How to create virtual env with python3

Question

I am using python 2.7 + virtualenv version 1.10.1 for running myproject projects. Due to some other projects requirement I have to work with other version of python(Python 3.5) and Django 1.9. For this I have installed python in my user directory. Also I have dowloaded and installed virtualenv( version - 15.1.0) into my user directory. But whenever I am trying to create virtual env I am getting the below error

python virtualenv/virtualenv.py myproject

Using base prefix '/home/myuser/python3'
New python executable in /home/mount/myuser/project_python3/myproject/bin/python
ERROR: The executable /home/mount/myuser/project_python3/myproject/bin/python is not functioning
ERROR: It thinks sys.prefix is '/home/myuser/python3' (should be '/home/mount/myuser/project_python3/myproject')
ERROR: virtualenv is not compatible with this system or executable

Can anybody tell what I am doing wrong with this

It's not clear which Python you are using when you run `python virtualenv/virtualenv.py myproject`. Is `python` here your system Python (2.7) or your local Python (3.5)? — Chris, Mar 28 '17 at 12:38
Did you use the correct pip, i.e. pip3, to install virtualenv version - 15.1.0? — PM 2Ring, Mar 28 '17 at 12:43
I always find [these docs](http://python-guide-pt-br.readthedocs.io/en/latest/dev/virtualenvs/) helpful. — blacksite, Mar 28 '17 at 12:56
Generally, `python` means Python 2, you need to use `python3` to refer to Python 3. Eg, `python3 -m pip install some_package`. But as others have said, it's better to use the `venv` module that is included in recent versions of Python 3. — PM 2Ring, Mar 28 '17 at 13:45
@PM2Ring I have updated my bashrc_profile with path . That' the reason I am referring python :). BTW I have installed the python 3.5.3 manually — Anish, Mar 28 '17 at 13:52
Hmmm. That may not be wise if you have stuff that expects `python` to refer to Python 2, eg Python 2 scripts that aren't Python 3 compatible and which have a `#!/usr/bin/env python` shebang line. A safer way is to make `python` an alias for `python3`. — PM 2Ring, Mar 28 '17 at 14:12
@PM2Ring . Thanks for you suggestion. I have created an alias for python3 in my bashrc_profile — Anish, Mar 30 '17 at 04:08
See also https://stackoverflow.com/questions/41573587/what-is-the-difference-between-venv-pyvenv-pyenv-virtualenv-virtualenvwrappe Currently the number of "recommended methods" of creating virtual env's in python continues to increase; see also: (1) ["Pipenv is the officially recommended Python packaging tool from Python.org"](https://docs.pipenv.org/) and (2) http://docs.python-guide.org/en/latest/dev/virtualenvs/ and (3) [xkcd: Standards](https://xkcd.com/927/) — michael, Nov 24 '17 at 23:25

score 81 · Accepted Answer · answered Mar 28 '17 at 13:00

81

In Python 3.6+, the pyvenv module is deprecated. Use the following one-liner instead:

python3 -m venv <myenvname>

This is the recommended way to create virtual environments by the Python community.

answered Mar 28 '17 at 13:00

The Aelfinn

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score 8 · Answer 2 · answered Sep 04 '19 at 08:25

8

To create virtual env

virtualenv -p python3 venv_name

This will create new python executable in baseDirectory/bin/python3

How to activate newely created Venv:

cd baseDirectory/bin/  

source activate

Deactivate new venv

deactivate

answered Sep 04 '19 at 08:25

cryptoKTM

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Worth to remember is what people are saying below: since Python version 3.3, there is no need to install and use `virtualenv`, as `venv` exists as an embedded module. Btw. creating alias for `source venv/bin/activate` is much more efficient than cd and activating it. – pdaawr May 25 '21 at 12:11

score 6 · Answer 3 · answered Mar 28 '17 at 12:44

Python already ships with its builtin "virtualenv" called venv since version 3.3. You no longer need to install or download the virtualenv scripts for Python 3.3+.

https://docs.python.org/3/library/venv.html

Check that your installation provided the pyvenv command that should take care of creating the "virtualenv". Arguments are similar to the classic virtualenv project.

$ pyvenv --help
usage: venv [-h] [--system-site-packages] [--symlinks | --copies] [--clear]
            [--upgrade] [--without-pip]
            ENV_DIR [ENV_DIR ...]

Creates virtual Python environments in one or more target directories.

positional arguments:
  ENV_DIR               A directory to create the environment in.

optional arguments:
  -h, --help            show this help message and exit
  --system-site-packages
                        Give the virtual environment access to the system
                        site-packages dir.
  --symlinks            Try to use symlinks rather than copies, when symlinks
                        are not the default for the platform.
  --copies              Try to use copies rather than symlinks, even when
                        symlinks are the default for the platform.
  --clear               Delete the contents of the environment directory if it
                        already exists, before environment creation.
  --upgrade             Upgrade the environment directory to use this version
                        of Python, assuming Python has been upgraded in-place.
  --without-pip         Skips installing or upgrading pip in the virtual
                        environment (pip is bootstrapped by default)

Once an environment has been created, you may wish to activate it, e.g. by
sourcing an activate script in its bin directory.

This script is deprecated in Python 3.6+, although the module still exists. The recommended use is: ``python3 -m venv `` — The Aelfinn, Mar 28 '17 at 13:05
@user73657 I am using python 3.5 . But if i run the command pyenv its saying command not found — Anish, Mar 28 '17 at 13:23
Great, @Anish! Please remember to [accept](https://meta.stackexchange.com/questions/5234/how-does-accepting-an-answer-work) answers that solve your problem. — Chris, Mar 28 '17 at 15:31

score 1 · Answer 4 · edited Jun 02 '20 at 08:48

Since the launch of Python version 3.3, there has been no need to download the virtualenv package separately as it comes built-in in Python.

Refer to the documentation to gain complete insights on it.

Test the installation of virtualenv:

$ virtualenv --version

Usage:

1.Creating a virtual environment:
$ virtualenv --system-site-packages -p python3 ./virtual_env_name

2.For enabling it, use the following command:
$ source ./virtual_env_name/bin/activate

3.For disabling the virtual environment and get back to working with the local environment:
$ deactivate

For listing down the packages in the virtual environment, use the following command:
$ pip3 list

score 0 · Answer 5 · answered Mar 03 '19 at 07:41

0

I install it using the command (for Python 3.x),

$ python3 -m venv env

answered Mar 03 '19 at 07:41

Arefe

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score 0 · Answer 6 · edited Apr 20 '20 at 14:58

0

To create a virtual environment in python3:

virtualenv -p /usr/bin/python3 virtualenvname

After creating the virtual environment, we need to activate it using the below command:

source virtualenvname/bin/activate

to deactivate use the below command:

deactivate

edited Apr 20 '20 at 14:58

OM Bharatiya

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answered Feb 19 '20 at 03:23

VIJAYA SRI

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score 0 · Answer 7 · answered Aug 16 '20 at 23:34

virtualenv is the tool of choice for Python 2, while venv handles the task in Python 3.

Yet you can create the virtual environment for Python 3 using any of them.

Using `venv`

python3 -m venv virtualenvname

Command Syntax:

/path/to/python3 -m venv /path/to/directory/virtual_env_name

Using `virtualenv`

virtualenv -p python3 virtualenvname

Command Syntax:

virtualenv -p /path/to/python3 /path/to/directory/virtual_env_name

Activate the virtual environment

On Linux, Unix or MacOS, using the terminal or bash shell:

source /path/to/venv/bin/activate

e.g. source virtualenvname/bin/activate

On Unix or MacOS, using the csh shell:

source /path/to/venv/bin/activate.csh

On Unix or MacOS, using the fish shell:

source /path/to/venv/bin/activate.fish

On Windows using the Command Prompt:

path\to\venv\Scripts\activate.bat

On Windows using PowerShell:

path\to\venv\Scripts\Activate.ps1

Deactivating the virtual environment

On Linux, Unix or MacOS, using the terminal or bash shell:

deactivate

On Windows using the Command Prompt:

path\to\venv\Scripts\deactivate.bat

On Windows using PowerShell:

deactivate

This answer is for those who may use a different OS.

score -1 · Answer 8 · answered Mar 28 '17 at 13:05

-1

Install virtualenvwrapper on top of virtualenv to simplify things. Follow the blog to install in easy steps: virtualenvwrapper

Steps to create it:

mkvirtualenv -p /usr/bin/python3
Install packages using - pip install package_name
workon - activates the virtualenv, deactivate - deactivates the viirtualenv

answered Mar 28 '17 at 13:05

Henin RK

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How will adding a wrapper around `virtualenv` help if `virtualenv` itself isn't working? – Chris Mar 28 '17 at 13:39
This is a repeated answer. This is also an incorrect answer. virtualenv is deprecated, this is a wrapper around virtualenv – The Aelfinn Mar 28 '17 at 14:10

How to create virtual env with python3

8 Answers8

Using `venv`

Using `virtualenv`

Activate the virtual environment

Deactivating the virtual environment

Linked

Related

How to create virtual env with python3

8 Answers8

Using venv

Using virtualenv

Activate the virtual environment

Deactivating the virtual environment

Linked

Related

Using `venv`

Using `virtualenv`