python - How can I display the contents of a variable that uses .sum() in a label using tkinter

Question

I'm creating a counter to count how many empty cells there are when a user uploads a CSV file. I am also using treeview to display the contents of the CSV. The print("There are", emptyCells.sum(), "empty cells") works and prints the number to the console but I want to display this in a label so the user can view this in the GUI. It is not displaying anything but a "row" is being added to the application after a file has been uploaded where the label should be as everything moves down but no contents are being inserted into the label.

emptyCells = (df[df.columns] == " ").sum()

# print("There are", emptyCells.sum(), "empty cells")

tree.pack(side=BOTTOM, pady=50)
messagebox.showinfo("Success", "File Uploaded Successfully")

stringVariable = StringVar()
printVariable = ("There are", emptyCells.sum(), "empty cells")
#print(printVariable)

stringVariable.set(printVariable)
lbl = Label(windowFrame, textvariable=stringVariable, font=25)
lbl.pack()

question from:https://stackoverflow.com/questions/65923722/how-can-i-display-the-contents-of-a-variable-that-uses-sum-in-a-label-using-t

Answer 1

According to your question you want to update your tkinter label by a button click. You would do this with something like this:

from tkinter import *
from tkinter import messagebox

root = Tk(className="button_click_label")
root.geometry("200x200")

messagebox.showinfo("Success","Test")
emptyCells = (df[df.columns] == " ").sum()
l1 = Label(root, text="Emptycells?")

def clickevent():
    txt = "there are", emptyCells
    l1.config(text=txt)


b1 = Button(root, text="clickhere", command=clickevent).pack()

l1.pack()

root.mainloop()

It is not tested with the pandas library but should work for you!