无法找到或创建新的 virtualenv

问题描述

我刚刚获得 Python 3.5.2 并想创建一个 virtualenv.

我以前做过这个.现在，我在 Python2.7 项目上有一个 virtualenv，我仍然可以使用 source bin/activate 打开它.

但是尽我所能，从/home 或/path/to/virtualenv 或/path/to/virtualenv-$，无论是否在命令行中添加 sudo 和 python，我只能得到一个响应:没有这样的文件或目录.

这是带有 -p 标志的，因此它将使用 3.5.2，因为 2.7.12 仍然是我的默认值.如果坏了，为什么我为2.7创建的virtualenv还激活?

然后我从 3.5.2 解释器中尝试了 pyvenv 和 venv(我以前从未使用过):

>>>pyvenv/home/malikarumi/项目/艾莎回溯(最近一次调用最后一次):文件<stdin>"，第 1 行，在 <module> 中NameError: 名称 'pyvenv' 未定义>>>venv/home/malikarumi/Projects/aishah回溯(最近一次调用最后一次):文件<stdin>"，第 1 行，在 <module> 中NameError: 名称 'venv' 未定义

来自 bash:

malikarumi@Tetuoan2:~$ malikarumi@Tetuoan2:/usr/local/bin$ python3.5 pyvenv ~/Projects/aishahbash: malikarumi@Tetuoan2:/usr/local/bin$: 没有那个文件或目录malikarumi@Tetuoan2:~$ malikarumi@Tetuoan2:/usr/local/bin$ python3.5 venv ~/Projects/aishahbash: malikarumi@Tetuoan2:/usr/local/bin$: 没有那个文件或目录

我做错了什么?

解决方案

使用 virtualenv

首先，您应该验证是否真的为 Python 3.5 安装了 virtualenv:

python3.5 -m pip list

如果不是，则使用发行版的包管理器或运行 python3.5 -m pip install virtualenv 安装它.

然后您可以运行 python3.5 -m virtualenv <newvenv> 它应该会为您创建一个使用 Python 3.5 的新 virtualenv.

使用已经是 Python 3.5 标准库一部分的 venv

只需运行 python3.5 -m venv 就可以完成这项工作.

I just got Python 3.5.2 and wanted to create a virtualenv.

I have done this before. Right now, I have a virtualenv on a Python2.7 project that I can still open with source bin/activate.

But try as I might, from /home, or from /path/to/virtualenv, or /path/to/virtualenv-$, with or without sudo and python prepended on the command line, I only get one response: no such file or directory.

This was with the -p flag so it would use 3.5.2, because 2.7.12 is still my default. If it is broken, why does the virtualenv I created for 2.7 still activate?

Then I tried pyvenv and venv (which I've never used before) from the 3.5.2 interpreter:

>>> pyvenv /home/malikarumi/Projects/aishah
Traceback (most recent call last):
File "<stdin>", line 1, in <module>
NameError: name 'pyvenv' is not defined
>>> venv /home/malikarumi/Projects/aishah
Traceback (most recent call last):
File "<stdin>", line 1, in <module>
NameError: name 'venv' is not defined

and from bash:

malikarumi@Tetuoan2:~$ malikarumi@Tetuoan2:/usr/local/bin$ python3.5    pyvenv ~/Projects/aishah
bash: malikarumi@Tetuoan2:/usr/local/bin$: No such file or directory
malikarumi@Tetuoan2:~$ malikarumi@Tetuoan2:/usr/local/bin$ python3.5 venv ~/Projects/aishah
bash: malikarumi@Tetuoan2:/usr/local/bin$: No such file or directory

What am I doing wrong?

解决方案

Using virtualenv

First of all you should verify that virtualenv is really installed for Python 3.5:

python3.5 -m pip list

If it's not then install it either with the package manager of your distribution or by running python3.5 -m pip install virtualenv.

Then you can run python3.5 -m virtualenv <newvenv> and it should create a new virtualenv using Python 3.5 for you.

Using venv that is already part of the standard library in Python 3.5

Simply running python3.5 -m venv <newvenv> should do the job.

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