Activating or deactivating a virtual environment is done by manipulating the list of paths contained in PATH. The next concept is that a virtual environment in Python is just a directory that contains the desired Python version and the libraries needed for the project.

If no file is found, then an error message is displayed. The first executable file named python that is found stops the search and is executed with the parameter -version. The search is stopped when the first match is found and the program runs.įor example, if PATH contains $HOME/.local/bin:/usr/local/bin:/usr/bin and you run the command python -version, then the shell will look for an executable named python in $HOME/.local/bin first, then in /usr/local/bin and last in /usr/bin. The search is done in a list of directories registered in the environment variable called PATH. Unless you specify the full path, a command must be searched by the operating system to run. poetry manages virtual environments and project dependencies within those virtual environments.pyenv manages different versions of Python on the same machine.There are several options, but let's focus on two: In the case of Python projects, we will need tools that manage Python versions, virtual environments, and project dependencies. So that one project does not interfere with another, they must be isolated somehow. Software developers always have several projects on their computers using different languages, versions of those languages, libraries, and tools.

Py env