Traceback (most recent call last):


 "C:\Users\S10500\AppData\Local\Continuum\anaconda3\lib\site-packages\spyder\widgets\ipythonconsole\client.py", line 575, in show_time

elapsed_time = time.monotonic() - self.t0
TypeError: unsupported operand type(s) for -: 'float' and 'NoneType'

Traceback (most recent call last):


 "/usr/local/lib/python2.7/dist-packages/tornado/web.py", line 1413, in _execute

result = method(*self.path_args, **self.path_kwargs)


 "/usr/local/lib/python2.7/dist-packages/tornado/web.py", line 2721, in wrapper

return method(self, *args, **kwargs)


 "/usr/local/lib/python2.7/dist-packages/flower/views/tasks.py", line 88, in get

search=search


 "/usr/local/lib/python2.7/dist-packages/flower/views/__init__.py", line 20, in render

super(BaseHandler, self).render(*args, **kwargs)


 "/usr/local/lib/python2.7/dist-packages/tornado/web.py", line 704, in render

html = self.render_string(template_name, **kwargs)


 "/usr/local/lib/python2.7/dist-packages/tornado/web.py", line 811, in render_string

return t.generate(**namespace)


 "/usr/local/lib/python2.7/dist-packages/tornado/template.py", line 278, in generate

return execute()


 "tasks_html.generated.py", line 225, in _tt_execute

for uuid, task in tasks:
# tasks.html:151 (via base.html:49)


 "/usr/local/lib/python2.7/dist-packages/flower/utils/tasks.py", line 46, in iter_tasks

if not satisfies_search_terms(task, any_value_search_term, result_search_term, args_search_terms, kwargs_search_terms):


 "/usr/local/lib/python2.7/dist-packages/flower/utils/search.py", line 32, in satisfies_search_terms

any_value_search_term and any_value_search_term in '|'.join([task.args, task.kwargs, str(task.result)]),
TypeError: sequence item 0: expected string, NoneType found
