title: python entry widget tuple combo
body: <p>I've been playing with combining entry widgets with tuples in python 2.7 tkinter.  With this code, I should be able to enter the name of a fruit, search for it in the fruit bowl tuple, and if it's in there, display the characteristics of that fruit using a set of radiobuttons.  </p>
  
  <pre><code>from Tkinter import*
  
  class Fruit:
      def __init__(self, parent):
  
          # variables
          self.texture_option = StringVar()
          self.climate_option = StringVar()
  
          # layout
          self.myParent = parent
  
          self.main_frame = Frame(parent, background="light blue")
          self.main_frame.pack(expand=YES, fill=BOTH)
  
          texture_options = ["Soft", "Crunchy","?"]
          climate_options = ["Temperate", "Tropical","?"]
  
          self.texture_option.set("?")
          self.climate_option.set("?")
  
          self.texture_options_frame = Frame(self.main_frame, borderwidth=3, background="light blue")
          self.texture_options_frame.pack(side=TOP, expand=YES, anchor=W)
          Label(self.texture_options_frame, text="Texture:", relief=FLAT, font="bold", background="light blue").pack(side=LEFT,anchor=W)
          for option in texture_options:
              button = Radiobutton(self.texture_options_frame, text=str(option), indicatoron=0,
              value=option, padx=5, variable=self.texture_option, background="light blue")
              button.pack(side=LEFT)
  
          self.climate_options_frame = Frame(self.main_frame, borderwidth=3, background="light blue")
          self.climate_options_frame.pack(side=TOP, expand=YES, anchor=W)
          Label(self.climate_options_frame, text="Climate:", relief=FLAT, font="bold", background="light blue").pack(side=LEFT,anchor=W)
          for option in climate_options:
              button = Radiobutton(self.climate_options_frame, text=str(option), indicatoron=0,
              value=option, padx=5, variable=self.climate_option, background="light blue")
              button.pack(side=LEFT)
  
          #search button
          self.search_frame = Frame(self.main_frame, borderwidth=5, height=50, background="light blue")
          self.search_frame.pack(expand=NO)
  
          enter = Entry(self.search_frame, width=30).pack(side=LEFT, expand=NO, padx=5, pady=5, ipadx=5, ipady=5)
  
          self.searchbutton = Button(self.search_frame, text="Search", foreground="white", background="blue",
          width=6, padx="2m", pady="1m")
          self.searchbutton.pack(side=LEFT, pady=5)
          self.searchbutton.bind("&lt;Button-1&gt;", self.searchbuttonclick)
          self.searchbutton.bind("&lt;Return&gt;", self.searchbuttonclick)
  
  
      def searchbuttonclick(self,event):
          #fruit  texture  climate 
          fruit_bowl=[
          ('Apple', 'Crunchy','Temperate'),
          ('Orange', 'Soft','Tropical'),
          ('Pawpaw','Soft','Temperate')]
  
          if enter.get()==fruit_bowl[x][0]:
              self.texture_option.set()==fruit_bowl[x][1]
              self.climate_option.set()==fruit_bowl[x][2]
  
  root = Tk()
  root.title("Fruit Bowl")
  fruit = Fruit(root)
  root.mainloop()
  </code></pre>
  
  <p>I am getting an error message, Name Error: global name 'enter' is not defined.
  Does anyone know why this refuses to work?</p>