Hello guys I need to check if this label empty or not empty:
If not empty active some button.
I get the filename from another method.
this is the code :
lb = Label(self, text="", background='white')
lb.config(text=excel_name)
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You should look into official documentation. docs.python.org/3/library/tkinter.ttk.htmlAman– Aman2020-05-25 23:35:41 +00:00Commented May 25, 2020 at 23:35
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Does this answer your question? How to get the Tkinter Label text?stovfl– stovfl2020-05-26 08:29:54 +00:00Commented May 26, 2020 at 8:29
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I see all this, Nothing work this not entry text the is the display textjohn– john2020-05-26 11:25:47 +00:00Commented May 26, 2020 at 11:25
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1 Answer
Here is a simple app that demonstrates a button being activated or disabled based on whether a label's text is the empty string or not:
import tkinter as tk
class App(tk.Tk):
def __init__(self, **kwargs):
super().__init__(**kwargs)
self.lb = tk.Label(self)
self.lb.pack()
self.entry = tk.Entry(self)
self.entry.pack()
self.button = tk.Button(self, text="A button", command=lambda: print("Button pressed"))
self.button["state"] = tk.DISABLED
self.button.pack()
self.bind("<Return>", self.enter_pressed)
def enter_pressed(self, event):
self.lb.config(text=self.entry.get())
self.button["state"] = tk.NORMAL if self.lb["text"] else tk.DISABLED
app = App()
app.mainloop()
The window contains a label, then a text entry box, then a button. If you type text into the text entry box then press the enter key (return key), the label text is set to the text in the text box, and the button is set to either enabled or disabled depending on if the label text is empty or not.
The key line here is:
self.button["state"] = tk.NORMAL if self.lb["text"] else tk.DISABLED
This sets the button state to either tk.NORMAL (enabled) or tk.DISABLED depending on whether the label text (self.lb["text"]) is the empty string or not.
7 Comments
john
Nothing work this not entry text the is the display text
Oli
@john I'm sorry, I don't understand your problem. You asked for how to get text from a label, and this code will do that for you. Maybe update your question with more detail?
john
Yes this code is give text from label but , I need to create function to know if this label is not empty click some button
Oli
Do you mean you want a function which, when you call it, simulates a button press if the label text is empty? e.g. if a have a label
lb and a button button, if lb is empty, then do the command that is bound to button?john
Yeh if lb empty don't deactivate button and if lb not empty active button
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