kivymd dropdownmenu

[Degenerate Tech]

drop is object property in UnitConverter()

this shows error   

 

#:import  MDDropdownMenu kivymd.uix.menu 

<UnitConverter>:

orientation: 'vertical'

drop:MDDropdownMenu(caller=root.ids.s,items=[{"text":"0"}])

MDToolbar:

title:"Unit Converter"

MDTabs:

elevation:10

Tabs:

text:"battery-10"

orientation: 'vertical'

ScrollView:

size_hint: (1, 1)

        do_scroll_x: 0

        do_scroll_y: True

        scroll_type:['bars', 'content']

        bar_width: 100

       

        GridLayout:

        cols:1

       

       

            id: sv_grid

            size_hint: 1, None

            height:self.minimum_height

            row_force_default:True

row_default_height:100

BoxLayout:

MDDropDownItem:

text: "mm"

font_size: 20

current_item:"mm"

id:s

##############errror 

[INFO   ] [CutBuffer   ] cut buffer support enabled
Traceback (most recent call last):
  File "/usr/lib/python3/dist-packages/kivy/lang/builder.py", line 249, in create_handler
    return eval(value, idmap), bound_list
  File "/home/sahil/kivy_md/CalculatorMD/unitconverter.kv", line 4, in <module>
    drop:MDDropdownMenu(caller=root.ids.s,items=[{"text":"0"}])
TypeError: 'module' object is not callable
 
During handling of the above exception, another exception occurred:
 
Traceback (most recent call last):
  File "/usr/lib/python3/dist-packages/kivy/lang/builder.py", line 692, in _apply_rule
    rctx['ids'])
  File "/usr/lib/python3/dist-packages/kivy/lang/builder.py", line 254, in create_handler
    cause=tb)
kivy.lang.builder.BuilderException: Parser: File "/home/sahil/kivy_md/CalculatorMD/unitconverter.kv", line 4:
...
      2:<UnitConverter>:
      3:       orientation: 'vertical'
>>    4:       drop:MDDropdownMenu(caller=root.ids.s,items=[{"text":"0"}])
      5:
      6:       MDToolbar:
...
TypeError: 'module' object is not callable
  File "/usr/lib/python3/dist-packages/kivy/lang/builder.py", line 249, in create_handler
    return eval(value, idmap), bound_list
  File "/home/sahil/kivy_md/CalculatorMD/unitconverter.kv", line 4, in <module>
    drop:MDDropdownMenu(caller=root.ids.s,items=[{"text":"0"}])
 
 
During handling of the above exception, another exception occurred:
 
Traceback (most recent call last):
  File "main.py", line 61, in <module>
    Calculator().run()
  File "/usr/lib/python3/dist-packages/kivy/app.py", line 829, in run
    root = self.build()
  File "main.py", line 54, in build
    self.uc=UnitConverter()
  File "/usr/lib/python3/dist-packages/kivy/uix/boxlayout.py", line 145, in __init__
    super(BoxLayout, self).__init__(**kwargs)
  File "/usr/lib/python3/dist-packages/kivy/uix/layout.py", line 76, in __init__
    super(Layout, self).__init__(**kwargs)
  File "/usr/lib/python3/dist-packages/kivy/uix/widget.py", line 361, in __init__
    rule_children=rule_children)
  File "/usr/lib/python3/dist-packages/kivy/uix/widget.py", line 469, in apply_class_lang_rules
    rule_children=rule_children)
  File "/usr/lib/python3/dist-packages/kivy/lang/builder.py", line 538, in apply
    rule_children=rule_children)
  File "/usr/lib/python3/dist-packages/kivy/lang/builder.py", line 707, in _apply_rule
    e), cause=tb)
kivy.lang.builder.BuilderException: Parser: File "/home/sahil/kivy_md/CalculatorMD/unitconverter.kv", line 4:
...
      2:<UnitConverter>:
      3:       orientation: 'vertical'
>>    4:       drop:MDDropdownMenu(caller=root.ids.s,items=[{"text":"0"}])
      5:
      6:       MDToolbar:
...
BuilderException: Parser: File "/home/sahil/kivy_md/CalculatorMD/unitconverter.kv", line 4:
...
      2:<UnitConverter>:
      3:       orientation: 'vertical'
>>    4:       drop:MDDropdownMenu(caller=root.ids.s,items=[{"text":"0"}])
      5:
      6:       MDToolbar:
...
TypeError: 'module' object is not callable
  File "/usr/lib/python3/dist-packages/kivy/lang/builder.py", line 249, in create_handler
    return eval(value, idmap), bound_list
  File "/home/sahil/kivy_md/CalculatorMD/unitconverter.kv", line 4, in <module>
    drop:MDDropdownMenu(caller=root.ids.s,items=[{"text":"0"}])
 
  File "/usr/lib/python3/dist-packages/kivy/lang/builder.py", line 692, in _apply_rule
    rctx['ids'])
  File "/usr/lib/python3/dist-packages/kivy/lang/builder.py", line 254, in create_handler
    cause=tb)

[Degenerate Tech]

here i am creating a object ...where i am going worng ?

[Andreas Ecker]

the import statement of the kv lang is different to the one in python...

in short simply change:

#:import  MDDropdownMenu kivymd.uix.menu

into:

#:import  MDDropdownMenu MDDropdownMenu kivymd.uix.menu

background info you find in the kivy docs here: https://kivy.org/doc/stable/guide/lang.html#special-syntax

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[Andreas Ecker]

SORRY ignore the last email (there was a typo in the solution)

AGAIN ... the syntax for to import classes in the kv lang is different to the one in python...

in short simply change:

#:import  MDDropdownMenu kivymd.uix.menu

into:

#:import  MDDropdownMenu MDDropdownMenu.kivymd.uix.menu

background info you find in the kivy docs here: https://kivy.org/doc/stable/guide/lang.html#special-syntax