python - 未找到 'uvloop>=0.14.0' 分布，它是 uvicorn 所必需的

Question

我是学习 FastAPI 的新手，一开始我就被卡住了。我不断收到以下错误：

(venv) root@Xue:/home/proyectos/FastAPI# uvicorn main.py:app --reload
Traceback (most recent call last):
  File "/usr/bin/uvicorn", line 6, in <module>
    from pkg_resources import load_entry_point
  File "/usr/lib/python3/dist-packages/pkg_resources/__init__.py", line 3254, in <module>
    def _initialize_master_working_set():
  File "/usr/lib/python3/dist-packages/pkg_resources/__init__.py", line 3237, in _call_aside
    f(*args, **kwargs)
  File "/usr/lib/python3/dist-packages/pkg_resources/__init__.py", line 3266, in _initialize_master_working_set
    working_set = WorkingSet._build_master()
  File "/usr/lib/python3/dist-packages/pkg_resources/__init__.py", line 584, in _build_master
    ws.require(__requires__)
  File "/usr/lib/python3/dist-packages/pkg_resources/__init__.py", line 901, in require
    needed = self.resolve(parse_requirements(requirements))
  File "/usr/lib/python3/dist-packages/pkg_resources/__init__.py", line 787, in resolve
    raise DistributionNotFound(req, requirers)
pkg_resources.DistributionNotFound: The 'uvloop>=0.14.0' distribution was not found and is required by uvicorn

这是我的python代码：

from fastapi import FastAPI

app = FastAPI()

@app.get("/")
def home():
    return {'Hello': 'World'}

我已经尝试过pip install -U uvloop pip, pip install uvloop==0.14.0但没有修复。

Answer 1

pip uninstall -r requirements.txt -y

然后使用安装 FastAPI

pip install FastAPI[all]

Answer 2

我有这样的问题。首先，激活你的 venv：

source venv/bin/activate

要求中的冻结和安全点列表：

pip freeze > requirements.txt

卸载：

pip uninstall -r requirements.txt -y

停用：

rm -r venv/

在此之后，您必须重新制作 venv：

python3 -m venv venv

并安装所有必要的文件。