小编Lik*_*ple的帖子

我正在尝试安装 pyautogui，但 pip 不断抛出错误。如何修复它？我尝试安装 libffi 库。这是一些代码：

python3 -m pip install pyautogui
Defaulting to user installation because normal site-packages is not writeable
Collecting pyautogui
  Using cached PyAutoGUI-0.9.50.tar.gz (57 kB)
    ERROR: Command errored out with exit status 1:
     command: /usr/local/bin/python3 -c 'import sys, setuptools, tokenize; sys.argv[0] = '"'"'/tmp/pip-install-sxm4ewnq/pyautogui/setup.py'"'"'; __file__='"'"'/tmp/pip-install-sxm4ewnq/pyautogui/setup.py'"'"';f=getattr(tokenize, '"'"'open'"'"', open)(__file__);code=f.read().replace('"'"'\r\n'"'"', '"'"'\n'"'"');f.close();exec(compile(code, __file__, '"'"'exec'"'"'))' egg_info --egg-base /tmp/pip-pip-egg-info-85ugzov6
         cwd: /tmp/pip-install-sxm4ewnq/pyautogui/
    Complete output (11 lines):
    Traceback (most recent call last):
      File "<string>", line 1, in <module>
      File "/usr/local/lib/python3.8/site-packages/setuptools/__init__.py", line 19, in <module>
        from setuptools.dist …

当我尝试使用 Python 3.10 安装 numpy 时，我收到此消息。

如何解决这个问题？

  Copying numpy.egg-info to build/bdist.linux-x86_64/wheel/numpy-1.19.3-py3.10.egg-info
  running install_scripts
  Traceback (most recent call last):
    File "/home/walenty/.local/lib/python3.10/site-packages/pip/_vendor/pep517/_in_process.py", line 280, in <module>
      main()
    File "/home/walenty/.local/lib/python3.10/site-packages/pip/_vendor/pep517/_in_process.py", line 263, in main
      json_out['return_val'] = hook(**hook_input['kwargs'])
    File "/home/walenty/.local/lib/python3.10/site-packages/pip/_vendor/pep517/_in_process.py", line 204, in build_wheel
      return _build_backend().build_wheel(wheel_directory, config_settings,
    File "/tmp/pip-build-env-plb3t7s6/overlay/lib/python3.10/site-packages/setuptools/build_meta.py", line 211, in build_wheel
      return self._build_with_temp_dir(['bdist_wheel'], '.whl',
    File "/tmp/pip-build-env-plb3t7s6/overlay/lib/python3.10/site-packages/setuptools/build_meta.py", line 197, in _build_with_temp_dir
      self.run_setup()
    File "/tmp/pip-build-env-plb3t7s6/overlay/lib/python3.10/site-packages/setuptools/build_meta.py", line 248, in run_setup
      super(_BuildMetaLegacyBackend,
    File "/tmp/pip-build-env-plb3t7s6/overlay/lib/python3.10/site-packages/setuptools/build_meta.py", line 142, in run_setup
      exec(compile(code, __file__, 'exec'), locals())
    File "setup.py", line 508, …

我创建了一个 svelte 项目并想使用 prettier。我有更漂亮的精简插件。

pnpm exec prettier --write .

只会获取 js 和 html 文件。

pnpm exec prettier --write .src/routes/+page.svelte

或者

pnpm exec prettier --write . **.svelte 

将正常工作并拾取所有文件。

难道不是预期的行为或更漂亮地拾取纤细的文件吗？为什么它不接他们？

我正在创建一个应用程序，我需要在初始渲染时创建一个对象并在整个组件生命周期中保留它。

我的代码现在看起来像这样：

function Component() {\n  const obj = useRef(new Smth());\n  return (\n    <div>\n      <button onClick={obj.current.p}>p</button>\n      <button onClick={obj.current.c}>c</button>\n    </div>\n  );\n};\n

React 文档说：

\n

useRef 返回一个可变的 ref 对象，其 .current 属性被初始化为传递的参数 (initialValue)。返回的对象将在组件的整个生命周期内持续存在。

\n

来自： https: //reactjs.org/docs/hooks-reference.html#useref

看来我使用得当。然而，Hooks FAQ 说：

\n

您有时可能还想避免重新创建 useRef() 初始值。例如，也许您想确保某些命令式类实例仅创建一次：

\n

function Image(props) {\n  // \xe2\x9a\xa0\xef\xb8\x8f IntersectionObserver is created on every render\n  const ref = useRef(new IntersectionObserver(onIntersect));\n  // ...\n}\n\n

\n

useRef 不接受像 useState 这样的特殊函数重载。相反，您可以编写自己的函数来延迟创建和设置它：

\n

\nfunction Image(props) {\n  const ref …