Update expansionpanel.py

[Sahil-pixel]

def _set_content_height(self, *args):
self._original_content_height = self._content.height - dp(88)
self._content.height = 0
IN THIS LINE self._original_content_height = self._content.height - dp(88)
dp(88) subtraction is not required .
If we add widgets in MDExpansionPanelContent widget then there is some error for calculation and MDExpansionPanelContent's children not set in boxlayout properly ,

[Sahil-pixel]

Also see panel._original_content_height is updated after some frame . so please check it . properly . MDExpansionPanel need to be fixed . see i use Clock to get updated value panel._original_content_height. in Desktop it not needed but in mobile device it is needed . please see those things properly .

def tap_expansion_chevron(self,panel,content,header,chevron):
		Animation(
     		padding=[0, dp(12), 0, dp(12)]
            if not panel.is_open
            else [0, 0, 0, 0],
            d=0.2,
       	 	).start(panel)
		
		
		print(panel._content)#=content
		print(panel._header) #=header
		print(panel._original_content_height)
		#panel._header = ObjectProperty()  # MDExpansionPanelHeader object
    	#_content = 
		#panel.open() if not panel.is_open else panel.close()
		Clock.schedule_once(partial(self._call,panel))


        
def _call(self,panel,dt):
		
          print(panel._content)#=content
          print(panel._header) #=header
          print(panel._original_content_height)
          panel.open() if not panel.is_open else panel.close()