如何确保python脚本使用虚拟环境? [英] How to make sure python script uses virtual environment?

问题描述

我创建了虚拟环境并激活了它.已安装的包，但无法从虚拟环境中导入.

I created virtual environment and activate it. installed packages but unable to import them from virtual environment.

pip freeze:

但尝试导入模块时出错:

But getting error trying to import module:

Traceback (most recent call last):
  File "z:\Documents\Python\Projects\ProjectName\tempCodeRunnerFile.py", line 1, in <module>
    import paramiko
ModuleNotFoundError: No module named 'paramiko'

如何确保.py文件使用虚拟环境?

How to make sure .py file uses virtual environment?

还有如果我跑

import sys
print(sys.path)

结果:

'C:\\Users\\Username\\AppData\\Local\\Programs\\Python\\Python37\\lib\\site-packages' 

所以它不使用虚拟环境，对吗?

So it does not uses virtual environment, is that correct?

推荐答案

在许多情况下，没有必要激活虚拟环境.通常，您可以在不激活虚拟环境的情况下从任何地方执行以下操作:

In many cases it's not necessary to activate a virtual environment. Typically you could do something like the following from anywhere without activating the virtual environment:

• C:\path\to\venv\Scripts\python.exe -m pip somecommand
• C:\path\to\venv\Scripts\python.exe different\path\to\script.py
• 等

此外，您可以将 python.exe 的绝对路径指定为 Python 脚本顶部的she-bang，然后直接执行脚本(例如双击)，无需显式调用 Python.

Additionally you could specify the absolute path to the python.exe as a she-bang at the top of your Python script, and execute the script directly (for example with a double-click) without calling Python explicitly.

#!/path/to/venv/bin/python3

print("Hello world")

参考资料:

• https://docs.python.org/3/using/windows.html#shebang-lines
• https://docs.python.org/3/library/venv.html#creating-virtual-environments

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