In my source code for a project I am running I have a process that produces a list of strings. I am trying to put this list into a Tkinter listbox for easy sorting, but when I do the list is all inserted into one line and I can't find a way to separate the individual words into a different line on the listbox. Any ideas I am open to anything. Below I have attach an example of what I am trying to do:
from Tkinter import *
app = Tk()
app.geomtery("500x700")
app.title("ListBox")
names = ["Greg", "Earl", "Harry", "Bob"]
box = Listbox(app)
# Right here is where I am stuck
box.insert(END, names)
box.pack()
app.mainloop()
very esay in python, no ?:
just add the item and not the list
# Right here is where I am stuck
for i in names:
box.insert(END, i)
and
app.geometry("500x700")
This is how you could do it:
from Tkinter import *
app = Tk()
app.geometry("500x700")
app.title("ListBox")
names = ["Greg", "Earl", "Harry", "Bob"]
box = Listbox(app)
# Right here is where I am stuck
for name in names:
box.insert(END, name)
box.pack()
app.mainloop()
Related
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()
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!
The problem with the tkinter label is not happening when I try to reproduce the problem, the label shows. The cause must be somewhere else in the code.
I've not got pandas installed so I've summed a list instead. This shows a GUI with two labels when I run it.
import tkinter as tk
emptyCells = [ 1, 1, 1, 1, 1, 1, 1 ] # keep it simple.
windowFrame = tk.Tk()
old = tk.StringVar()
stringVariable = tk.StringVar()
old_print = ("There are", sum(emptyCells), "empty cells") # Returns a tuple
printVariable = "There are {} empty cells".format( sum(emptyCells) ) # Returns a string.
old.set( old_print )
stringVariable.set(printVariable)
lbl_old = tk.Label( windowFrame, textvariable = old )
lbl_old.pack()
lbl = tk.Label(windowFrame, textvariable=stringVariable, font=25)
lbl.pack()
windowFrame.mainloop()
Does this work when you run it? Does it help identify where the problem is in the code which doesn't show the labels?
Don't you have the sum you need already in the emptyCells variable? Why do you need to use the .sum() function again in the print statement?
printVariable = f"There are {emptyCells} empty cells"
I created 12 Entry boxes using a for loop with a default value of N/A. Any change in the text of entry is detected through .trace method.
I want to use reset button to make all the text on the Entry Boxes back to N/A
from tkinter import *
root = Tk()
t_diesel_price_EnF_variable = ["JanVar", "FebVar", "MarVar", "AprVar","MayVar","JuneVar","JulyVar","AugVar","SeptVar", "OctVar", "NovVar", "DecVar"]
t_diesel_price_EnF_values = ["N/A", "N/A","N/A", "N/A","N/A", "N/A","N/A", "N/A","N/A", "N/A","N/A", "N/A"]
def EnFChanging(*events):
for EnF in range(0,len(t_diesel_price_EnF_variable)):
t_diesel_price_EnF_values[EnF]=t_diesel_price_EnF_variable[EnF].get()
try:
t_diesel_price_EnF_values[EnF] = float(t_diesel_price_EnF_values[EnF])
except ValueError:
pass
print(t_diesel_price_EnF_values)
for EnF in range(0,len(t_diesel_price_EnF_values)):
t_diesel_price_EnF_variable[EnF] = StringVar(root , value = "N/A")
t_diesel_price = Entry(root , textvariable = t_diesel_price_EnF_variable[EnF], width = 10).pack()
t_diesel_price_EnF_variable[EnF].trace("w",EnFChanging)
def ChangeText():
for EnF in range(0, len(t_diesel_price_EnF_values)):
t_diesel_price[EnF].delete(0,END)
t_diesel_price[EnF].insert(0,"N/A")
return
b1 = Button(root, text = "Reset" , command = ChangeText).pack()
root.mainloop()
When I press the button it gives an error t_diesel_price[EnF].delete(0,END)
TypeError: 'NoneType' object is not subscriptable
What should I do now, Please ignore the basic errors of programming as I am a Mechanical Engineer with not a programming back ground. And I have to make a lot of other boxes too for my energy calculator.
You trying treat t_diesel_price as an Entry (and as a list) when your variable is None.
First of all I suggest you to install some IDE (e.g. PyCharm) and place break points to see whats wrong with variable!
Your problem occures because you create and pack your widget in one line! So t_diesel_price is None because pack() always returns None (link).
Just split your declaration and packing to:
t_diesel_price = Entry(root , textvariable = t_diesel_price_EnF_variable[EnF], width = 10)
t_diesel_price.pack()
After that it's works for me, except this fact that t_diesel_price is last created entry and the value changes only in it. So I assume that you need another list to iterate over entries:
...
# another fresh list
t_diesel_price_EnF_entries = list()
...
# declare entry
t_diesel_price = Entry(root, textvariable=t_diesel_price_EnF_variable[EnF], width=10)
# pack entry
t_diesel_price.pack()
# append entry to list
t_diesel_price_EnF_entries.append(t_diesel_price)
...
def ChangeText():
# iterate over entries
for diesel_price in t_diesel_price_EnF_entries:
diesel_price.delete(0,END)
diesel_price.insert(0,"N/A")
...
Alternatively you can iterate over StringVar's if you don't wanna store your entries at all:
def ChangeText():
# iterate over stringvars
for EnF in range(len(t_diesel_price_EnF_variable)):
t_diesel_price_EnF_variable[EnF].set('N/A')
And you can make it more readable as in example with entry iterating:
def ChangeText():
# iterate over stringvars
for string_var in t_diesel_price_EnF_variable:
string_var.set('N/A')
Cheers!
I have a problem with the following code. Now I'm very new to programming in general, and most of the code is copied off the internet, and I adjusted it so it would work the way I want it to. So if there is no easy way of solving it, that's ok. Maybe you can just point out some topics of programming or python, that I should read about.
I try to explain it anyways. I have defined the function query(), that makes some changes to sqlite databases. The input is a list. That function works just fine if I use it just by itself.
Now I'm trying to have an Interface, where I can define, what should be inside that list, depending on what checkboxes are checked. Then I want to execute the function with that specific list, when I press a button. The checkboxes are generated just fine, the button, too. Also, when I check or uncheck the buttons, it updates the list just fine, and it shows the new updated list in the interpreter.
The problem is, that the button does not work:
1. It doesn't use the new updated list, instead it uses an empty list ()
2. When I input a predefined list, that is not empty, it automatically runs query() without me even clicking the button.
I may not have explained this well, but I hope you understand what my problem is.
Thanks for the help
`
def chkbox_checked():
for ix, item in enumerate(cb):
opt[ix]=(cb_v[ix].get())
print opt
def query(opt):
import sqlite3
connection = sqlite3.connect("gather.sqlite")
cursor1 = connection.cursor()
cursor1.execute('Drop table IF EXISTS matches')
cursor1.execute('CREATE TABLE matches(date TEXT, team1 TEXT, team2 TEXT, league TEXT)')
cursor1.execute('DELETE FROM "main"."matches"')
for i in range(0, len(opt)):
a=opt[i]
cursor1.execute('INSERT INTO matches (date, team1, team2, league) SELECT * FROM gather WHERE team1=? or team2=? or league=?', (a,a,a,))
cursor1.execute('Drop table IF EXISTS matchessorted')
cursor1.execute('CREATE TABLE matchessorted(date TEXT, team1 TEXT, team2 TEXT, league TEXT)')
cursor1.execute('DELETE FROM "main"."matchessorted"')
cursor1.execute('INSERT INTO matchessorted (date, team1, team2, league) SELECT * FROM matches ORDER BY date')
connection.commit()
import Tkinter as tk
from Tkinter import *
opt = []
root = tk.Tk()
mylist = [
'name1',
'name2',
'name3'
]
cb = []
cb_v = []
for ix, text in enumerate(mylist):
cb_v.append(tk.StringVar())
off_value=0
cb.append(tk.Checkbutton(root, text=text, onvalue=text,offvalue=off_value,
variable=cb_v[ix],
command=chkbox_checked))
cb[ix].grid(row=ix, column=0, sticky='w')
opt.append(off_value)
cb[-1].deselect()
label = tk.Label(root, width=20)
label.grid(row=ix+1, column=0, sticky='w')
button1 = Button(root, text = "Calculate", command = query(opt))
button1.grid(column=1, row=0, sticky=W)
root.mainloop()
`
A couple of points about how to structure your code: You need to write a function that populates the list based on your selection. It can return a list call 'options' and when you want to execute the code inside the query, you call the function that constructs the options list. The query function will have a statement like this:
options = get_options() #assuming the function that populates the options is called get_options
and then you execute the query function's code.
button1 = Button(root, text = "Calculate", command = query(opt))
This calls query(opt) immediately, before you create your Button, and passes the result of that call (None) to the Button constructor as the command argument. What you really want is a function that, when called, executes query(opt). Something like this:
def calculate_clicked():
query(opt)
button1 = Button(root, text = "Calculate", command = calculate_clicked)
or this:
button1 = Button(root, text = "Calculate", command = lambda : query(opt))
I have created a panedwindow in python tkinter with two panes. It will open fine on it's own but within an if statement it no longer opens
First I had just the code for the panedwindow on it's own but I wanted to use it within another section of code. It won't work within an if statement, it appears to be ignored. Where have I gone wrong?
from tkinter import *
import time
ticketCost=6
username="Rob"
code = input("Enter code: ")
if code == "123":
year=str(time.localtime()[0])
month=str(time.localtime()[1])
day=str(time.localtime()[2])
hour=str(time.localtime()[3])
minute=str(time.localtime()[4])
ticketTime=str(hour+":"+minute)
ticketDate=str(day+"/"+month+"/"+year)
ticketInfo="Bus ticket\nSingle\nDate: "+ticketDate+"\nTime: "+ticketTime+"\nPassengers: "+
...str(int(ticketCost/3))+"\nPrice: "+str(ticketCost)+" credits"
ticketWindow = PanedWindow(orient=VERTICAL,bg="white")
ticketWindow.pack(fill=BOTH, expand=1)
top = Label(ticketWindow, text="top pane")
photo = PhotoImage(file='Coach 1.gif')
top.config(image=photo,bg="white")
top.image = photo
ticketWindow.add(top)
bottom = Label(ticketWindow, text="bottom pane")
bottom.config(text=ticketInfo)
bottom.config(bg="white")
ticketWindow.add(bottom)
print("\nThank you", username)
else:
print("no")
You do not appear to be making a root window, and are not starting the event loop.
I am trying a piece of python based tkinter code with following objective:
(Please go through the objective, then I will take an example to explain what exactly i require and then in the end will post the script I have written)
Reads from a config file, which is implemented using configparser module.
Based on options read from this file it automatically generates widget.
These widgets are restricted to only labels and entry box as of now.
Every entry box is associated with a variable. It is hence needed to generate a variable
automatically whenever a entry box is declared.
Now when the user enters any value in the entry box, and presses calculate button a list is
generated with combination of values entered by user( in a specific format).
Example:
Let the configparser file has following content:
[widget]
label = ani_label,sham_label
entry = ani,sham
The list generated for this case will be like this:
out_list = ['-ani','< ani >','-sham','< sham >']
< ani > means value stored in ani variable
And below is the code that i have tried.
from Tkinter import *
from Tkinter import Tk
import Tkinter as tk
import ttk
import ConfigParser
import sys
############ Initialize ###############################
parser_read = ConfigParser.ConfigParser()
parser_read.read('option_read.config')
config_list = {}
config_list['label'] = parser_read.get('widget','label').split(',')
config_list['entry'] = parser_read.get('widget','entry').split(',')
######
def calculate():
#Will include the list generation part
pass
#######
root = Tk()
root.title("NRUNTEST GUI VERSION 1")
#
menuframe = ttk.Frame(root)
menuframe.grid(column=0,row=0)
menuframe.columnconfigure(0,weight=1)
menuframe.rowconfigure(0,weight=1)
#
mainframe_label = ttk.Frame(root)
mainframe_label.grid(column=1,row=0)
mainframe_label.columnconfigure(0,weight=1)
mainframe_label.rowconfigure(0,weight=1)
#
mainframe_entry = ttk.Frame(root)
mainframe_entry.grid(column=2,row=0)
mainframe_entry.columnconfigure(0,weight=1)
mainframe_entry.rowconfigure(0,weight=1)
#
general_label= Label(menuframe,text="Please Enter the Values Below").grid(column=1,row=0,sticky=(E))
compiler_label= ttk.Label(menuframe,text="Compiler")
compiler_label.grid(column=1,row=1,sticky=W)
#
calculate_button = ttk.Button(menuframe, text="Calculate", command=calculate).grid(column=1,row=2,sticky=(W,E))
#Automatic Widget declaration ###
for x in config_list['label']:
x = ttk.Label(mainframe_label,text=x).grid()
for x in config_list['entry']:
#print x
var = lambda: sys.stdout.write(x)
x = ttk.Entry(mainframe_entry,textvariable = x).grid()
root.mainloop()
The content of option_read.config is
[widget]
label : animesh_label,sharma
entry : animesh_entry,sharma
STATUS:
I can create the required widgets automatically. But I am not able to create the variables dynamically to store the entry box values.
Once the variable has been calculated, I can write the calculate function on my own.
Please advice how i can proceed.
If you have any better way to meet my requirements, please do suggest.
Also do ping me if you require any more inputs or my query is not clear.
The easiest way to do this, IMO, is to use a dict to store the references to the dynamically created variables. You could use the label as the key. For example:
vars = {}
for x in config_list['entry']:
vars[x] = StringVar()
entry = ttk.Entry(mainframe_entry, textvariable=vars[x])
entry.grid()
By the way... are you aware that if you do something like x=ttk.Entry(...).grid(...), x does not contain a reference to the widget? It contains the result of the call to grid, which is None.