problem to execute

[johndizaro]

Environment Info

Pip is not installed

Traceback

Traceback (most recent call last):
  File "/home/john/.virtualenvs/Documentos/venvs/kivy-designer/lib/python3.6/site-packages/kivy/core/window/window_sdl2.py", line 727, in mainloop
    self._mainloop()
  File "/home/john/.virtualenvs/Documentos/venvs/kivy-designer/lib/python3.6/site-packages/kivy/core/window/window_sdl2.py", line 460, in _mainloop
    EventLoop.idle()
  File "/home/john/.virtualenvs/Documentos/venvs/kivy-designer/lib/python3.6/site-packages/kivy/base.py", line 340, in idle
    self.dispatch_input()
  File "/home/john/.virtualenvs/Documentos/venvs/kivy-designer/lib/python3.6/site-packages/kivy/base.py", line 325, in dispatch_input
    post_dispatch_input(*pop(0))
  File "/home/john/.virtualenvs/Documentos/venvs/kivy-designer/lib/python3.6/site-packages/kivy/base.py", line 231, in post_dispatch_input
    listener.dispatch('on_motion', etype, me)
  File "kivy/_event.pyx", line 707, in kivy._event.EventDispatcher.dispatch (/tmp/pip-req-build-lgn7qisv/kivy/_event.c:7727)
  File "/home/john/.virtualenvs/Documentos/venvs/kivy-designer/lib/python3.6/site-packages/kivy/core/window/__init__.py", line 1364, in on_motion
    self.dispatch('on_touch_up', me)
  File "kivy/_event.pyx", line 707, in kivy._event.EventDispatcher.dispatch (/tmp/pip-req-build-lgn7qisv/kivy/_event.c:7727)
  File "/home/john/.virtualenvs/Documentos/venvs/kivy-designer/lib/python3.6/site-packages/kivy/core/window/__init__.py", line 1400, in on_touch_up
    if w.dispatch('on_touch_up', touch):
  File "kivy/_event.pyx", line 707, in kivy._event.EventDispatcher.dispatch (/tmp/pip-req-build-lgn7qisv/kivy/_event.c:7727)
  File "/home/john/.virtualenvs/Documentos/venvs/kivy-designer/lib/python3.6/site-packages/kivy/uix/dropdown.py", line 310, in on_touch_up
    if super(DropDown, self).on_touch_up(touch):
  File "/home/john/.virtualenvs/Documentos/venvs/kivy-designer/lib/python3.6/site-packages/kivy/uix/scrollview.py", line 848, in on_touch_up
    if self.dispatch('on_scroll_stop', touch):
  File "kivy/_event.pyx", line 707, in kivy._event.EventDispatcher.dispatch (/tmp/pip-req-build-lgn7qisv/kivy/_event.c:7727)
  File "/home/john/.virtualenvs/Documentos/venvs/kivy-designer/lib/python3.6/site-packages/kivy/uix/scrollview.py", line 887, in on_scroll_stop
    self.simulate_touch_down(touch)
  File "/home/john/.virtualenvs/Documentos/venvs/kivy-designer/lib/python3.6/site-packages/kivy/uix/scrollview.py", line 607, in simulate_touch_down
    ret = super(ScrollView, self).on_touch_down(touch)
  File "/home/john/.virtualenvs/Documentos/venvs/kivy-designer/lib/python3.6/site-packages/kivy/uix/widget.py", line 460, in on_touch_down
    if child.dispatch('on_touch_down', touch):
  File "kivy/_event.pyx", line 707, in kivy._event.EventDispatcher.dispatch (/tmp/pip-req-build-lgn7qisv/kivy/_event.c:7727)
  File "/home/john/.virtualenvs/Documentos/venvs/kivy-designer/lib/python3.6/site-packages/kivy/uix/widget.py", line 460, in on_touch_down
    if child.dispatch('on_touch_down', touch):
  File "kivy/_event.pyx", line 707, in kivy._event.EventDispatcher.dispatch (/tmp/pip-req-build-lgn7qisv/kivy/_event.c:7727)
  File "/home/john/.virtualenvs/Documentos/venvs/kivy-designer/lib/python3.6/site-packages/kivy/uix/behaviors/button.py", line 151, in on_touch_down
    self.dispatch('on_press')
  File "kivy/_event.pyx", line 707, in kivy._event.EventDispatcher.dispatch (/tmp/pip-req-build-lgn7qisv/kivy/_event.c:7727)
  File "/home/john/Documentos/sistemas_em_desenvolvimento/kivy/kivy-designer-master/designer/uix/action_items.py", line 183, in on_press
    self.cont_menu.dismiss()
AttributeError: 'NoneType' object has no attribute 'dismiss'

End of Traceback