Method insert

Lib/idlelib/pyshell.py:348–355

(self, index, chars, tags=None)

class ModifiedUndoDelegator(UndoDelegator):
    "Extend base class: forbid insert/delete before the I/O mark"
    def insert(self, index, chars, tags=None):
        try:
            if self.delegate.compare(index, "<", "iomark"):
                self.delegate.bell()
                return
        except TclError:
            pass
        UndoDelegator.insert(self, index, chars, tags)

    def delete(self, index1, index2=None):
        try: