Python 2和Python 3混合错误与虚拟环境？

Question

1）我用安装程序在Windows上安装了python3.5。我检查了设置路径。

2）我用安装程序在Windows上安装了python2.7。我检查了设置路径。

• python 3位于C：\ Users \ amand \ AppData \ Local \ Programs \ Python \ Python35-32
• python 2在C：\ Python27
中找到

3）我打开命令提示符

>>> python -m venv tutorial-env
C:\Python27\python.exe: No module named venv

好的......那么......

>>>py -3
Python 3.5.2 (v3.5.2:4def2a2901a5, Jun 25 2016, 22:01:18) [MSC v.1900 32 bit      
(Intel)] on win32
Type "help", "copyright", "credits" or "license" for more information.

>>>python -m venv tutorial-env
>File "<stdin>", line 1
python -m venv tutorial-env
             ^
SyntaxError: invalid syntax

好。我关闭了命令提示符并启动了一个新命令。该文件说使用这个......但是......

>>>>python3 -m venv tutorial-env
'python3' is not recognized as an internal or external command,
operable program or batch file.

我所指的文档 https://docs.python.org/3/tutorial/venv.html

Answer 1

使用特定的python：

python3 -m venv tutorial-env #for python 3
python2 -m venv tutorial-env #for python 2
#if you have multple versions of 3 or 2
python2.7 -m venv tutorial-env #for python 2.7
python3.5 -m venv tutorial-env #for python 3.5 or something along the lines

修改

如果在Windows及以上版本中无效：

#In command prompt
py -3 #or -2
>>> import venv
>>> venv.main('tutorial-env')

或

py -3 -m venv tutorial-env