VSCode Python Intellisense 功能异常按回车时代码被篡改求助

我的系统配置如下：

使用Pylance时，Intellisense无法正常工作：

切换到Jedi时，Intellisense依然无法正常工作：

按下回车键时，代码会被完全打乱。该问题已经严重影响开发效率。
我的settings.json配置文件内容如下：

{
    "AREPL.pythonPath": "${workspaceFolder}\\.venv\\Scripts\\python.exe",
    "dicom.alwaysShowMenu": true,
    "editor.codeActionsOnSave": {
        "source.organizeImports": true
    },
    "editor.formatOnSave": true,
    "editor.insertSpaces": false,
    "editor.rulers": [
        90
    ],
    "editor.suggestSelection": "first",
    "explorer.compactFolders": false,
    "explorer.confirmDragAndDrop": false,
    "files.exclude": {
        "**/.git": false
    },
    "files.trimFinalNewlines": true,
    "files.trimTrailingWhitespace": true,
    "git-graph.defaultColumnVisibility": {
        "Author": false,
        "Commit": true,
        "Date": false
    },
    "git-graph.referenceLabels.alignment": "Branches (aligned to the graph) & Tags (on the right)",
    "glassit.alpha": 255,
    "json.format.enable": true,
    "mypy.dmypyExecutable": "${workspaceFolder}\\.venv\\Scripts\\dmypy.exe",
    "mypy.runUsingActiveInterpreter": true,
    "notebook.cellToolbarLocation": {
        "default": "right",
        "jupyter-notebook": "left"
    },
    "python.defaultInterpreterPath": "${workspaceFolder}\\.venv\\Scripts\\python.exe",
    "python.formatting.blackArgs": [
        "--line-length",
        "90"
    ],
    "python.formatting.provider": "black",
    "python.languageServer": "Jedi",
    "python.linting.enabled": true,
    // "python.linting.flake8Args": [
    //     "--line-length",
    //     "90"
    // ],
    "python.linting.mypyEnabled": true,
    "python.linting.mypyPath": "${workspaceFolder}\\.venv\\Scripts\\mypy.exe",
    // "python.linting.pylintArgs": [
    //     "--generate-members"
    // ],
    // "python.linting.pylintEnabled": true,
    "python.pythonPath": "${workspaceFolder}\\.venv\\Scripts\\python.exe",
    "python.terminal.activateEnvironment": true,
    "python.testing.pytestArgs": [
        "${workspaceFolder}\\tests"
    ],
    "python.testing.pytestEnabled": true,
    "python.testing.unittestEnabled": true,
    "python.venvPath": ".venv",
    "restructuredtext.builtDocumentationPath": "${workspaceFolder}\\docs\\build\\html",
    "restructuredtext.confPath": "{workspaceFolder}\\docs\\source",
    "restructuredtext.languageserver.disabled": true,
    "restructuredtext.sphinxBuildPath": "${workspaceFolder}\\.venv\\Scripts\\sphinx-build.exe",
    "screencastMode.keyboardOverlayTimeout": 1500,
    "screencastMode.mouseIndicatorSize": 20,
    "screencastMode.onlyKeyboardShortcuts": true,
    "screencastMode.verticalOffset": 0,
    "security.workspace.trust.untrustedFiles": "open",
    "shellcheck.customargs": [
        "-x"
    ],
    "terminal.integrated.defaultProfile.windows": "PowerShell",
    "terminal.integrated.fontFamily": "CaskaydiaCove Nerd Font Mono",
    "terminal.integrated.tabs.enabled": true,
    "trailing-spaces.syntaxIgnore": [
        "markdown"
    ],
    "update.enableWindowsBackgroundUpdates": false,
    "vsicons.dontShowNewVersionMessage": true,
    "workbench.colorTheme": "Predawn",
    "workbench.editor.enablePreview": true,
    "workbench.editorAssociations": {
        "*.dcm": "default",
        "*.ipynb": "jupyter-notebook",
        "*.tiff": "tiff.preview",
        "git-rebase-todo": "default"
    },
    "workbench.iconTheme": "material-icon-theme",
    "workbench.settings.editor": "json",
    "workbench.settings.openDefaultSettings": true,
    "workbench.settings.useSplitJSON": true,
    "workbench.startupEditor": "newUntitledFile"
}

请问该问题是由什么原因导致的？该如何修复Intellisense功能？

问题更新 #

删除配置项"editor.suggestSelection": "first"后问题有所缓解，但仍存在异常：

问题原因 #

1. 核心冲突是你配置了editor.insertSpaces: false使用制表符缩进，但当前Python项目的其余代码用的是空格缩进，补全触发时缩进规则冲突导致代码排版错乱。
2. 虚拟环境路径的反斜杠没有正确转义，部分版本的Pylance/Jedi解析路径时会出错，无法正确加载项目索引，导致补全匹配异常。
3. 同时启用了python.testing.pytestEnabled和python.testing.unittestEnabled两个测试框架，部分版本的Python扩展会触发索引扫描冲突，拖慢补全响应，导致回车时补全项误触发插入。

修复步骤 #

• 调整缩进规则：要么统一项目全部用制表符缩进，要么把editor.insertSpaces改为true，editor.tabSize设为4，和Python通用规范对齐。
• 修正配置里所有虚拟环境路径的反斜杠，要么用双反斜杠\\转义，要么直接用正斜杠/，避免路径解析错误。
• 关闭不需要的测试框架，二选一保留pytest或者unittest的启用配置。
• 如果问题仍存在，先禁用所有非核心Python相关的扩展（比如AREPL、dicom预览、restructuredtext相关扩展），排查是否是扩展冲突导致的补全异常。
• 最后重置Python扩展的缓存：按下Ctrl+Shift+P，执行Python: Clear Cache and Reload Window命令，重新加载项目索引。

内容的提问来源于stack exchange，提问作者adam.hendry