tkinter

class StColors(object):
    orange       = '#f5be2e'
    bright_green = '#b7f731'
    dark_grey    = '#191919'
    mid_grey     = '#323232'
    light_grey   = '#c8c8c8'


def create_widgets(self, master):
    style = Style()
            style.theme_create("st_app", parent="alt", settings={
                ".": {"configure": {"background": StColors.light_grey,
                                    "foreground": 'black',
                                    "relief": "flat",
                                    "highlightcolor": StColors.bright_green}},

                "TLabel": {"configure": {"foreground": StColors.bright_green,
                                         "padding": 10,
                                         "font": ("Calibri", 12)}},

                "TNotebook": {"configure": {"padding": 5}},
                "TNotebook.Tab": {"configure": {"padding": [25, 5],
                                                "foreground": "white"},
                                  "map": {"background": [("selected", StColors.mid_grey)],
                                          "expand": [("selected", [1, 1, 1, 0])]}},

                "TCombobox": {"configure": {"selectbackground": StColors.dark_grey,
                                            "fieldbackground": "white",
                                            "background": StColors.light_grey,
                                            "foreground": "black"}},

                "TButton": {"configure": {"font": ("Calibri", 13, 'bold'),
                                          "padding" : [10, 8],  "width" : 30, "height" : 2,
                                          "background": StColors.mid_grey,
                                          "foreground": StColors.bright_green},
                            "map": {"background": [("active", StColors.bright_green)],
                                    "foreground": [("active", 'black')]}},

                "TEntry": {"configure": {"foreground": "black"}},
                "Horizontal.TProgressbar": {"configure": {"background": StColors.mid_grey}}
            })
            style.theme_use("st_app")

..............


...

 self.menu = Menu(master)
        self.menuCadastro = Menus(self.menu, 'CADASTRAR', [
            ("Categorias", self.cad_Cat),
            ("Lançamentos", self.cadastraContas),
            ("Faturas Cartôes", self.cad_Faturas),
            ("Tipos Pagamentos", self.cad_Tipos_Pgto),
            ("Sair", master.destroy),
        ])

        self.menuConsulta = Menus(self.menu, 'CONSULTAR', [
            ("Todas as Contas", self.pesquisa_Contas),
            ("Faturas Cartões", self.cad_Faturas),
            ("Todas as Categorias", self.pesquisa_Cat),
            ("Contas/Filtro", self.lista_Personalizada),
            ("Categorias/Fitro", self.lista_PersonaCat),
            ("Tipos/Pagamentos", self.lista_tipos_pgto),

        ])

        self.menuSaida = Menus(self.menu, 'RELATORIOS', [
            ("Excel Mês Atual", self.gera_planilha),
        ])

        self.menuEdita = Menus(self.menu, 'AJUDA', [
            ("VERSAO 1.1", ''),
            ("HELPDESK", self.help_Desk),
            ("MANUAL", ''),
        ])




...





class Menus(Sistema):

    def __init__(self, menu, label_cascade, tuplas_cascade):
        self.tuplas_cascade = tuplas_cascade
        self.menu = menu

        self.menuCascade = Menu(self.menu)

        for nome, metodo in self.tuplas_cascade:
            self.menuCascade.add_command(label=nome, command=metodo)

        self.menu.add_cascade(label=label_cascade, menu=self.menuCascade)