When you play with environment variables (add/modify/remove variables), a good practice is to restore the previous state at function completion. You may need something like the modified_environ context manager describe in this question to restore the environment variables. Classic usage: with modified_environ(DEBUSSY="1"): call_my_function()

If Python was installed with another program, such as ArcGIS 10.1 in my case, then you also must include any extra folders that path to the python.exe in your Environment Variables. So my Environment Variables looks like this: System variables > Path > add ;C:\Python27\ArcGIS10.1

Jan 29, 2018 · Select PATH in the System variables section; Click Edit; Add Python's path to the end of the list (the paths are separated by semicolons). For example: C:\Windows;C:\Windows\System32;C:\Python27 For Windows XP: Open System Properties (Type it in the start menu, or use the keyboard shortcut Win+Pause) Switch to …

Oct 22, 2014 · One quick solution to those who are still struggling with environment variable setup issue. Just Uninstall the existing python version and reinstall it make sure to enable checkbox as "Add Python 3.10 to PATH to the environment variable.

Sep 13, 2010 · Maybe a little late, but this is how you add the path to the Windows Environment Variables. Go to the Environment Variables tab, you do this by pressing Windows key + Pausa inter. Go to Advanced System Settings. Click on Environment Variables. On the lower window search for the 'Path' value. Select it. Click on Edit

Feb 5, 2011 · You can access the environment variables using. import os print os.environ Try to see the content of the PYTHONPATH or PYTHONHOME environment variables. Maybe this will be helpful for your second question.

Mar 4, 2012 · sets or updates an environment variable on activation. restores the previous value of the environment variable on deactivation. SOLUTION: Create the MY_ENV environment. python -m venv MY_ENV Open the activate script in any text editor (e.g vim). vim MY_ENV/bin/activate Update the body of the deactivate function.

Jun 12, 2014 · So without setting Python's directory in PATH >you can simply run py to start Python; if 2.x is installed use py -3 since >Python 2 is the default. – eryksun . I tried to use py instead of python and it worked. Meaning: python setup.py build -> does NOT work. py setup.py build -> does work. Hope it helps

Here is the solution: In anaconda (as well as in other implementations), set the path environment variable to the directory where 'python.exe' is installed. As a default, the python.exe file in anaconda is in: c:\.....\anaconda After you do that, the Python command works, in my case, yielding the following: python Python 3.4.3 |Anaconda 2.2.0.

Jan 20, 2016 · PATH is an environment variable in Windows. It basically tells the commandline what folders to look in when attempting to find a file. If you didn't add Python to PATH then you would call it from the commandline like this: C:/Python27/Python some_python_script.py Whereas if you add it to PATH, you can do this: python some_python_script.py