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deptlab:python_virtual_env [2021/10/21 21:34] – [Using Virtual Environments] localadmindeptlab:python_virtual_env [2024/09/17 17:18] (current) – [Using Virtual Environments] localadmin
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 Create a new virtual environment inside the directory: Create a new virtual environment inside the directory:
  
-python3 -m venv project_1_env+''python3 -m venv project_1_env''
  
 **Note:** By default, this will not include any of your existing site packages. **Note:** By default, this will not include any of your existing site packages.
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 Notice how your prompt is now prefixed with the name of your environment (''project_1_env'', in this case). This is the indicator that ''project_1_env'' is currently active, which means <color #ed1c24>the python executable will only use this environment’s packages and settings.</color> Notice how your prompt is now prefixed with the name of your environment (''project_1_env'', in this case). This is the indicator that ''project_1_env'' is currently active, which means <color #ed1c24>the python executable will only use this environment’s packages and settings.</color>
 +
 +Now you can use pip to install packages (large packages may take a while to install).  
  
 To go back to the “system” context, execute a deactivate: To go back to the “system” context, execute a deactivate:
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 Now your shell session is back to normal, and the python command refers to the global Python install. Remember to do this whenever you’re done using a specific virtual environment. Now your shell session is back to normal, and the python command refers to the global Python install. Remember to do this whenever you’re done using a specific virtual environment.
  
-===== Using a Python3 IDE with Virtual Environments =====+Using Virtual Environment makes it east to reset your Python environment if you need to use a different set of packages.  Just delete the old environment and create a new one.
  
-==== Spyder ====+**Be sure to cleanup/delete unused temp files and environments when done using them.** 
 + 
 +===== Tips for Using a Python3 IDE with Virtual Environments ===== 
 + 
 +==== Using Spyder in the 244 Lab ==== 
 +  - Activate (start) your virtual environment. 
 +  - Run spyder  
 +  - Go to Tools --> preferences --> python Interpreter and select the python file from the virtual env you want to link to Spyder ex : /home/you/envs/your_env/bin/python 
 + 
 +==== Preferred Method on Research Computers: Spyder Method 1 (Use with tensorflow) ====
 To use Spyder.   To use Spyder.  
   - Activate (start) your virtual environment.   - Activate (start) your virtual environment.
 +  - Install the needed packages with pip
   - Install Spyder into your environment using pip install spyder.   - Install Spyder into your environment using pip install spyder.
   - Then start spyder from the environment command line with the command spyder.   - Then start spyder from the environment command line with the command spyder.
  
 +==== Spyder Method 2 (Doesn't work well with tensorflow) ====
 +
 +  - Activate (start) your virtual environment.
 +  - Run spyder from the environment (after source activate)
 +  - Go to Tools --> preferences --> python Interpreter and select the python file from the env you want to link to spyder ex : /home/you/envs/your_env/bin/python
 +
 +
 + [[https://realpython.com/python-virtual-environments-a-primer/|See... Using Python Virtual Environments]] for more detail
deptlab/python_virtual_env.1634852049.txt.gz · Last modified: by localadmin