基本“hello world”教程中的 FastAPI“错误：python-multipart 构建轮失败”

Question

我关注FastAPI "hello world" tutorial。作为第 1 步，我需要运行（我在 venv 中使用 python 3.8）：

pip install "fastapi[all]"

但我明白了：

Building wheels for collected packages: python-multipart
  Building wheel for python-multipart (setup.py) ... error
  ERROR: Command errored out with exit status 1:
   command: venv/my_venv/bin/python3 -u -c 'import sys, setuptools, tokenize; sys.argv[0] = '"'"'/tmp/pip-install-u0lo92at/python-multipart/setup.py'"'"'; __file__='"'"'/tmp/pip-install-u0lo92at/python-multipart/setup.py'"'"';f=getattr(tokenize, '"'"'open'"'"', open)(__file__);code=f.read().replace('"'"'\r\n'"'"', '"'"'\n'"'"');f.close();exec(compile(code, __file__, '"'"'exec'"'"'))' bdist_wheel -d /tmp/pip-wheel-f5_nolf4
       cwd: /tmp/pip-install-u0lo92at/python-multipart/
  Complete output (6 lines):
  usage: setup.py [global_opts] cmd1 [cmd1_opts] [cmd2 [cmd2_opts] ...]
     or: setup.py --help [cmd1 cmd2 ...]
     or: setup.py --help-commands
     or: setup.py cmd --help
  
  error: invalid command 'bdist_wheel'
  ----------------------------------------
  ERROR: Failed building wheel for python-multipart
  Running setup.py clean for python-multipart
Failed to build python-multipart

当我转到第 2 步时，它说：

$ uvicorn main:app --reload

Command 'uvicorn' not found, but can be installed with:

sudo apt install uvicorn

虽然说uvicorn一开始是用命令安装的：

Answer 1

只需重新安装即可。

pip install "fastapi[all]"

之后就可以运行了

uvicorn main:app --reload

无需进一步安装。