python 编辑框 text

def makewidgets(self):
    sbar = Scrollbar(self)
    text = Text(self, relief=SUNKEN)
    sbar.config(command=text.yview)                  # xlink sbar and text
    text.config(yscrollcommand=sbar.set)             # move one moves other
    sbar.pack(side=RIGHT, fill=Y)                    # pack first=clip last
    text.pack(side=LEFT, expand=YES, fill=BOTH)      # text clipped first
    self.text = text

def settext(self, text='', file=None):
    if file:
        text = open(file, 'r').read()
    self.text.delete('1.0', END)                     # delete current text
    self.text.insert('1.0', text)                    # add at line 1, col 0
    self.text.mark_set(INSERT, '1.0')                # set insert cursor
    self.text.focus()                                # save user a click

def gettext(self):                                   # returns a string
    return self.text.get('1.0', END+'-1c')           # first through last