PythonVirtualEnv - Revision history

Mbaney at 14:21, 12 December 2025

2025-12-12T14:21:26Z

← Older revision		Revision as of 14:21, 12 December 2025
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	==Basic Usage==		==Basic Usage==
	The following steps outline how to create a virtual environment using the system Python. Please note that Python virtual environments are not relocatable after being installed, so consider the install location carefully. Home directories ~~may~~ have [[Quota \| quotas]] that are not suited for very large environments.		The following steps outline how to create a virtual environment using the system Python. Please note that Python virtual environments are not relocatable after being installed, so consider the install location carefully. Home directories have [[Quota \| quotas]] that are not suited for very large environments, so a network or local scratch directory is most likely more appropriate.

	====Creating the virtual environment on Python 3====		====Creating the virtual environment on Python 3====
	Python 3 on [[RHEL \| Red Hat Enterprise Linux (RHEL)]] comes with the virtualenv module built in. If you are running [[Ubuntu]] on a UMIACS-supported workstation, please contact [[HelpDesk \| UMIACS Staff]] to install venv on your machine. In the below example, <tt>env</tt> is the virtual environment name. You can substitute in any other name of your choosing.		Python 3 on [[RHEL \| Red Hat Enterprise Linux (RHEL)]] comes with the virtualenv (venv) module built in. If you are running [[Ubuntu]] on a UMIACS-supported workstation, please contact [[HelpDesk \| UMIACS Staff]] to install venv on your machine. In the below example, <tt>env</tt> is the virtual environment name. You can substitute in any other name of your choosing.
	<pre>		<pre>
	$ python3 -m venv env		$ python3 -m venv env

Mbaney at 13:45, 23 October 2024

2024-10-23T13:45:13Z

← Older revision		Revision as of 13:45, 23 October 2024
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	====Creating the virtual environment on Python 3====		====Creating the virtual environment on Python 3====
	Python 3 on RHEL comes with the virtualenv module built in. If you are running [[Ubuntu]] on a UMIACS-supported workstation, please contact [[HelpDesk \| UMIACS Staff]] to install venv on your machine. In the below example, <tt>env</tt> is the virtual environment name. You can substitute in any other name of your choosing.		Python 3 on [[RHEL \| Red Hat Enterprise Linux (RHEL)]] comes with the virtualenv module built in. If you are running [[Ubuntu]] on a UMIACS-supported workstation, please contact [[HelpDesk \| UMIACS Staff]] to install venv on your machine. In the below example, <tt>env</tt> is the virtual environment name. You can substitute in any other name of your choosing.
	<pre>		<pre>
	$ python3 -m venv env		$ python3 -m venv env

Mbaney at 14:27, 24 May 2024

2024-05-24T14:27:20Z

← Older revision		Revision as of 14:27, 24 May 2024
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	<pre>		<pre>
	$ python3 -m venv env		$ python3 -m venv env
			</pre>

			====Creating the virtual environment on Python 2 (deprecated)====
			<pre>
			$ git clone https://github.com/pypa/virtualenv.git
			$ python virtualenv/virtualenv.py env
			New python executable in env/bin/python
			Installing setuptools.............done.
	</pre>		</pre>

Mbaney at 17:33, 6 February 2024

2024-02-06T17:33:13Z

← Older revision		Revision as of 17:33, 6 February 2024
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	====Creating the virtual environment on Python 3====		====Creating the virtual environment on Python 3====
	Python 3 on RHEL comes with the virtualenv module built in. If you are running [[Ubuntu]] on a UMIACS-supported workstation, please contact [[HelpDesk \| UMIACS Staff]] to install venv on your machine.		Python 3 on RHEL comes with the virtualenv module built in. If you are running [[Ubuntu]] on a UMIACS-supported workstation, please contact [[HelpDesk \| UMIACS Staff]] to install venv on your machine. In the below example, <tt>env</tt> is the virtual environment name. You can substitute in any other name of your choosing.
	<pre>		<pre>
	$ python3 -m venv env		$ python3 -m venv env

Mbaney at 18:28, 31 January 2024

2024-01-31T18:28:48Z

← Older revision		Revision as of 18:28, 31 January 2024
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	<pre>		<pre>
	$ python3 -m venv env		$ python3 -m venv env
	~~</pre>~~

	~~====Creating the virtual environment on Python 2 (deprecated)====~~
	~~<pre>~~
	~~$ git clone https://github.com/pypa/virtualenv.git~~
	~~$ python virtualenv/virtualenv.py env~~
	~~New python executable in env/bin/python~~
	~~Installing setuptools.............done.~~
	</pre>		</pre>

Mbaney at 18:05, 29 January 2024

2024-01-29T18:05:16Z

← Older revision		Revision as of 18:05, 29 January 2024
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	Uninstalling nose-1.3.7:		Uninstalling nose-1.3.7:
	Would remove:		Would remove:
	/nfshomes/~~liam~~/env/bin/nosetests		/nfshomes/username/env/bin/nosetests
	/nfshomes/~~liam~~/env/bin/nosetests-3.4		/nfshomes/username/env/bin/nosetests-3.4
	/nfshomes/~~liam~~/env/lib/python3.7/site-packages/nose-1.3.7.dist-info/*		/nfshomes/username/env/lib/python3.7/site-packages/nose-1.3.7.dist-info/*
	/nfshomes/~~liam~~/env/lib/python3.7/site-packages/nose/*		/nfshomes/username/env/lib/python3.7/site-packages/nose/*
	/nfshomes/~~liam~~/env/man/man1/nosetests.1		/nfshomes/username/env/man/man1/nosetests.1
	Proceed (y/n)? y		Proceed (y/n)? y
	Successfully uninstalled nose-1.3.7		Successfully uninstalled nose-1.3.7

Mbaney at 14:17, 23 February 2023

2023-02-23T14:17:58Z

← Older revision		Revision as of 14:17, 23 February 2023
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	====Creating the virtual environment on Python 3====		====Creating the virtual environment on Python 3====
	Python 3 on RHEL comes with the virtualenv module built in. If you are on [[Ubuntu]], please contact [[HelpDesk \| UMIACS Staff]] to install venv on your machine.		Python 3 on RHEL comes with the virtualenv module built in. If you are running [[Ubuntu]] on a UMIACS-supported workstation, please contact [[HelpDesk \| UMIACS Staff]] to install venv on your machine.
	<pre>		<pre>
	$ python3 -m venv env		$ python3 -m venv env

Mbaney at 16:43, 20 October 2022

2022-10-20T16:43:00Z

← Older revision		Revision as of 16:43, 20 October 2022
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	A virtual environment is an isolated working copy of Python, which allows you to work on specific projects without affecting others. It creates an environment that has its own installation directories and that does not share libraries with other virtualenv environments (and optionally doesn’t access the globally-installed libraries either).		A virtual environment is an isolated working copy of [[Python]], which allows you to work on specific projects without affecting others. It creates an environment that has its own installation directories and that does not share libraries with other virtualenv environments (and optionally doesn’t access the globally-installed libraries either).

	==Basic Usage==		==Basic Usage==
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	==Using a different Python version==		==Using a different Python version==
	To create a virtual environment that uses a version of ~~python~~ that is different than the system default, create the virtualenv with your target version of Python. This could be a Python build we provide via [[Modules]], or one you've built yourself. Virtualenv will pick up the first ~~python~~ version it finds in your $PATH, or you can direct it to a specific location with the "--python" flag.		To create a virtual environment that uses a version of Python that is different than the system default, create the virtualenv with your target version of Python. This could be a Python build we provide via [[Modules]], or one you've built yourself. Virtualenv will pick up the first Python version it finds in your $PATH, or you can direct it to a specific location with the "--python" flag.

	<pre>		<pre>

Derek: /* Activating the VirtualEnv */

2022-01-20T15:44:52Z

Activating the VirtualEnv

← Older revision		Revision as of 15:44, 20 January 2022
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	{{Note\|<b>Note:</b> tcsh/csh shell users should run <code>source env/bin/activate.csh</code> instead.}}		{{Note\|<b>Note:</b> tcsh/csh shell users should run <code>source env/bin/activate.csh</code> instead.}}

	We also suggest the first thing you do is to ensure you have an updated version of pip installed in your environment. Make sure you have sourced your environment, and then run the following:		We also suggest the first thing you do is to ensure you have an updated version of pip, setuptools and wheel installed in your environment. Make sure you have sourced your environment, and then run the following:

	<pre>		<pre>
	$ pip install --upgrade pip		$ pip install --upgrade pip setuptools wheel
	</pre>		</pre>

Derek: /* Creating the virtual environment on Python 3 */

2021-04-07T12:38:19Z

Creating the virtual environment on Python 3

← Older revision		Revision as of 12:38, 7 April 2021
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	====Creating the virtual environment on Python 3====		====Creating the virtual environment on Python 3====
	Python 3 on ~~[[RHEL7]] and [[RHEL8]]~~ comes with the virtualenv module built in. If you are on [[Ubuntu]], please contact [[HelpDesk \| UMIACS Staff]] to install venv on your machine.		Python 3 on RHEL comes with the virtualenv module built in. If you are on [[Ubuntu]], please contact [[HelpDesk \| UMIACS Staff]] to install venv on your machine.
	<pre>		<pre>
	$ python3 -m venv env		$ python3 -m venv env