Walkthrough of setting Python environment variables in windows

Below for you to share an example of setting up Python environment variables in Windows to explain, with a good reference value, I hope to be helpful to everyone. Come and see it together.

Setting environment variables in Windows

To add a Python directory to an environment variable:

In the Command Prompt box (cmd): Enter

path=%path%; C:\Python

Press "Enter".

Note: C:\Python is the installation directory for Python.

You can also set it in the following ways:

• Right-click on "Computer" and click on "Properties"

• Then click on "Advanced system Settings"

• Select "Path" under the "System Variables" window and double click!

• Then in the "path" line, add the Python installation path (my D:\Python32), so later, add the path. PS: Remember, the path is separated directly by a semicolon ";"

• After the final setup is successful, on the cmd command line, enter the command "Python" and you can have the relevant display.

Python Environment variables

Here are a few important environment variables that apply to Python:

Variable name Description

PYTHONPATH PYTHONPATH is the Python search path, and the default import module will be searched from PYTHONPATH.

Pythonstartup python starts, look for the PYTHONSTARTUP environment variable, and then execute the code in the file specified by this variable.

Pythoncaseok joins the PYTHONCASEOK environment variable, it makes Python import the module is not case-sensitive.

Pythonhome another module search path. It is typically embedded in the Pythonstartup or Pythonpath directory, making it easier to switch between two module libraries.

Run Python

There are three ways to run Python:

1. Interactive interpreter:

You can enter Python from a command-line window and start writing Python code in the interactive interpreter.

You can do python coding in unix,dos or any other system that provides a command line or shell.

$ python # Unix/linux

Or

C:>python # Windows/dos

The following are the Python command-line parameters:

Option description

-D displays debug information at parse time

-O Generate Optimization code (. pyo file)

-S does not introduce a location to find Python paths when booting

-V Output Python version number

-X is obsolete based on the built-in exception (for strings only) since version 1.6.

-C CMD executes the Python script and runs the result as a CMD string.

File executes the Python script in the given Python file.

2. Command line script

In your application, you can execute a python script on the command line by introducing an interpreter, as follows:

$ python script.py # Unix/linux

Or

C:>python script.py # Windows/dos

Note: when executing a script, check to see if the script has executable permissions.