Update label based on Key in Dropdown menu Tkinter Python -

-

hi trying update label based on key selected drop down menu (using dictionary). unsure how can update label. thankyou. have made attempt below doing wrong due lack of knowledge. thankyou 

from tkinter import * tkinter.ttk import * import csv   class dictionarygui: '''display gui allowing key->value lookup''' def __init__(self, parent, row, column, dictionary):     self.dictionary = dictionary     self.selection = stringvar()     self.value = stringvar()      username_label = label(parent, text="key:")     username_label.grid(row=row, column=column)     keys = list(sorted(dictionary.keys()))     self.selection.set(keys[0])     select = combobox(parent, textvariable=self.selection,                       values=keys,                       width=8, command=self.update())     select.grid(row=row, column=column+1)         name = label(parent, textvariable=self.value)     name.grid(row=row, column=column+3)  def update(self):     self.value.set(self.dictionary[self.selection.get()])      def main():   window = tk()   test_dict = {'first_name': 'fred', 'last_name': 'bloggs', 'age' : 20}   gui = dictionarygui(window, 0, 0, test_dict)   window.mainloop()  main()

try this: 

from tkinter import * ttk import * import csv   class dictionarygui: '''display gui allowing key->value lookup''' def __init__(self, parent, row, column, dictionary):     self.dictionary = dictionary     self.selection = stringvar()     self.value = stringvar()      username_label = label(parent, text="key:")     username_label.grid(row=row, column=column)     keys = list(sorted(dictionary.keys()))     self.selection.trace('w', self.update)  ## added line     self.selection.set(keys[0])     select = combobox(parent, textvariable=self.selection,                       values=keys,                       width=8)     select.grid(row=row, column=column+1)      name = label(parent, textvariable=self.value)     name.grid(row=row, column=column+3)  def update(self, *a):     self.value.set(self.dictionary[self.selection.get()])  def main():   window = tk()   test_dict = {'first_name': 'fred', 'last_name': 'bloggs', 'age' : 20}   gui = dictionarygui(window, 0, 0, test_dict)   window.mainloop()  main()

what did attach trace() method stringvar , removed command parameter passing.


Comments

Post a Comment

Popular posts from this blog

wordpress - (T_ENDFOREACH) php error -

-
creating wordpress website , i'm getting following php error: parse error: syntax error, unexpected 'endforeach' (t_endforeach) in /home/soralmedia/public_html/wp-content/themes/soral media/woocommerce/myaccount/my-orders.php on line 98 here's code file: <?php /** * orders * * shows recent orders on account page. * * template can overridden copying yourtheme/woocommerce/myaccount/my-orders.php. * * however, on occasion woocommerce need update template files , (the theme developer). * need copy new files theme maintain compatibility. try this. * little possible, happen. when occurs version of template file will. * bumped , readme list important changes. * * @see http://docs.woothemes.com/document/template-structure/ * @author woothemes * @package woocommerce/templates * @version 2.5.0 */ if ( ! defined( 'abspath' ) ) { exit; } $my_orders_columns = apply_filters( 'woocommerce_my_account_my_orders_columns', array( ...
Read more

Export Excel workseet into txt file using vba - (text and numbers with formulas) -

-
i new vba have developed code use in excel move text/numbers txt file. issue have 3 functions need go same txt file. when run first function has set fs = createobject("scripting.filesystemobject") set = fs.createtextfile(module1.nys45uploadfilename, true) a.writeline (str) a.close. the other 2 functions had save. set fs = createobject("scripting.filesystemobject") set = fs.savetextfile(module1.nys45uploadfilename, true) a.writeline (str) a.close. the first function go txt file, other 2 error object doesn't support property or method. when changed 3 create last function goes txt file. can not figure out word use in order make other 2 functions follow txt file in order keyed. the entire code follows private sub addrecord_click() on error goto errhandler module1.nys45uploadfilename = application.getsaveasfilename(filefilter:="textfiles (*.txt), *.txt") if module1.nys45uploadfilename = "false" exit sub ...
Read more

Using django-mptt to get only the categories that have items -

-
sample structure: all uppercase: category mixed case: item root ├── books │   ├── fiction │   │   └── classics │   └── non-fiction ├── clothing └── electronics ├── laptops ├── phones │   ├── apple │   │   ├── iphone 6 │   │   ├── iphone 6 plus │   │   ├── iphone 6s │   │   └── iphone 6s plus │   ├── motorola │   │   ├── moto g4 │   │   ├── moto g4 play │   │   ├── moto g4 plus │   │   └── moto x │   └── samsung └── tablets └── apple i'm trying have index page show "electronics" category. "clothing" category shouldn't show since it's empty , "books" category shouldn't show either since, although has child categories, child categories don't have items. similarly, "electronics" page should show "phones" category. "laptops" category shouldn't show since it's empty , "tablets" category shouldn't show either since...
Read more