没有名为streamlit的模块

Question

我在windows 10上安装了最新版本的anaconda with pip。我通过使用streamlit hello启动streamlit来确认安装。但是当我想在vs code或空闲shell中导入streamlit时，它会给出这个错误:

Traceback(最近一次调用):文件"C:UsersHPAppDataLocalProgramsPythonPython310website2.py&quot将streamlit导入为stModuleNotFoundError: No module named 'streamlit'

Answer 1

确保你选择了正确的Python解释器:ctrl+shift+P在vscode上打开命令栏并输入&;Python Select interpreter &;。搜索ananconda或conda，您应该有一个可用的口译员列表。选择一个适合你需要的。

Answer 2

看起来您已经在不同的路径/虚拟环境中安装了python和anaconda，并且您已经在PC中安装了python(程序文件)。你还在虚拟环境中安装了streamlit。然后，您必须首先通过conda activate <virtial_env_name>激活虚拟环境。如果您不记得在创建时给vir_env指定的名称，您可以通过conda列出可用的vir_env名称。

尝试导入streamlit的IDLE应该是与您正在使用的默认python解释器一起安装的IDLE。在vs code中，你也使用默认值。所以你必须通过vs code终端或vs code命令面板激活虚拟环境，点击ctrl+shift+P并输入python select interpreter

Answer 3

这是在windows上开始使用流光的一种方法。

1. Create a folder say c:myproject
You can do this on other drives.
2. Open your powershell and cd or Change Directory to that folder
3. PS c:myproject>python --version
to see if you have python installed and what version
4. PS c:myproject>python -m venv venv
Creates venv folder for your virtual environment under
c:myproject with python installed.
You only need to create this once.
5. PS c:myproject>./venv/scripts/activate
That will activate your virtual environment, always do this if not
yet activated.
6. (venv) PS c:myproject>python -m pip install -U pip
to update your pip
7. (venv) PS c:myproject>pip install streamlit
That will install streamlit in the venv folder.
You can now open c:myproject with your vs code or
other editor and write codes in say app.py.
8. (venv) PS c:myproject>streamlit run app.py
to run your streamlit app

注意(venv)表示您的虚拟环境是活动的。只有在venv激活时才安装lib/modules。安装的模块将在venv文件夹中找到。当venv激活时也运行streamlit