python 3.x - How do I get the Entry Widget to pass into a function? -

i'm sure simple mistake , i've localized specific spot in code:

class newproduct(tk.frame):      def __init__(self, parent, controller):         tk.frame.__init__(self, parent)                          tlabel = ttk.label(self, text="title: ", font=norm_font).grid(row=0, padx=5, pady=5)         qlabel = ttk.label(self, text="quantity: ", font=norm_font).grid(row=1, padx=5, pady=5)         plabel = ttk.label(self, text="price: $", font=norm_font).grid(row=2, padx=5, pady=5)         te = ttk.entry(self).grid(row=0, column=1, padx=5, pady=5) # add validation in future         qe = ttk.entry(self).grid(row=1, column=1, padx=5, pady=5)         pe = ttk.entry(self).grid(row=2, column=1, padx=5, pady=5)          savebutton = ttk.button(self, text="save", command=lambda: self.save(self.te.get(), self.qe.get(), self.pe.get()))         #why wrong!!!!!???!?!?!?!?!?         savebutton.grid(row=4, padx=5)         cancelbutton = ttk.button(self, text="cancel", command=lambda: popupmsg("not functioning yet."))         cancelbutton.grid(row=4, column=1, padx=5)      def save(self, title, quantity, price):         conn = sqlite3.connect("comicenv.db")         c = conn.cursor()         c.execute("insert cdata(unix, datestamp, title, quantity, price) values (?,?,?,?,?)",                   (time.time(), date, title, quantity, price))         conn.commit()         conn.close() 

i've tried few different things including: savebutton = ttk.button(self, text="save", command=lambda: self.save(te.get(), qe.get(), pe.get()))

i'm trying user input entry widget , store in sqlite3 database.

this traceback:

exception in tkinter callback traceback (most recent call last):   file "c:\python34\lib\tkinter\__init__.py", line 1533, in __call__     return self.func(*args)   file "c:\users\aedwards\desktop\deleteme.py", line 106, in <lambda>     savebutton = ttk.button(self, text="save", command=lambda: self.save(self.te.get(), self.qe.get(), self.pe.get())) attributeerror: 'newproduct' object has no attribute 'te' 

any guys give me appreciated. more information, please let me know.

thanks in advance!

the error telling problem: newproduct object has no attribute named te. have created local variable named te, attribute must create self.te.

also, must call grid in separate statement create widget, because grid(...) returns none, te or self.te none. not solves problem, makes code easier understand, because can put of calls grid in same block of code don't have layout scattered on place.

for example:

def __init__(...):     ...     self.te = ttk.entry(...)     self.qe = ttk.entry(...)     self.pe = ttk.entry(...)     ...     self.te = grid(...)     self.qe = grid(...)     self.pe = grid(...) 

fwiw, recommend not using lambda here. create proper function button call. it's easier write , debug complicated lambda. there's need use lambda in tkinter.

for example:

def __init__(...):     ...     savebutton = ttk.button(..., command=self.on_save)     ...  def on_save(self):     title=self.te.get()     quantity = self.qe.get()     price = self.pe.get()     self.save(title, quantity, price):