装lxml这个库，装库不用我教了吧，直接pip或者pycharm装

但是装这个库我又出现了问题

Traceback (most recent call last):
  File "D:\Install\PyCharm 2020.1\plugins\python\helpers\packaging_tool.py", line 131, in main
    do_install(pkgs)
  File "D:\Install\PyCharm 2020.1\plugins\python\helpers\packaging_tool.py", line 59, in do_install
    run_pip(['install'] + pkgs)
  File "D:\Install\PyCharm 2020.1\plugins\python\helpers\packaging_tool.py", line 73, in run_pip
    runpy.run_module(module_name, run_name='__main__', alter_sys=True)
  File "D:\Install\Python 3.5\lib\runpy.py", line 182, in run_module
    return _run_module_code(code, init_globals, run_name, mod_spec)
  File "D:\Install\Python 3.5\lib\runpy.py", line 96, in _run_module_code
    mod_name, mod_spec, pkg_name, script_name)
  File "D:\Install\Python 3.5\lib\runpy.py", line 85, in _run_code
    exec(code, run_globals)
  File "D:\Install\Python 3.5\lib\site-packages\pip\__main__.py", line 29, in <module>
    from pip._internal.cli.main import main as _main
  File "D:\Install\Python 3.5\lib\site-packages\pip\_internal\cli\main.py", line 57
    sys.stderr.write(f"ERROR: {exc}")
                                   ^
SyntaxError: invalid syntax

说是电脑装了多个python版本造成的，我有3,5和3.8的，后来换成3.8的就没问题了，真是晕，你要么自己装个3.8的，要么尝试卸载其中一个版本，我已经弄好了，所以只是建议，行与不行不确定，慎重采用