Python uvicorn：术语“uvicorn”不被识别为 cmdlet、函数、脚本文件的名称

Question

Python uvicorn：术语“uvicorn”不被识别为 cmdlet、函数、脚本文件的名称

晚上好，

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我正在使用 python 3.9 并尝试根据互联网上的文档在 Windows 10 Pro 上运行新的 FastAPI 服务https://www.uvicorn.org/我执行了以下语句

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pip install uvicorn pip install uvicorn[standard]\n

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创建示例文件 app.py

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from fastapi import FastAPI\n\napp = FastAPI()\n\n\n@app.get("/")\nasync def root():\n    return {"message": "Hello World"}\n

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但是当我运行下面的代码时：

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uvicorn main:app --reload\n\n\nuvicorn : The term \'uvicorn\' is not recognized as the name of a cmdlet, function, script file, or operable program. Check the spelling of the name, or if a path was included, verify t\nhat the path is correct and try again.\nAt line:1 char:1\n+ uvicorn\n+ ~~~~~~~\n    + CategoryInfo          : ObjectNotFound: (uvicorn:String) [], CommandNotFoundException\n    + FullyQualifiedErrorId : CommandNotFoundException\n

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我还在环境设置中添加了Python的路径

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我还重新安装了Python 3.9，并将默认安装路径设置为c:\\ProgramFiles\\Python39，该路径现在也包含在系统环境和用户环境设置中。

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如果我再次运行 pip install uvicorn ，它会显示以下语句：

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\xce\xbb pip install uvicorn\nDefaulting to user installation because normal site-packages is not writeable\nRequirement already satisfied: uvicorn in c:\\users\\username\\appdata\\roaming\\python\\python39\\site-packages (0.12.2)\nRequirement already satisfied: h11>=0.8 in c:\\users\\username\\appdata\\roaming\\python\\python39\\site-packages (from uvicorn) (0.11.0)\nRequirement already satisfied: click==7.* in c:\\users\\username\\appdata\\roaming\\python\\python39\\site-packages (from uvicorn) (7.1.2)\nWARNING: You are using pip version 20.2.3; however, version 20.2.4 is available.\nYou should consider upgrading via the \'c:\\program files\\python39\\python.exe -m pip install --upgrade pip\' command.\n

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非常感谢

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埃里克

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