Deleting text from an edit control in Python 2.7?
Question: How can I program the example below to delete all contents from the Edit box?
(this is example is taken from <http://www.java2s.com/Code/Python/GUI-
Tk/SimpleEditor.htm>)

My guess is that one must select all the contents and then do some sort of
`.tag_remove(SEL, '1.0', END)` but I can't find the commands to program it to
select all the text.

    
    
    from Tkinter import * 
    from tkSimpleDialog import askstring
    from tkFileDialog   import asksaveasfilename
    
    from tkMessageBox import askokcancel          
    
    class Quitter(Frame):                        
        def __init__(self, parent=None):          
            Frame.__init__(self, parent)
            self.pack()
            widget = Button(self, text='Quit', command=self.quit)
            widget.pack(expand=YES, fill=BOTH, side=LEFT)
        def quit(self):
            ans = askokcancel('Verify exit', "Really quit?")
            if ans: Frame.quit(self)
    
    
    class ScrolledText(Frame):
        def __init__(self, parent=None, text='', file=None):
            Frame.__init__(self, parent)
            self.pack(expand=YES, fill=BOTH)               
            self.makewidgets()
            self.settext(text, file)
        def makewidgets(self):
            sbar = Scrollbar(self)
            text = Text(self, relief=SUNKEN)
            sbar.config(command=text.yview)                  
            text.config(yscrollcommand=sbar.set)           
            sbar.pack(side=RIGHT, fill=Y)                   
            text.pack(side=LEFT, expand=YES, fill=BOTH)     
            self.text = text
        def settext(self, text='', file=None):
            if file: 
                text = open(file, 'r').read()
            self.text.delete('1.0', END)                   
            self.text.insert('1.0', text)                  
            self.text.mark_set(INSERT, '1.0')              
            self.text.focus()                                
        def gettext(self):                               
            return self.text.get('1.0', END+'-1c')         
    
    
    
    class SimpleEditor(ScrolledText):                        
        def __init__(self, parent=None, file=None): 
            frm = Frame(parent)
            frm.pack(fill=X)
            Button(frm, text='Save',  command=self.onSave).pack(side=LEFT)
            Button(frm, text='Cut',   command=self.onCut).pack(side=LEFT)
            Button(frm, text='Paste', command=self.onPaste).pack(side=LEFT)
            Button(frm, text='Find',  command=self.onFind).pack(side=LEFT)
            Quitter(frm).pack(side=LEFT)
            ScrolledText.__init__(self, parent, file=file) 
            self.text.config(font=('courier', 9, 'normal'))
        def onSave(self):
            filename = asksaveasfilename()
            if filename:
                alltext = self.gettext()                      
                open(filename, 'w').write(alltext)          
        def onCut(self):
            text = self.text.get(SEL_FIRST, SEL_LAST)        
            self.text.delete(SEL_FIRST, SEL_LAST)           
            self.clipboard_clear()              
            self.clipboard_append(text)
        def onPaste(self):                                    
            try:
                text = self.selection_get(selection='CLIPBOARD')
                self.text.insert(INSERT, text)
            except TclError:
                pass                                      
        def onFind(self):
            target = askstring('SimpleEditor', 'Search String?')
            if target:
                where = self.text.search(target, INSERT, END)  
                if where:                                    
                    print where
                    pastit = where + ('+%dc' % len(target))   
                   #self.text.tag_remove(SEL, '1.0', END)     
                    self.text.tag_add(SEL, where, pastit)     
                    self.text.mark_set(INSERT, pastit)         
                    self.text.see(INSERT)                    
                    self.text.focus()                        
    
    if __name__ == '__main__':
        try:
            SimpleEditor(file=sys.argv[1]).mainloop()   
        except IndexError:
            SimpleEditor().mainloop()            
    


Answer: The text widget has a `delete` method, which you can use to delete characters.
You don't need to select the characters first.

If you want to delete all of the text, just do:

    
    
    self.text.delete("1.0", "end")
    

(you can also use a tkinter constant instead of the string `"end"`, but I
don't see the point)

