title: Python 3 /Tkinter: changing the font type, size, and color of a pre-defined label
body: <p>I'm using Tkinter with Python 3.6 (Windows 10).  I have a frame on a canvas, and the frame contains a label.  The label properties (i.e., font type, color, size) are to be selected by the user from drop-down menus during use of the GUI.  The initiation of the frame and its label are:</p>
  
  <pre><code>    self.defaultLeftStringValue                     = StringVar()       
      self.defaultRightStringValue                    = StringVar()
      self.leftFrame                                  = tf.TextInFrame(self.main_container, bg = 'white', 
                                                                       height = 128, width = 128)
      self.leftFrame.place( x = 10, y = 10)
      self.leftFrame.pack_propagate(False)
      self.leftLabel                                  = Label(self.leftFrame, textvariable=self.defaultLeftStringValue).pack()
  </code></pre>
  
  <p>Later, the user has selected the font type, size, and color with another method (doEnter:)</p>
  
  <pre><code>def doEnter(self):
  
      thisFontSize                                    = self.tkvarFontSize.get()
      thisFontColor                                   = self.tkvarFontFgColor.get()
      thisFontType                                    = self.tkvarFontType.get()
      self.leftFrame.config(bg=self.tkvarFontBgColor.get())
      self.rightFrame.config(bg=self.tkvarFontBgColor.get())
      font                                            = Font( family = thisFontType, size = thisFontSize )
      splitText                                       = self.text_entry.get()
  
      self.splitTextLeft                              = " "
      self.splitTextRight                             = " "
      if ";" in splitText:
          splitText                                   = splitText.split(";")
          self.splitTextLeft                          = splitText[0]
          self.splitTextRight                         = splitText[1]
          splitTextLeftLength                         = font.measure(self.splitTextLeft)
          splitTextRightLength                        = font.measure(self.splitTextRight)
          splitTextHeight                             = font.metrics("linespace")
          self.defaultLeftStringValue.set(self.splitTextLeft)
          self.defaultRightStringValue.set(self.splitTextRight)
  </code></pre>
  
  <p>All this works great; the entered text appears in the label of the left and right frames.  I'm even able to change the background color of the frame.  But, I cannot figure out how to change the label properties with thisFontSize (value = 10, type = class int), and thisFontColor (black, class str) and thisFontType (agencyfb, class str).  Hoping that someone can tell me how to change the properties of the text inserted into self.splitTextLeft, etc.</p>