 55, in _convert_num
    raise ValueError('malformed node or string: ' + repr(node))
ValueError: malformed node or string: <_ast.JoinedStr object at 0x7f296ff35a20>