Changing Syntax for List Entries in Python (Tkinter)

Question

I have a small application that takes in a string of numbers, runs them through a function, and spits out the output. For the list entry I have the following set up:

 def create_widgets(self):
        self.entryLabel = Label(self, text="Please enter a list of numbers:")
        self.entryLabel.grid(row=0, column=0, columnspan=2)      

        self.listEntry = Entry(self)
        self.listEntry.grid(row=0, column=2, sticky=E)

However, this only allows me to input strings (e.g. 123451011) while I would like it to be able to recognize individual numbers (e.g. 1,2,3,4,5,10,11). I suppose essentially what I'm asking is to be able to use a list instead of a string. Is there a way to change self.listEntry to handle this? Is there something I can add into my function instead (which currently inputs valueList = list(self.listEntry.get()))? Thanks!

EDIT:

I defined a function as follows:

    def Function(self):
        valueList = list([int(x) for x in self.listEntry.get().split(",")])
        x = map(int, valueList)

Which then continues to outline how to run the numbers and tells the program to give the output.

score 2 · Accepted Answer · 2013-08-17 17:26:49Z

2

You can do something like this:

import Tkinter as tk

root = tk.Tk()

entry = tk.Entry()
entry.grid()

# Make a function to go and grab the text from the entry and split it by commas
def get():
    '''Go and get the text from the entry'''

    print entry.get().split(",")

# Hook the function up to a button
tk.Button(text="Get numbers", command=get).grid()

root.mainloop()

Or, if you want them all to be integers, change this line:

print entry.get().split(",")

to this:

print map(int, entry.get().split(","))

edited Aug 17, 2013 at 17:26

answered Aug 17, 2013 at 16:49

user2555451

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4 Comments

114 Over a year ago

I'm not entirely sure I follow. Is the idea to create a separate button to get numbers in the right format? Thanks for your help!

user2555451 Over a year ago

@Stopwatch - Yes. Make a button that is hooked up to a function. The function should grab the text from the entry and then split it by commas. The result returned by this function will be a list containing what you want.

114 Over a year ago

Thanks iCodez, both yours and Bryan's answers were very helpful.

Bryan Oakley Over a year ago

@Stopwatch: you don't need a button per se, but obviously there must be some code somewhere that is using the data from the entry widget. Wherever that code is -- whether called from a button or not -- you need to convert the data to whatever format you need. The button in this code is just a convenient way to give a short example.

user1612868 · Accepted Answer · 2013-08-17 16:33:29Z

0

You can just use split on the input, and then map int to the list that that generates.

self.listEntry = [int(x) for x in Entry(self).split(',')]

answered Aug 17, 2013 at 16:33

user1612868

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11 Comments

user2555451 Over a year ago

This won't work at all because Entry doesn't have a split method.

114 Over a year ago

@user1612868 Thanks. So should the edited version look something like the above edit? Edit: Nevermind, based on what iCodez has just said!

Bryan Oakley Over a year ago

Your description is correct, but the code is all wrong. To get the values as a list of integers you would do [int(x) for x in self.listEntry.get().split(",")]. What your code does is create a new entry widget, then splits the entry widget name (which is what the string representation of an entry widget object is).

114 Over a year ago

@BryanOakley Where would I place that sort of thing? Would it be in place of self.listEntry = Entry(self)?

Bryan Oakley Over a year ago

@Stopwatch: there is nothing in your code to prevent the user from entering 1,2,3,4,5. Have you actually tried to run your own program?

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