def load_installed_version(self):
        installed_packages = get_installed_pypackages()
        if self.package in installed_packages:
            self.version = "=={}".format(
                installed_packages[self.package].version)
def flush(self):
        if self._bufferedCommands is None:
            return
        self._connection.sendline(str(self._bufferedCommands))
        self._bufferedCommands = None