如何在python中获取/设置逻辑目录路径

import os

def get_logical_path(path):
    logical_path = os.path.dirname(os.path.basename(path))
    return logical_path

def set_logical_path(path, logical_path):
    os.path.basename(path) = logical_path

import os

def get_logical_path(path):
    logical_path = ""
    for root, dirs, files in os.walk(path):
        for file_name in files:
            logical_path = os.path.join(root, file_name)
            break
    return logical_path

def set_logical_path(path, logical_path):
    os.path.join(path, logical_path) = os.path.dirname(logical_path)

import os

class FolderPathLexer:
    def __init__(self, path):
        self.path = path
        self.tokens = []
        self.pos = 0

    def advance(self):
        if self.pos >= len(self.path):
            self.tokens.append(None)
            return

        if self.path[self.pos] == '/':
            if self.path.endswith('/'):
                self.tokens.append('/')
            else:
                self.tokens.append('')
            self.pos += 1
        else:
            if self.path.endswith('/'):
                self.pos += 1
            else:
                self.pos += 1

    def match(self):
        current_token, self.pos = self.path[self.pos], self.pos + 1
        if current_token is None:
            self.tokens.append(None)
            return
        self.tokens.append(current_token)
        if current_token in ['.', './']:
            if self.path.endswith('/..'):
                self.tokens.append('')
            else:
                self.pos = current_token + 1
        elif current_token == []:
            pass
        elif current_token == ['..']:
            self.pos = current_token + 1
        elif current_token in ['/', '\']):
            if self.path.endswith('/'):
                self.tokens.append('')
            else:
                self.tokens.append('')
                self.pos += 1
        elif current_token in ['/', '/..']:
            if self.path.endswith('/.'):
                self.tokens.append('')
            else:
                self.pos += 1
        else:
            raise ValueError("Invalid FolderPathLexer token: ".format(current_token))

def get_logical_path(path):
    logical_path = ""
    lexer = FolderPathLexer(path)
    while lexer.pos < len(path):
        lexer.advance()
        if isinstance(lexer.tokens[-1], str):
            logical_path += lexer.tokens[-1]
        else:
            raise ValueError("Invalid FolderPathLexer token: ".format(lexer.tokens[-1]))