When you see'python' is not recognized as an internal or external commandthis error, it means Windows cannot find the Python executable in the PATH environment variable.

By adding the correct directory to PATH, you can run Python and pip in any terminal without full paths.

Before you start, make sure you have the following:

For detailed guidance on PATH, installer options, and Python Launcher, see the "Using Python on Windows" chapter in the official Python documentation (docs.python.org).

Method 1: Use the official installer to add PATH (recommended)

The installer from python.org can set PATH for you directly, avoiding manual entry errors, and it also adds the Scripts folder needed for pip.

The same installer can also be used with theModifyoption to add PATH to an existing installation without reinstalling.

Steps

Installation screen — be sure to check the PATH option:

If already installed, choose the Modify option:

Verify whether the installation succeeded:

python --version
pip --version
where python
where pip

If you already installed Python but did not check the PATH option at the time, simply rerun the installer, chooseModify, then check "Add python.exe to PATH", and reopen the terminal after the installation finishes.

Method 2: Manually add Python to PATH (user level)

If you did not enable the PATH option when installing Python, or you need to adjust only the current user's environment variables without affecting system variables, you can edit PATH manually.

Steps

Step 1 — Open System Properties via sysdm.cpl:

Step 2 — Environment Variables window:

Step 3 — Edit the Path variable:

Step 4 — Create a new Python installation path entry:

Step 5 — Add the Scripts directory:

Step 6 — Move entries up so they are found first:

Step 7 — Confirm and save all dialog boxes:

Step 9 — Verify the result:

python --version
pip --version
where python
where pip

Notes and common pitfalls

Method 3: Fix "App execution aliases" for Microsoft Store installations

If you installed Python from the Microsoft Store, it relies on "App execution aliases" and the WindowsApps directory to resolve the python command, rather than traditional PATH editing.

Steps

App execution alias settings entry:

python.exe and python3.exe alias toggles:

If enteringpythonopens Microsoft Store instead of running Python, the alias is pointing to the Store. Turn off the alias for the corresponding version, install the python.org version instead, or use the Python Launcher (py command) described below.

Method 4: Use Python Launcher instead of editing PATH

Python Launcher（py.exe) is installed with python.org builds and can automatically locate installed Python versions based on labels, completely avoiding PATH conflicts.

This is the officially recommended multi-version management solution — you can pin a specific Python version for each project without modifying PATH.

Steps

Check the Launcher version:

py --version

Explicitly run the desired Python version:

py -3
py -3.11
py -3.10 -m pip --version

Use the Launcher to create and use virtual environments:

# 使用指定版本创建虚拟环境
py -3.11 -m venv venv

# 激活虚拟环境
venv\Scripts\activate

# 在虚拟环境中确认 Python 版本
python --version

Additional notes

When using the py Launcher, you can completely skip manual PATH editing. The Launcher automatically discovers all installed Python versions and lets you choose as needed — this is especially convenient for developers who need both Python 3.10 and 3.12.

Quick verification and troubleshooting

Confirm which executable is running

where python
where python3
where py

Verify pip and Scripts

pip --version
where pip

Common troubleshooting

Summary

Once PATH is set correctly—or you start using Python Launcher—you can run Python and pip from anywhere without typing the full path.

For multi-version environments, it is strongly recommended to use Python Launcher to precisely select versions, combined with virtual environments to maintain dependency isolation for each project.