Python-if

最新推荐文章于 2025-12-02 19:01:55 发布
转载 最新推荐文章于 2025-12-02 19:01:55 发布 · 100 阅读 · 0 ·
CC 4.0 BY-SA版权
原文链接：http://www.cnblogs.com/Mokaffe/p/4403350.html
文章标签：

#python

if 有单分支和双分支

语法结构

  • if condition:
    • statement
    • statement
    • etc.
  • else：
    • statement
    • statement
    • etc.

这个例子里面，判断为false的只有 ：False、0、null之类的（记不清了）

其他的字符串都可以当做True

 

嵌套的if-elif-else

 

 

条件判断-- 布尔表达式0--假

--非0即真！

 

条件判断表达式

  • 关系表达式： >=    、 <=   、 ==   、!=
  • 逻辑表达式：and  、  or 、 not 

 

转载于:https://www.cnblogs.com/Mokaffe/p/4403350.html

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find Python - version is "" │ gyp ERR! find Python - version is - should be >=3.6.0 │ gyp ERR! find Python - THIS VERSION OF PYTHON IS NOT SUPPORTED │ gyp ERR! find Python - "C:\Program Files (x86)\Python38-32\python.exe" could not be run │ gyp ERR! find Python │ gyp ERR! find Python ********************************************************** │ gyp ERR! find Python You need to install the latest version of Python. │ gyp ERR! find Python Node-gyp should be able to find and use Python. If not, │ gyp ERR! find Python you can try one of the following options: │ gyp ERR! find Python - Use the switch --python="C:\Path\To\python.exe" │ gyp ERR! find Python (accepted by both node-gyp and npm) │ gyp ERR! find Python - Set the environment variable PYTHON │ gyp ERR! find Python - Set the npm configuration variable python: │ gyp ERR! find Python npm config set python "C:\Path\To\python.exe" │ gyp ERR! find Python For more information consult the documentation at: │ gyp ERR! find Python https://github.com/nodejs/node-gyp#installation │ gyp ERR! find Python ********************************************************** │ gyp ERR! find Python │ gyp ERR! configure error │ gyp ERR! stack Error: Could not find any Python installation to use │ gyp ERR! stack at PythonFinder.fail (D:\projects\nvm\nvm\v22.10.0\node_modules\pnpm\dist\node_modules\node-gyp\lib\… │ gyp ERR! stack at PythonFinder.findPython (D:\projects\nvm\nvm\v22.10.0\node_modules\pnpm\dist\node_modules\node-gy… │ gyp ERR! stack at process.processTicksAndRejections (node:internal/process/task_queues:105:5) │ gyp ERR! stack at async configure (D:\projects\nvm\nvm\v22.10.0\node_modules\pnpm\dist\node_modules\node-gyp\lib\co… │ gyp ERR! stack at async run (D:\projects\nvm\nvm\v22.10.0\node_modules\pnpm\dist\node_modules\node-gyp\bin\node-gyp… │ gyp ERR! System Windows_NT 10.0.26100 │ gyp ERR! command "D:\\projects\\nvm\\nodejs\\node.exe" "D:\\projects\\nvm\\nvm\\v22.10.0\\node_modules\\pnpm\\dist\… │ gyp ERR! cwd D:\projects\fuzhou\fuzhou.project-all-app\node_modules\.pnpm\canvas@2.11.2\node_modules\canvas │ gyp ERR! node -v v22.10.0 │ gyp ERR! node-gyp -v v10.1.0 │ gyp ERR! not ok │ node-pre-gyp ERR! build error │ node-pre-gyp ERR! stack Error: Failed to execute 'D:\projects\nvm\nodejs\node.exe D:\projects\nvm\nvm\v22.10.0\node… │ node-pre-gyp ERR! stack at ChildProcess.<anonymous> (D:\projects\fuzhou\fuzhou.project-all-app\node_modules\.pn… │ node-pre-gyp ERR! stack at ChildProcess.emit (node:events:518:28) │ node-pre-gyp ERR! stack at maybeClose (node:internal/child_process:1104:16) │ node-pre-gyp ERR! stack at ChildProcess._handle.onexit (node:internal/child_process:304:5) │ node-pre-gyp ERR! System Windows_NT 10.0.26100 │ node-pre-gyp ERR! command "D:\\projects\\nvm\\nodejs\\node.exe" "D:\\projects\\fuzhou\\fuzhou.project-all-app\\node… │ node-pre-gyp ERR! cwd D:\projects\fuzhou\fuzhou.project-all-app\node_modules\.pnpm\canvas@2.11.2\node_modules\canvas │ node-pre-gyp ERR! node -v v22.10.0 │ node-pre-gyp ERR! node-pre-gyp -v v1.0.11 │ node-pre-gyp ERR! not ok │ Failed to execute 'D:\projects\nvm\nodejs\node.exe D:\projects\nvm\nvm\v22.10.0\node_modules\pnpm\dist\node_modules… └─ Failed in 1.3s at D:\projects\fuzhou\fuzhou.project-all-app\node_modules\.pnpm\canvas@2.11.2\node_modules\canvas  ELIFECYCLE  Command failed with exit code 1.
09-05
- 原因：node-gyp需要Python，通常需要Python 2.7或3.x（注意：node-gyp现在支持Python3，但有些旧版本可能仍需要Python2）。 - 解决方案：确保系统安装了Python，并且node-gyp能找到它。 综合解决方案： 步骤...
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