python -m ensurepip --default-pip指令返回Ignoring indexes: https://pypi.python.org/simple Requirement already satisfied (use --upgrade to upgrade): setuptools in c:\python27\lib\site-packages Requirement already satisfied (use --upgrade to upgrade): pip in c:\python27\lib\site-packages C:\Users\LENOVO>python -m pip install --upgrade pip Collecting pip Using cached https://files.pythonhosted.org/packages/fa/ee/74ff76da0ab649eec7581233daeb43d8aa35383d8f75317b2ab3b80c922f/pip-23.1.2.tar.gz Complete output from command python setup.py egg_info: Traceback (most recent call last): File "<string>", line 1, in <module> File "c:\users\lenovo\appdata\local\temp\pip-build-7jcqba\pip\setup.py", line 7 def read(rel_path: str) -> str: ^ SyntaxError: invalid syntax ---------------------------------------- Command "python setup.py egg_info" failed with error code 1 in c:\users\lenovo\appdata\local\temp\pip-build-7jcqba\pip\ You are using pip version 8.1.1, however version 23.1.2 is available. You should consider upgrading via the 'python -m pip install --upgrade pip' command.

根据您提供的信息，似乎您正在尝试升级pip，并出现了一个SyntaxError。这个错误是由于Python 2.7不支持类型提示而引起的。为了解决这个问题，您可以考虑升级到Python 3.x版本，或者尝试使用旧版本的pip来升级pip，例如：

python -m pip install --upgrade pip==19.3.1

这将安装pip的旧版本（v19.3.1），并使用它来升级当前的pip。然后，您可以再次运行以下命令来升级pip：

python -m pip install --upgrade pip

这应该会升级pip到最新版本，而不会出现SyntaxError错误。