for i in -loop with Entry widget - python-3.x

Question

Trying to get hand of tkinter, widgets and neighboring areas.
Keep getting an error - and after hours of googling, not answers pop up.
For some reason this loop shows all of the filenames in the entry-line - rather than one at a time... - what am I doing wrong ?
Thanks for helping out !
__author__ = 'Orphan Black'
import os
import sys
from tkinter import *
from tkinter.scrolledtext import *
import time
class PermFrame(Frame):
def __init__ (self, master):
super(PermFrame, self).__init__(master)
self.grid()
self.create_widgets()
self.createLable()
menu = Menu()
self.master.config(menu=menu)
file = Menu(menu)
file.add_command(label="Settings", command=self.setting_menu)
file.add_command(label="Exit", command=self.client_exit)
menu.add_cascade(label="File", menu=file)
about = Menu(menu)
about.add_command(label="Info")
menu.add_cascade(label="About", menu=about)
self.enpath_label = Label(self, text = "Enter path: ")
self.enpath_label.grid(row = 2, column = 2, sticky = W, padx=5, pady=5)
self.path_ent = Entry(self, width=52)
self.path_ent.grid(row = 2, column = 3, sticky = W, padx=5, pady=5)
self.sub_bttn = Button(self, text = "Check", command = self.submit_path)
self.sub_bttn.grid(row = 2, column = 4, sticky = W, padx=5, pady=5)
self.run_bttn = Button(self, text = "Run", command = self.run_prg)
self.run_bttn.grid(row = 2, column = 5, sticky = W, padx=5, pady=5)
self.orgfn_label = Label(self, text = "Original name: ")
self.orgfn_label.grid(row = 4, column = 2, sticky = W, padx=5, pady=5)
self.org_filename = Text(self, width=37, height = 1, wrap = WORD)
self.org_filename.grid(row=4, column = 3, columnspan = 5, sticky = W, padx=5, pady=5)
self.newfn_label = Label(self, text = "New name: ")
self.newfn_label.grid(row = 5, column = 2, sticky = W, padx=5, pady=5)
self.new_filename = Text(self, width=37, height = 1, wrap = WORD)
self.new_filename.grid(row=5, column = 3, columnspan = 5, sticky = W, padx=5, pady=5)
self.constxt_label = Label(self, text = "Console ")
self.constxt_label.grid(row = 6, column = 2, sticky = W, padx=5, pady=0)
self.console_txt = ScrolledText(self, width=71, height = 5, wrap = WORD)
self.console_txt.grid(row=7, column = 2, columnspan = 4, sticky = W, padx=5, pady=0)
def submit_path(self):
# console = console
time_date = time.strftime("%H:%M:%S")
contents = self.path_ent.get()
message = ("\n{}: Trying {}...".format(time_date, contents))
self.console_txt.insert(END, message)
try:
os.chdir(contents)
msgok = ("\n{}: The path {}, is valid".format(time_date, contents))
prg_start = ("\n{}: Program starting...".format(time_date, contents))
self.console_txt.insert(END, msgok)
except (ValueError, RuntimeError, TypeError, NameError, FileNotFoundError):
notok_mssg= ("\n{}: The path you entered is not valid...Enter a new path".format(time_date))
self.console_txt.insert(END,notok_mssg,)
def run_prg(self):
os.listdir(self.path_ent.get())
for file in os.listdir(self.path_ent.get()):
#print(file)
self.org_filename.insert(END,(file))

Answer 1

It seems like you want your entry widget to display the contents of os.listdir one at a time as you iterate over it changing the entry widgets value upon each iteration.
But, as you're iterating you keep inserting things into the entry widget at the last index in the Entry widget. You never delete the Entry widget's contents so you just see this is one big mesh of text.
Sticking with the Entry widget... you can do this:
self.org_filename.delete(0, END) #Could also use "end" instead of END
#insert new text
If all you want is this updating text behavior, then you should really just use a label. With a label it's easier.
some_label['text'] = new_filename
Additional notes:
Don't override keywords
You should use a name other than file in your forloop. It's a built-in keyword. Whenever you do this you're overriding functionality.
Don't use import *
With small scripts, it's not much of an issue, but as you start expanding your programs it becomes very easy to have clashing imports / unexpected behavior and in general it becomes a lot harder to keep track of things / debug.
e.g. - If we did import tkinter as some_name and we used some_name.* where * would be anything from tkinter you wanted to use such as tk.END as above, or even the widget classes it' a lot easier to keep track of. We know exactly where everything comes from.
Blocking Tk's main event loop
If you have a large directory then iterating like this will block Tk's main event loop. Consider using a separate thread instead.