Detailed tutorial on installing Python3 and using pip

Detailed tutorial for Python3 installation pip, specific code examples are required

Introduction:
When using Python3 for development, we often need to use various third parties Library to assist development, and pip is Python's package management tool, which can help us easily install, upgrade and manage various Python packages. In this article, we will introduce you to a detailed tutorial on installing pip for Python 3, and provide specific code examples to facilitate you to better use Python for development.

Step 1: Check the Python version
Before starting to install pip, we first need to check our Python version. Open a command line terminal and enter the following command:

python --version

If the Python version displayed is 3.x.x, it means that we have already installed Python3 and there is no need to upgrade the Python version. If the displayed Python version is 2.x.x, it means that we need to upgrade our Python version to 3.x.x before installing pip.

Step 2: Install Python3
If our Python version is 2.x.x, we need to upgrade to the Python3 version first. We can download the latest version of Python3 installation package from the Python official website (https://www.python.org/).

Select the corresponding installation package according to our operating system, and download and install it. During the installation process, we need to pay attention to checking the "Add Python to PATH" option so that we can use the python command directly in the command line terminal.

After the installation is completed, we can enter the following command again to check the version and confirm that Python3 has been successfully installed:

python --version

Step 3: Install pip
After installing Python3, we can pass Command line terminal to install pip. Open the command line terminal and enter the following command:

python -m ensurepip --default-pip

After executing this command, pip will automatically be downloaded and installed into our Python3 environment. We can execute the following command to check whether pip is installed successfully:

pip --version

If the pip version number is displayed, it means that pip has been installed successfully.

Step 4: Configure environment variables
In order to facilitate us to use the pip command directly in any directory, we need to add the directory where pip is located to the system's environment variables.

First, find the Scripts directory in the Python3 installation directory, for example:

C:Python37Scripts

Then, add the path to the directory to the system's PATH environment variable. The specific steps are as follows:

1. Right-click "This Computer" and select "Properties";
2. In the "System" window, click "Advanced System Settings";
3. In the "System Properties" window, click the "Environment Variables" button;
4. In the "Environment Variables" window, find the "Path" variable in the "System Variables" list and double-click it;
5. In the "Edit Environment Variables" window, click the "New" button;
6. In the pop-up dialog box, enter the path to the Scripts directory and click the "OK" button;
7. Click the "OK" button to close all windows.

After completing the above operations, we reopen a command line terminal and enter the following command to test:

pip --version

If the version number of pip can be displayed, it means we have successfully configured it environment variables.

Summary:
Through the above steps, we successfully installed pip in Python3 and configured environment variables. Now, we can directly use the pip command in any directory to install, upgrade and manage third-party libraries.

I hope this article can help everyone and make it more convenient for everyone to use Python for development. If you encounter any problems during the installation process, please feel free to ask your questions. I wish everyone will go further and further on the road of Python development!

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