response time for button click too slow

[Madhura Bhogate]

Hi kivy users,

I am a MAC user and I created a virtual env for python 3.6.3 version.

Whenever I create buttons and add on_release feature to it fails to detect the right button being clicked.

Is the response time for button too slow ? 

 My pip freeze looks as below-

certifi==2017.11.5

chardet==3.0.4

Cython==0.26.1

docutils==0.14

idna==2.6

Kivy==1.10.0

Kivy-Garden==0.1.4

pygame==1.9.3

Pygments==2.2.0

requests==2.18.4

urllib3==1.22

I created a simple app. Below is the code:

I have two buttons - Heads and Tails and depending on which button is clicked the label text is set.

Scenario: If I have clicked on heads, the label shows 'heads'. Next if I click the 'tails' button, it still clicks heads.

I have to click on the 'tails' button several times till it detects it. Why is this so ?

Is this expected ? Or am I missing something in my setup/config/code?

=========================cointoss.py =================================

from kivy.app import App
from kivy.uix.boxlayout import BoxLayout


class CoinTossBoxLayout(BoxLayout):
    def choice(self, guess):
        self.ids.result.text = 'You clicked the %s button!' % guess


class CoinTossApp(App):

    def build(self):
        return CoinTossBoxLayout()


if __name__ == '__main__':
    CoinTossApp().run()

====================cointoss.kv ======================

<CoinTossBoxLayout>:
  orientation: 'vertical'
  Label:
    text: 'Welcome to the Heads or Tails!'
    font_size: 50
  BoxLayout:
    orientation: 'horizontal'
    Button:
      text: 'Heads'
      on_release: root.choice('heads')
    Button:
      text: 'Tails'
      on_release: root.choice('tails')
  Label:
    id: result
    text: ''
    font_size: 40

===================================================

[ZenCODE]

And how does it behave if you use 'on_press' instead? That might reveal something...