python - Name is not defined when using variables and functions in Kivy -
i'm creating program interacts server, program employees use on mobile device, i'm using kivy, , i'm doing gui first. followed instructions on documentation best of understanding, cannot seem solve problem. code refers variables , functions, but, whenever runs crashes , gives me , error code stating name of variable or function (whichever called first) not defined
here's code:
import sqlalchemy import os import kivy import datetime kivy.uix.screenmanager import screenmanager, screen kivy import app kivy.uix import button kivy.uix.textinput import textinput kivy.uix.label import label kivy.lang import builder admincode = "..." # sql functions # incomplete of # shift pulled database shift = false def userlogin(id = 'unfilled', password = 'unfilled'): global user global localhost_enabled if id == "localtest" , password == admincode: user = id localhost_enabled = true return true elif id == "servertest" , password == admincode: user = id localhost_enabled = false return true def userlogout(): user = '' def shiftin(): global shift shift = true def shiftout(): global shift shift = false def submitform(startcash=0, endcash=0): netcash = endcash - startcash print("netcash = {0}".format(netcash)) def shiftgetter(): if shift == true: return "shift out" else: return "shift in" # kivy building builder.load_string(""" <loginscreen>: boxlayout: label: text: 'id:' textinput: id: logininputuser text: '' multiline: false label: text: "password:" textinput: id: logininputpassword text: '' password: true multiline: false button: text: 'login' on_press: if userlogin(logininputuser.text, logininputpassword.text): loginvalidationtext.text = '' if userlogin(logininputuser.text, logininputpassword.text): root.manager.current = 'home' else: loginvalidationtext.text = 'invalid username or password' label: text: '' id: 'loginvalidationtext' <homescreen>: boxlayout: button: text: 'logout' on_press: userlogout() root.manager.current = 'login' button: text: 'open submission form' on_press: root.manager.current = 'form' button: text: 'shift out' if shift == true else 'shift in' on_press: if shift: shiftout() else: shiftin() <formscreen>: boxlayout: button: text: 'back menu' on_press: root.manager.current = 'home' label: text: 'start money:' textinput: id: startcash text: '' multiline: false label: text: 'end money:' textinput: id: endcash text: '' multiline: false button: text: 'submit' on_press: submitform(startcash = int(startcash.text), endcash = int(endcash.text)) """) class loginscreen(screen): pass class homescreen(screen): pass class formscreen(screen): pass sm = screenmanager() sm.add_widget(loginscreen(name='login')) sm.add_widget(homescreen(name='home')) sm.add_widget(formscreen(name='form')) class realapp(app): def build(self): return sm realapp().run() and error message:
[info ] [logger ] record log in c:\users\sherl\.kivy\logs\kivy_17-08-20_28.txt [info ] [kivy ] v1.10.0 [info ] [python ] v3.6.2 (v3.6.2:5fd33b5, jul 8 2017, 04:14:34) [msc v.1900 32 bit (intel)] [info ] [factory ] 194 symbols loaded [info ] [image ] providers: img_tex, img_dds, img_sdl2, img_gif (img_pil, img_ffpyplayer ignored) [info ] [text ] provider: sdl2 [info ] [osc ] using <thread> socket [info ] [window ] provider: sdl2 [info ] [gl ] using "opengl" graphics system [info ] [gl ] glew initialization succeeded [info ] [gl ] backend used <glew> [info ] [gl ] opengl version <b'4.4.0 - build 20.19.15.4531'> [info ] [gl ] opengl vendor <b'intel'> [info ] [gl ] opengl renderer <b'intel(r) hd graphics 5500'> [info ] [gl ] opengl parsed version: 4, 4 [info ] [gl ] shading version <b'4.40 - build 20.19.15.4531'> [info ] [gl ] texture max size <16384> [info ] [gl ] texture max units <32> [info ] [shader ] fragment shader: <b"warning: 0:7: '' : #version directive missing"> [info ] [shader ] vertex shader: <b"warning: 0:7: '' : #version directive missing"> [info ] [window ] auto add sdl2 input provider [info ] [window ] virtual keyboard not allowed, single mode, not docked traceback (most recent call last): file "c:\users\sherl\appdata\local\programs\python\python36-32\lib\site-packages\kivy\lang\builder.py", line 249, in create_handler return eval(value, idmap), bound_list file "<string>", line 39, in <module> nameerror: name 'shift' not defined during handling of above exception, exception occurred: traceback (most recent call last): file "c:\users\sherl\appdata\local\programs\python\python36-32\lib\site-packages\kivy\lang\builder.py", line 597, in _apply_rule rctx['ids']) file "c:\users\sherl\appdata\local\programs\python\python36-32\lib\site-packages\kivy\lang\builder.py", line 254, in create_handler cause=tb) kivy.lang.builder.builderexception: parser: file "<inline>", line 39: ... 37: on_press: root.manager.current = 'form' 38: button: >> 39: text: 'shift out' if shift == true else 'shift in' 40: on_press: 41: if shift: shiftout() ... nameerror: name 'shift' not defined file "c:\users\sherl\appdata\local\programs\python\python36-32\lib\site-packages\kivy\lang\builder.py", line 249, in create_handler return eval(value, idmap), bound_list file "<string>", line 39, in <module> during handling of above exception, exception occurred: traceback (most recent call last): file "c:\users\sherl\pycharmprojects\pokerroomsql\user\userdepreciated.py", line 126, in <module> sm.add_widget(homescreen(name='home')) file "c:\users\sherl\appdata\local\programs\python\python36-32\lib\site-packages\kivy\uix\relativelayout.py", line 265, in __init__ super(relativelayout, self).__init__(**kw) file "c:\users\sherl\appdata\local\programs\python\python36-32\lib\site-packages\kivy\uix\floatlayout.py", line 65, in __init__ super(floatlayout, self).__init__(**kwargs) file "c:\users\sherl\appdata\local\programs\python\python36-32\lib\site-packages\kivy\uix\layout.py", line 76, in __init__ super(layout, self).__init__(**kwargs) file "c:\users\sherl\appdata\local\programs\python\python36-32\lib\site-packages\kivy\uix\widget.py", line 345, in __init__ builder.apply(self, ignored_consts=self._kwargs_applied_init) file "c:\users\sherl\appdata\local\programs\python\python36-32\lib\site-packages\kivy\lang\builder.py", line 451, in apply self._apply_rule(widget, rule, rule, ignored_consts=ignored_consts) file "c:\users\sherl\appdata\local\programs\python\python36-32\lib\site-packages\kivy\lang\builder.py", line 612, in _apply_rule e), cause=tb) kivy.lang.builder.builderexception: parser: file "<inline>", line 39: ... 37: on_press: root.manager.current = 'form' 38: button: >> 39: text: 'shift out' if shift == true else 'shift in' 40: on_press: 41: if shift: shiftout() ... builderexception: parser: file "<inline>", line 39: ... 37: on_press: root.manager.current = 'form' 38: button: >> 39: text: 'shift out' if shift == true else 'shift in' 40: on_press: 41: if shift: shiftout() ... nameerror: name 'shift' not defined file "c:\users\sherl\appdata\local\programs\python\python36-32\lib\site-packages\kivy\lang\builder.py", line 249, in create_handler return eval(value, idmap), bound_list file "<string>", line 39, in <module> file "c:\users\sherl\appdata\local\programs\python\python36-32\lib\site-packages\kivy\lang\builder.py", line 597, in _apply_rule rctx['ids']) file "c:\users\sherl\appdata\local\programs\python\python36-32\lib\site-packages\kivy\lang\builder.py", line 254, in create_handler cause=tb)
you have following errors:
- change "from kivy import app" "from kivy.app import app"
- add "from kivy.properties import booleanproperty"
- replace "shift = false" "shift = booleanproperty(false)"
- remove references "global shift"
i have separated program python program , kv file shown below.
modifed main.py
import sqlalchemy import os import datetime kivy.app import app kivy.properties import booleanproperty kivy.uix.screenmanager import screenmanager, screen admincode = "..." # sql functions # incomplete of # shift pulled database shift = booleanproperty(false) def userlogin(id='unfilled', password='unfilled'): global user global localhost_enabled if id == "localtest" , password == admincode: user = id localhost_enabled = true return true elif id == "servertest" , password == admincode: user = id localhost_enabled = false return true def userlogout(): user = '' def shiftin(): shift = true def shiftout(): shift = false def submitform(startcash=0, endcash=0): netcash = endcash - startcash print("netcash = {0}".format(netcash)) def shiftgetter(): if shift: return "shift out" else: return "shift in" class loginscreen(screen): pass class homescreen(screen): pass class formscreen(screen): pass sm = screenmanager() sm.add_widget(loginscreen(name='login')) sm.add_widget(homescreen(name='home')) sm.add_widget(formscreen(name='form')) class realapp(app): def build(self): return sm if __name__ == '__main__': realapp().run() real.kv
#:kivy 1.10.0 <loginscreen>: boxlayout: label: text: 'id:' textinput: id: logininputuser text: '' multiline: false label: text: "password:" textinput: id: logininputpassword text: '' password: true multiline: false button: text: 'login' on_press: if userlogin(logininputuser.text, logininputpassword.text): loginvalidationtext.text = '' if userlogin(logininputuser.text, logininputpassword.text): root.manager.current = 'home' else: loginvalidationtext.text = 'invalid username or password' label: text: '' id: 'loginvalidationtext' <homescreen>: boxlayout: button: text: 'logout' on_press: userlogout() root.manager.current = 'login' button: text: 'open submission form' on_press: root.manager.current = 'form' button: text: 'shift out' if shift == true else 'shift in' on_press: if shift: shiftout() else: shiftin() <formscreen>: boxlayout: button: text: 'back menu' on_press: root.manager.current = 'home' label: text: 'start money:' textinput: id: startcash text: '' multiline: false label: text: 'end money:' textinput: id: endcash text: '' multiline: false button: text: 'submit' on_press: submitform(startcash = int(startcash.text), endcash = int(endcash.text))
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