Installation of Python

Python Installation on Windows

The installation requires downloading the official Python .exe installer and running it on your system. The sections below will explain several options and details during the installation process.

Step 1: Select Python Version

Deciding on a version depends on what you want to do in Python. The two major versions are Python 2 and Python 3. Choosing one over the other might be better depending on your project details. If there are no constraints, choose whichever one you prefer.

We recommend Python 3, as Python 2 reached its end of life in 2020. Download Python 2 only if you work with legacy scripts and older projects. Also, choose a stable release over the newest since the newest release may have bugs and issues.

Step 2: Download Python Executable Installer

Start by downloading the Python executable installer for Windows:

1. Open a web browser and navigate to the Downloads for Windows section of the official Python website.
2. Locate the desired Python version.

3. Click the link to download the file. Choose either the Windows 32-bit or 64-bitinstaller.

The download is approximately 25MB.

Step 3: Run Executable Installer

The steps below guide you through the installation process:

1. Run the downloaded Python Installer.
2. The installation window shows two checkboxes:

• Admin privileges. The parameter controls whether to install Python for the current or all system users. This option allows you to change the installation folder for Python.
• Add Python to PATH. The second option places the executable in the PATH variable after installation. You can also add Python to the PATH environment variable manually later.

For the most straightforward installation, we recommend ticking both checkboxes.

3. Select the Install Nowoption for the recommended installation (in that case, skip the next two steps).

To adjust the default installation options, choose Customize installation instead and proceed to the following step.

The default installation installs Python to C:\Users\[user]\AppData\Local\Programs\Python\Python[version] for the current user. It includes IDLE (the default Python editor), the PIP package manager, and additional documentation. The installer also creates necessary shortcuts and file associations.

Customizing the installation allows changing these installation options and parameters.

4. Choose the optional installation features. Python works without these features, but adding them improves the program’s usability.

Click Next to proceed to the Advanced Options screen.

5. The second part of customizing the installation includes advanced options.

Choose whether to install Python for all users. The option changes the install location to C:\Program Files\Python[version]. If selecting the location manually, a common choice is C:\Python[version] because it avoids spaces in the path, and all users can access it. Due to administrative rights, both paths may cause issues during package installation.

Other advanced options include creating shortcuts, file associations, and adding Python to PATH.

After picking the appropriate options, click Install to start the installation.

6. Select whether to disable the path length limit. Choosing this option will allow Python to bypass the 260-character MAX_PATH limit.

The option will not affect any other system settings, and disabling it resolves potential name-length issues. We recommend selecting the option and closing the setup.

Step 4: Add Python to Path (Optional)

If the Python installer does not include the Add Python to PATH checkbox or you have not selected that option, continue in this step. Otherwise, skip to the next step.

Adding the Python path to the PATH variable alleviates the need to use the full path to access the Python program in the command line. It instructs Windows to review all the folders added to the PATH environment variable and to look for the python.exe program in those folders.

To add Python to PATH, do the following:

1. In the Start menu, search for Environment Variables and press Enter.

2. Click Environment Variables to open the overview screen.

3. Double-click Pathon the list to edit it.

Alternatively, select the variable and click the Edit button.

4. Double-click the first empty field and paste the Python installation folder path.

Alternatively, click the New button instead and paste the path.

5. Click OK to save the changes. If the command prompt is open, restart it for the following step.

Step 5: Verify Python Was Installed on Windows

The first way to verify that Python was installed successfully is through the command line. Open the command prompt and run the following command:

python –version

The output shows the installed Python version.

The second way is to use the GUI to verify the Python installation. Follow the steps below to run the Python interpreter or IDLE:

1. Navigate to the directory where Python was installed on the system.
2. Double-click python.exe(the Python interpreter) or IDLE.
3. The interpreter opens the command prompt and shows the following window:

Running IDLE opens Python’s built-in IDE: