Im trying to get a text from a tkinter entry and put it inside a dictionary but I get PY

the code below is part of a class.

def expected_callback(self,expected_val_var,index,mode):
      dictionary[self.row][3] = expected_val_var
def dataType callback(self,event):
    expected_val_var = StringVar()
    expected_val_var.trace("w",self.expected_callback)
    expected_val = Entry(self.root, width=20, textvariable= expected_val_var)
    expected_val.insert(0,"Expected value")
    expected_val.grid(row=self.row,column=self.col 2)

Im trying to get a text from a tkinter entry and put it inside a dictionary but I get PY_VAR(some number) instead.

I also tried dictionary[self.row][3] = expected_val_var.widget.get() but it said that str has no get(). What can I do to get the users input from expected_val entry into the dictionary?

CodePudding user response：

It is because the first argument of the callback for .trace() is the internal name (string) of the tkinter variable.

If you want to pass expected_val_var (instance of StringVar) to expected_callback(), use lambda on .trace() instead:

def expected_callback(self, expected_val_var):
    dictionary[self.row][3] = expected_val_var.get()

def dataType_callback(self, event):
    ...
    expected_val_var.trace("w", lambda *args: self.expected_callback(expected_val_var)
    ...

CodePudding user response：

not sure, shouldn't it be

dictionary[self.row][3] = expected_val.get()

but I would rename

expected_val

to something like

entry_field

for to be clearer that it is the input element which value is to be red

and are you sure about

deff

, I know it as

def