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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 expanduser(self, filepath, ssh=False):
 """Replaces the user root ~ with the full path on the file system. Works for local disks and remote servers. For remote servers, set ssh=True."""

        if ssh:
            self._check_ssh()
            stdin, stdout, stderr = self.ssh.exec_command("cd; pwd")
            stdin.close()
            remotepath = filepath.replace("~", stdout.read().split()[0])
            return self._get_tramp_path(remotepath)
        else:
            return os.path.expanduser(filepath)