<SYSTEM_TASK:>
Solve the following problem using Python, implementing the functions described below, one line at a time
<END_TASK>
<USER_TASK:>
Description:
 def edit(self, path, value):
 """ Edit a key value :param path: The path key for the value :type path: :py:obj:`str` :param value: The value to be set :type value: :py:obj:`str` """

    _dict = PyVDF.__UseDict
    p = [re.sub('[\[\]]', '', w) for w in PyVDF.__RE_Path_Seperator.findall(path)]
    array = self.getData()
    a = array
    for c in p[:-1]:
      try:
        if not isinstance(a[c], dict):
          a[c] = _dict()
      except KeyError:
        a[c] = _dict()
      a = a[c]
    if value == None:
      a.pop(p[-1], None)
    else:
      a[p[-1]] = value
    self.__data = array