python - Change OptionMenu based on what is selected in another OptionMenu -

-

I am currently trying to create two OptionMenu s, where the other is dynamically For example, I would like to create a OptionMenu_A with list 

   
  [North America, Europe, Asia]   
     
  •  If  Asia  is selected, then  OptionMenu_B  something like  [Japan, China, Malasia] .  
  •  If  Europe  is selected, then it will convert to  [Germany, France, Switzerland]  for example.   
     I am able to create two  OptionMenu  s but can not get the  OptionMenu_B  to update based on  OptionMenu_A  status  
     Can anyone be very kind to show that such a thing is possible?   
     
     
     Yes, this is possible. With  StringVar.trace , you can check when the first option has been changed. Then remove all options in the second option menu and fill it with this option. If you have a data structure like a dictionary behind this, then this pattern can be very easy to map:  
      import sys if sys.version_info [0]> = 3: import as tkkner Import TK class app (tk.Frame) as someone else Tkinter: def __init __ (self, master): tk.frame .__ init __ (self, master) self.dict = {' Asia ': [' Japan ',' China ',' Malaysia '],' Europe ': [' Germany ',' France ',' Switzerland ']} self.variable_a = tk.StringVar (self) self.variable_b = tk .StringVar (self) self.variable_a.trace ('w', self.update_options) self.opt Ionmenu_a = tk.OptionMenu (self, self.variable_a, * self.dict.keys ()) self.optionmenu_b = tk.OptionMenu (self, self.variable_b, '') self.variable_a .Set ('Asia') self. Optionmenu_a.pack () self.optionmenu_b.pack () self.pack () def update_options (self, * args): countries = self.dict [self.variable_a.get ()] self .variable_b.set (countries [0] ) Menu = self.optionmenu_b ['menu'] menu.delete (0, 'end') for countries in the country: menu.add_command (label = country, command = lambda nation = country: self.variable_b.set (nation) ) If __name__ == "__main__": root = tk.Tk () application = application (root) app.mainloop ()

Comments

Post a Comment

Popular posts from this blog

java - ImportError: No module named py4j.java_gateway -

-
I'm trying to call the Python using the Java program py4j . I've been installing the plug-in Eclipse and test name Piidvi project. I'm trying to execute the following part of the code found on py4j webpage: Import from py4j.java_gateway to JavaGateway, java_import gateway = JavaGateway () jvm = gateway.jvm java_import (jvm, '' Org.eclipse Kkorkrisorsej. * ") Vrkspes_rut = Jvankresourkesplginkgetvrkspas (). GetRoot (Gateway .help (workspace_root, '* Projects *') project_names = [project.getName () (for projects workpace_root.getProjects))] print (Projekt_nam) But I There is an error in import. I have checked that the P4JJ is present in the Jar Eclipse plugin directory. Can anyone help please? I had to install the py4j application
Read more

python - Receiving "KeyError" after decoding json result from url -

-
I am new to Python I am trying to parse JSON result from a URL. Basically, I was using the following: response = urllib.request.urlopen (url) json_obj = json.load (response) It should be a stroke "str 'not' bytes' in the lines of a given" JSON object, so after searching on the StackoverView Flo, I decode the response in this way: F = urllib.request.urlopen (Url) charset = f.info (). Get_param ('charset', 'utf8') data = f.read () decoded = json.loads (data.decode (charset)) If I print "decode" I is as follows: { 'link': { 'summary data': 'https: // localhost / piwebapi / streams / p0_7qHaW4UHU-RlCaz8tpasAAQAAAAU0hJTExNQU42NDIwXFNJTlVTT0lE / summary' 'value': 'https: // localhost / Piwebapi / streams / P0_7qHaW4UHU-RlCaz8tpasAAQAAAAU0hJTExNQU42NDIwXFNJTlVTT0lE / price ',' InterpolatedData ':' https: // localhost / Piwebapi / streams / P0_7qHaW4UHU-RlCaz8tpasAAQAAAAU0hJTE...
Read more

.net - Creating a new Queue Manager and Queue in Websphere MQ (using C#) -

-
"itemprop =" text "> I am writing applications that use WebSphere MQ to send messages. My unittests (for flow), I want to verify that I have put the correct message on the response queue. I am trying to figure out how to do this. My main obstacle is that I think it might be scary to clear the queue before running in my queue because the same queue can be used by other applications, I thought a decent solution would be a new line The manager will remove the queue for my solidarity and after using it. So my question is: Is it possible to use C # by using queue manager and queue? After the For future reference and future people, who want to make queues. I thought how to make and remove IBM MQ QE (not quenhers) with PCM messaging. It is not very simple, but it can be done. We have implemented it in a library and it is being used to create and delete commands before and after integration tests. The most important part of the code in this library is shown in the...
Read more