本文介绍了如何指定用于创建虚拟环境的 python 版本?的处理方法，对大家解决问题具有一定的参考价值，需要的朋友们下面随着跟版网的小编来一起学习吧！
问题描述
My Python virtual environments use python3.6 when I create them using virtualenv
~ $ virtualenv my_env
but I need to use python3.5 as 3.6 is not currently supported by Opencv3.
I've tried using the --python=<py_version> flag when creating a virtual environment but this doesn't work.
How do I specify the python (3.x) version to install using virtualenv for Mac and/or Linux?
解决方案
Assuming that you have installed python3 or any desired version of Python (2.6, 2.7, 3.5, 3.6), Now while creating the virtual environment directly pass the python executable path. Hence here are few valid example
$ virtualenv new_p2_env # Creates a new default python environment (usually python 2)
$ virtualenv -p python3 new_p3_env # Creates a new default python3 (python3 must be a valid command i.e found in the PATH)
And last
# Directly point to any version of python binary, this can be even another virtualenv's bin/python.
$ virtualenv -p /path/to/any/bin/python new_env
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