Create launchers in Linux with Python 3.X

# coding: utf-8

try:
    import sys, traceback
    from os import system, chdir, path, environ
    from tkinter import *
    from tkinter import filedialog
except ImportError:
    print("\033[1;31mErro de importação, cheque os módulos descritos no arquivo README\n")


class Janela():
    def __init__(self, master):
        frame_one = Frame()
        frame_one.pack(side=TOP, pady=5)
        frame_two = Frame()
        frame_two.pack(side=TOP, pady=5)
        frame_three = Frame()
        frame_three.pack(side=TOP, pady=5)
        frame_four = Frame()
        frame_four.pack(side=TOP, pady=5)
        frame_five = Frame()
        frame_five.pack(side=TOP, pady=5)
        frame_six = Frame()
        frame_six.pack(side=TOP, pady=5)
        frame_seven = Frame()
        frame_seven.pack(side=TOP, pady=5)
        frame_eight = Frame()
        frame_eight.pack(side=TOP, pady=5)
        #VERSAO
        version_lb = Label(frame_one, text="[*] Versão: ")
        version_lb.grid(column=0, row=0)
        self.version_entry = Entry(frame_one)
        self.version_entry.grid(column=1, row=0)
        #NOME
        name_lb = Label(frame_two, text="[*] Nome: ")
        name_lb.grid(column=1, row=1)
        self.name_entry = Entry(frame_two)
        self.name_entry.grid(column=2, row=1)
        #NOME GENÉRICO
        generic_name_lb = Label(frame_three, text="[*] Genérico: ")
        generic_name_lb.grid(column=2, row=2)
        self.generic_name_entry = Entry(frame_three)
        self.generic_name_entry.grid(column=3, row=2)
        #COMENTÁRIO
        comment_lb = Label(frame_four, text="[-] Comentário: ")
        comment_lb.grid(column=4, row=3)
        self.comment_entry = Entry(frame_four)
        self.comment_entry.grid(column=5, row=3)
        #LOCAL DE EXECUÇÃO
        execution_lb = Label(frame_five, text="[*] Execução: ")
        execution_lb.pack(side=LEFT)
        execution_text = StringVar()
        self.execution_entry = Entry(frame_five, textvariable=execution_text)
        self.execution_entry.pack(side=LEFT)
        execution_button = Button(frame_five, text="Abrir arquivo", command=self.conseguir_filename_exe)
        execution_button.pack(side=LEFT, padx=10)
        #ÍCONE
        icon_lb = Label(frame_six, text="[-] Ícone: ")
        icon_lb.pack(side=LEFT)
        self.icon_entry = Entry(frame_six)
        self.icon_entry.pack(side=LEFT)
        icon_button = Button(frame_six, text="Buscar ícone", command=self.conseguir_filename_ico)
        icon_button.pack(side=LEFT, padx=10)
        #CATEGORIA
        categories_lb = Label(frame_seven, text="[-] Categoria: ")
        categories_lb.pack(side=LEFT)
        self.categories_entry = Entry(frame_seven)
        self.categories_entry.pack(side=LEFT)
        #REUNINDO VARS
        version = self.version_entry.get()
        name = self.name_entry.get()
        generic_name = self.generic_name_entry.get()
        comment = self.comment_entry.get()
        execution = self.execution_entry.get()
        icon = self.icon_entry.get()
        categories = self.categories_entry.get()
        #CRIAR LANÇADOR
        criar_lanc = Button(frame_eight, text="Criar lançador", command=self.criar_lancador)
        criar_lanc.pack(side=LEFT)
    def conseguir_filename_exe(self, event=None):
        user = environ['HOME']
        filename = filedialog.askopenfilename(initialdir=user, title="Escolha um arquivo")
        self.execution_entry.delete(0, END)
        self.execution_entry.insert(0, filename)
        return filename
    def conseguir_filename_ico(self, event=None):
        filename = filedialog.askopenfilename(initialdir="/usr/share/icons/", filetypes =(("Imagem PNG", "*.png"),("All Files","*.*")), title="Escolha um arquivo")
        self.icon_entry.delete(0, END)
        self.icon_entry.insert(0, filename)
        return filename
    def criar_link_simbolico(self, caminho, nome):
        command = 'ln -s %s /usr/bin/%s' % (caminho, nome)
        system(command)
        if path.isfile('/usr/bin/' + nome):
            return "/usr/bin/"+nome
        else:
            return False

    def criar_lancador(self):
        name = self.name_entry.get()
        version = self.version_entry.get()
        icon = self.icon_entry.get()
        execution = self.execution_entry.get()
        categories = self.categories_entry.get()
        generic_name = self.generic_name_entry.get()
        print("\033[1;33mCriando lançador...\n")
        execution = self.criar_link_simbolico(execution, name)
        if execution:
            print("\033[1;32mLink simbólico criado com sucesso!\n")
        else:
            print("\033[1;31mLink simbólico não foi criado...\n")
        linhas_padrao = ('''
[Deskop Entry]
Version={}
Name={}
GenericName={}
Exec={}
Icon={}
Type=Application
Categories={}
''').format(version, name, generic_name, execution, icon, categories)
        print("\033[1;40mLinhas padrão: %s" % (linhas_padrao))
        chdir('/usr/share/applications')
        filename = name + '.desktop'
        launcher = open(filename, 'w')
        launcher.write(linhas_padrao)
        launcher.close()

    def checar_lancador(name):
        chdir('/usr/share/applications')
        filename = name + '.desktop'
        if path.isfile(filename):
            return True
        else:
            return False


def main():
    print("\n\033[1;32mExecutando...\n")
    raiz = Tk()
    j1 = Janela(raiz)
    raiz.minsize(400, 300)
    raiz.title('Criar lançador')
    raiz.mainloop()
try:
    main()
except KeyboardInterrupt:
    print("\033[1;31mSaindo do programa, até mais...\n")
except PermissionError:
    print("\033[1;31mErro de permissão. Logue como root e abra o programa.\n")
except Exception:
    print("\033[1;31mA exceção foi %s\n" % (traceback.print_exc(file=sys.stdout)))