Tkinter - Counting lines in a Text widget with word wrapping

Question

I'd like to know how to get the number of lines in a Tkinter Text widget that has word wrap enabled.

In this example, there are 3 lines in the text widget :

from Tkinter import *

root = Tk()
text = Text(root, width = 12, height = 5, wrap = WORD)
text.insert(END, 'This is an example text.')
text.pack()

root.mainloop()

But methods that work for non-wrapped text, like :

int(text_widget.index('end-1c').split('.')[0]) 

will return 1 instead of 3. Is there another method that would properly count wrapped lines (and return 3 in my example) ?

Thanks for your help !

Answer 1

I know this is very old but, I wanted to throw a possible current(2022) answer for those working with wrapping lines on windows 10.

import tkinter as tk


def inspect_wrapline(event=None):
  start = f"{tk.INSERT} linestart"
  end   = f"{tk.INSERT} lineend"
  counter = event.widget.count(start, end, "displaylines")
  
  print("number of lines after first line", counter)


  start = f"{tk.INSERT} display linestart"
  end   = f"{tk.INSERT} display lineend +1c"
  dline = event.widget.get(start, end)

  print("Text on the displayline", dline)


root_window = tk.Tk()
text_widget = tk.Text(root_window)
text_widget.pack()
text_widget.insert("This is an example text.")
text_widget.bind("<Control-l>", inspect_wrapline)

root_window.mainloop()

Output:

insert @ line 0: (2,) This is an

insert @ line 1: (2,) example

insert @ line 2: (2,) text.

Terminology:

Displayline: a single line of text from left to right in the widget viewing area.

Logic line: a string of text regardless of wraps. There is only 1 'logic line' in a line that wraps (or at least that is my understanding.).

Note:

Even though the option is a "displayline" it will yield a displayline even if it is not currently visible in the viewing area.

Hope this helps some wayward tkinter users trying to figure out wrapping lines.