def addCustomer():
customerID = customerIDTab2.get()
name = customerNameTab2.get()
result = pos.addCustomer(customerID,name)
if(result['error']==True):
customerResultLabel.configure(fg="red" , text=result['message'])
else:
customerResultLabel.configure(fg="green" , text=result['message'])
quote = pos.getAllCustomersNames()
T.delete('1.0', END)
T.insert(END,quote)
RegistSale.grid(row=5, column=2, sticky=N+S+E+W)
chButton.grid(row=5, column=1, sticky=N+S+E+W)
#SECOND TAB
tab2 = Tab(root, "Customers")
frame1t2=Frame(tab2, bd=3, relief="groove")
label0tab2 = Label(frame1t2, text="List of customers:", font=("Helvetica", 20), fg="black").pack(side=TOP, expand=YES, fill=BOTH)
S = Scrollbar(frame1t2)
T = Text(frame1t2, height=4, width=50)
S.pack(side=RIGHT, fill=Y)
T.pack(side=LEFT, fill=Y)
S.config(command=T.yview)
T.config(yscrollcommand=S.set)
quote = pos.getAllCustomersNames()
T.insert(END, quote)
sep1t2=ttk.Separator(tab2,orient=VERTICAL)
frame2t2=Frame(tab2, bd=3, relief="groove")
label1tab2 = Label(frame2t2, text="Register a Customer:", font=("Helvetica", 20), fg="black").pack(side=TOP, expand=YES, fill=BOTH)
label2tab2 = Label(frame2t2, text="Customer ID: ", font=("Helvetica", 10), fg="black").pack()
customerIDTab2 = Entry(frame2t2 , text="")
customerIDTab2.pack()
label3tab2 = Label(frame2t2, text="Customer Name: ", font=("Helvetica", 10), fg="black")
customerNameTab2 = Entry(frame2t2)
label3tab2.pack()
customerNameTab2.pack()
customerResultLabel = Label(frame2t2, text="")
customerResultLabel.pack()
Button(frame2t2, text="Register new customer", command=addCustomer).pack()