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Solve the following problem using Python, implementing the functions described below, one line at a time
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Description:
 def rename(self):
 """ Renames the selected item in the tree view """

        src = self.get_current_path()
        pardir, name = os.path.split(src)
        new_name, status = QtWidgets.QInputDialog.getText(
            self.tree_view, _('Rename '), _('New name:'),
            QtWidgets.QLineEdit.Normal, name)
        if status:
            dest = os.path.join(pardir, new_name)
            old_files = []
            if os.path.isdir(src):
                old_files = self._get_files(src)
            else:
                old_files = [src]
            try:
                os.rename(src, dest)
            except OSError as e:
                QtWidgets.QMessageBox.warning(
                    self.tree_view, _('Rename failed'),
                    _('Failed to rename "%s" into "%s".\n\n%s') % (src, dest, str(e)))
            else:
                if os.path.isdir(dest):
                    new_files = self._get_files(dest)
                else:
                    new_files = [dest]
                self.tree_view.file_renamed.emit(os.path.normpath(src),
                                                 os.path.normpath(dest))
                renamed_files = []
                for old_f, new_f in zip(old_files, new_files):
                    self.tree_view.file_renamed.emit(old_f, new_f)
                    renamed_files.append((old_f, new_f))
                # emit all changes in one go
                self.tree_view.files_renamed.emit(renamed_files)