ModuleNotFoundError：没有名为“httpx”的模块

Question

安装正确的软件包后出现上述错误

Python --版本

Python 3.6.9

安装命令

pip3 安装 httpx

点 3 列表

anyio (3.6.1)
async-generator (1.10)
Brotli (1.0.9)
certifi (2022.6.15)
charset-normalizer (2.1.0)
contextvars (2.4)
dataclasses (0.8)
dnspython (2.2.1)
email-validator (1.2.1)
h11 (0.12.0)
httpcore (0.14.7)
httpx (0.22.0)
idna (3.3)
immutables (0.18)
MarkupSafe (2.0.1)
pip (9.0.1)
pkg-resources (0.0.0)
pydantic (1.9.1)
python-dateutil (2.8.2)
rfc3986 (1.5.0)
setuptools (39.0.1)
six (1.16.0)
sniffio (1.2.0)
typing-extensions (4.1.1)
validator (0.7.1)

在虚拟环境交互式 shell 中，该包也可以正常工作

    (env) PEOPLE\saurabhkamble@lp7948:/var/www/vip_select_shaadi_api$ uvicorn main:app --reload
    INFO:     Will watch for changes in these directories: ['/var/www/vip_select_shaadi_api']
    INFO:     Uvicorn running on http://127.0.0.1:8000 (Press CTRL+C to quit)
    INFO:     Started reloader process [15073] using statreload
    None
    Process SpawnProcess-1:
    Traceback (most recent call last):
      File "/usr/lib/python3.6/multiprocessing/process.py", line 258, in _bootstrap
        self.run()
      File "/usr/lib/python3.6/multiprocessing/process.py", line 93, in run
        self._target(*self._args, **self._kwargs)
      File "/home/saurabhkamble/.local/lib/python3.6/site-packages/uvicorn/subprocess.py", line 76, in subprocess_started
        target(sockets=sockets)
      File "/home/saurabhkamble/.local/lib/python3.6/site-packages/uvicorn/server.py", line 69, in run
        return asyncio.get_event_loop().run_until_complete(self.serve(sockets=sockets))
      File "/usr/lib/python3.6/asyncio/base_events.py", line 484, in run_until_complete
        return future.result()
      File "/home/saurabhkamble/.local/lib/python3.6/site-packages/uvicorn/server.py", line 76, in serve
        config.load()
      File "/home/saurabhkamble/.local/lib/python3.6/site-packages/uvicorn/config.py", line 456, in load
        self.loaded_app = import_from_string(self.app)
      File "/home/saurabhkamble/.local/lib/python3.6/site-packages/uvicorn/importer.py", line 24, in import_from_string
        raise exc from None
      File "/home/saurabhkamble/.local/lib/python3.6/site-packages/uvicorn/importer.py", line 21, in import_from_string
        module = importlib.import_module(module_str)
      File "/usr/lib/python3.6/importlib/__init__.py", line 126, in import_module
        return _bootstrap._gcd_import(name[level:], package, level)
      File "<frozen importlib._bootstrap>", line 994, in _gcd_import
      File "<frozen importlib._bootstrap>", line 971, in _find_and_load
      File "<frozen importlib._bootstrap>", line 955, in _find_and_load_unlocked
      File "<frozen importlib._bootstrap>", line 665, in _load_unlocked
      File "<frozen importlib._bootstrap_external>", line 678, in exec_module
      File "<frozen importlib._bootstrap>", line 219, in _call_with_frames_removed
      File "./main.py", line 3, in <module>
        from routes.member import routes_member
      File "./routes/member.py", line 5, in <module>
        from api import  universities
      File "./api/universities.py", line 3, in <module>
        import httpx
    ModuleNotFoundError: No module named 'httpx'
    INFO:     Stopping reloader process [15073]

在本地运行 Fastapi 时出错

(env) PEOPLE\saurabhkamble@lp7948:/var/www/vip_select_shaadi_api$ python3
Python 3.6.9 (default, Mar 15 2022, 13:55:28) 
[GCC 8.4.0] on linux
Type "help", "copyright", "credits" or "license" for more information.
>>> import httpx
>>> r = httpx.get('https://www.example.org/')
^[[Ar
<Response [200 OK]>

Answer 1

有相同的错误消息，这为我解决了

pip3 install httpx

Answer 2

您uvicorn似乎位于 virtualenv 之外（从您的提示中可以明显看出其使用(env) ），在~/.local（您的用户站点包目录）中。uvicorn删除它，然后在您的环境中安装并使用。

1. 未env激活：pip uninstall --user -y uvicorn
2. 激活后env：pip install uvicorn

您可能还想检查不应在 venv: 外部安装的其他软件包，pip list --user并类似地卸载它们以避免进一步的冲突。

您还可以PIP_REQUIRE_VIRTUALENV=false在环境变量设置中进行设置，以防止您将来意外地在 virtualenv 之外安装软件包。