Python integration of Objects in others - python-3.x

Question

fix: I moved an invoke of a Radiobutton from the init of my view to the controller like this:
class Controller(object):
def __init__(self):
self.model = Model()
print('start init of View')
self.view = View(self.importieren, self.exportieren, self.beenden, self.J5, self.J6, self.J7, self.J8, self.J9,
self.J10, self.J11, self.J12, self.JA, self.tabelle_sorti, self.hinzufugen, self.zuordnen,
self.ande, self.JA, self.model.ausgabe('projekte'), self.tabelle_update, self.a1, self.a2, self.a3,
self.a4, self.a5, self.a6, self.a7)
print('done init')
self.wahlen = ('sErst', 'sZweit', 'sDritt')
self.delimiter = {'imp_s': None, 'imp_p': None, 'exp': None}
self.dchosen = None
self.slcsv = 'schuelerliste.csv'
self.plcsv = 'projektliste.csv'
self.double = False
self.andernx = ""
self.view.radios['jahrg-Alle'].invoke()
self.tabelle()
self.view.table['main'].bind('<Double-Button-1>', self.treevent)
# Erstimportierung
if self.model.ausgabe('schueler'):
self.importieren(True)
self.view.mainloop()
def tabelle_update(self, fetchshlr=None, fetchprj=None):
print('start update')
if fetchshlr is None:
fetchshlr = self.model.ausgabe('schueler')
if fetchprj is None:
fetchprj = self.model.ausgabe('projekte')
self.view.tableup(fetchshlr, fetchprj)
This invoke called the function, before View was ready and so caused the error. Thanks for the Help
I tried to not ask a question hear, but after hours of searching I have to.
I am currently working on a programm and recently splitted the main file in three in style of the MVC-Scheme. And I have one function to update a Treeview working as a table. But this function (and only that one!), says:
Exception in Tkinter callback\
Traceback (most recent call last):\
File "C:\Users\...\Python38\lib\tkinter\__init__.py", line 1883, in __call__\
return self.func(*args)\
File "C:/Users/.../Controller.py", line 184, in tabelle_update\
self.view.table['main'].tag_configure(i[0], background='white')\
AttributeError: 'Controller' object has no attribute 'view'
I already tried to use lambda (and if you ask why, because someone said it in the internet) and it just prevented the function to work at all. Also I think it has something todo with this:
{'model': <Model.Model object at 0x0000018CA8068160>, 'view': <View.View object .>, ...}
this is an extract of the attributes ditionary and I think it has something to do with the missing at 0x... part in 'view' as seen in 'model'
Please Help me to get this up and running
And here are my important code parts (if you need more, pls write)
note that the diffrent classes are in diffrent files and are properly imported
Major Changes in programmcode under tabelle_update and under the View class tableup
I tried to move the View heavy parts to View, didn't fix anything.
class Controller(object):
def __init__(self):
self.model = Model()
self.view = View(self.importieren, self.exportieren, self.beenden, self.J5, self.J6, self.J7, self.J8, self.J9,
self.J10, self.J11, self.J12, self.tabelle_update, self.tabelle_sorti, self.hinzufugen,
self.zuordnen, self.ande, self.tabelle_update, self.model.ausgabe('projekte'),
self.tabelle_update, self.a1, self.a2, self.a3, self.a4, self.a5, self.a6, self.a7)
self.wahlen = ('sErst', 'sZweit', 'sDritt')
self.delimiter = {'imp_s': None, 'imp_p': None, 'exp': None}
self.dchosen = None
self.slcsv = 'schuelerliste.csv'
self.plcsv = 'projektliste.csv'
self.double = False
self.andernx = ""
self.tabelle()
self.view.table['main'].bind('<Double-Button-1>', self.treevent)
# Erstimportierung
if self.model.ausgabe('schueler'):
self.importieren(True)
print(self.__dict__)
self.view.mainloop()
def tabelle(self):
fetch = self.model.ausgabe('schueler')
self.view.shlr_tabelle(fetch)
def tabelle_update(self, fetchshlr=None, fetchprj=None):
print('start update')
if fetchshlr is None:
fetchshlr = self.model.ausgabe('schueler')
if fetchprj is None:
fetchprj = self.model.ausgabe('projekte')
self.view.tableup(fetchshlr, fetchprj)
class View(ttkthemes.ThemedTk):
def __init__(self, imp, exp, bee, j5, j6, j7, j8, j9, j10, j11, j12, ja, tabsort, hin, zord, ande, scht,
prjt, aktutable, a1, a2, a3, a4, a5, a6, a7):
# print(ttkthemes.THEMES) # zum Ausgeben der verfügbaren Themes
ttkthemes.ThemedTk.__init__(self, theme='breeze')
self.title("Projektwochenverwaltungsprogramm")
self.geometry('800x300')
self.minsize(800, 300)
self.resizable(width=True, height=True)
# bestimmen der Callbacks
self.callback_imp = imp
self.callback_exp = exp
self.callback_bee = bee
self.radiocom = {'jahrg': [j5, j6, j7, j8, j9, j10, j11, j12, ja], 'ande': [a1, a2, a3, a4, a5, a6, a7]}
self.tabelle_sorti = tabsort
self.callback_aktut = aktutable
self.callback_zord = zord
self.callback_hin = hin
self.callback_ande = ande
self.callback_scht = scht
self.callback_prjt = prjt
# Tabelle
self.scrollbars = {'main': Scrollbar(self.rahmen[2], orient="vertical")}
self.table = {'main': Treeview(self.rahmen[2], yscrollcommand=self.scrollbars['main'].set, height=200)}
self.scrollbars['main'].pack(side=RIGHT, fill=BOTH)
self.rahmen[1].pack()
self.rahmen['popup_pro'].pack(fill=X)
self.rahmen[2].pack(fill=BOTH, expand=True)
def shlr_tabelle(self, fetch):
ml = ['ID']
for name in self.names['schueler']:
ml.append(name)
ml.append('Zugeordned zu')
self.table['main']['columns'] = ml
self.table['main']['show'] = 'headings'
for i in range(len(ml)):
self.table['main'].column(ml[i], width=self.width['schueler'][i], minwidth=self.width['schueler'][i])
for i in range(len(ml)):
self.table['main'].heading(ml[i], text=ml[i], command=lambda col=i: self.tabelle_sorti(col, False, 'main'))
for t in fetch:
self.table['main'].insert('', t[0], t[0], values=t) # , tags=t[0]
self.scrollbars['main'].config(command=self.table['main'].yview)
self.table['main'].pack(fill=BOTH)
def prj_tabelle(self, fetch):
self.top['prjt'] = Toplevel()
self.top['prjt'].title('Projekte Liste')
self.top['prjt'].geometry('800x300')
self.top['prjt'].minsize(800, 300)
self.scrollbars['prj'] = Scrollbar(self.top['prjt'], orient="vertical")
self.table['prj'] = Treeview(self.top['prjt'], yscrollcommand=self.scrollbars['prj'].set, height=200)
ml = ['ID']
for name in self.names['projekte']:
ml.append(name)
self.table['prj']['columns'] = ml
self.table['prj']['show'] = 'headings'
for i in range(len(ml)):
self.table['prj'].column(ml[i], width=self.width['projekte'][i], minwidth=self.width['projekte'][i])
for i in range(len(ml)):
self.table['prj'].heading(ml[i], text=ml[i], command=lambda col=i: self.tabelle_sorti(col, False, 'prj'))
for t in fetch:
self.table['prj'].insert('', t[0], t[0], values=t) # , tags=t[0]
self.scrollbars['prj'].config(command=self.table['prj'].yview)
self.scrollbars['prj'].pack(side=RIGHT, fill=BOTH)
self.table['prj'].pack(fill=BOTH)
def tableup(self, fetchshlr, fetchprj):
print('läuft')
for i in fetchshlr:
self.view.table['main'].tag_configure(i[0], background='white')
self.view.table['main'].delete(*self.view.table['main'].get_children())
for t in fetchshlr:
self.view.table['main'].insert('', t[0], t[0], values=t) # , tags=t[0]
for ele in fetchshlr:
if ele[8] is None:
self.view.table['main'].tag_configure(ele[0], background='#fa6150')
try:
for i in fetchprj:
self.view.table['prj'].tag_configure(i[0], background='white')
self.view.table['prj'].delete(*self.view.table['prj'].get_children())
for t in fetchprj:
self.view.table['prj'].insert('', t[0], t[0], values=t) # , tags=t[0]
failed = self.model.prj_aktu()
for prj in failed:
self.view.table['prj'].tag_configure(prj, background='#fa6150')
except KeyError:
pass

Answer 1

You have to ask yourself when self.view is fully initialized, and when you're trying to access self.view. The error is telling you that you're trying to access it before you define it.
You should be able to visualize this by adding print statements like so:
print("before self.view is defined")
self.view = View(...)
print("after self.view is defined")
and then:
print("using self.view...")
self.view.table['main'].tag_configure(i[0], background='white')