How to install and run python

How to install and run python?

1. Install Python 3.7

Currently, there are two versions of Python, one is version 2.x and the other is version 3.x. These two versions are incompatible. . Due to the increasing popularity of version 3.x, our tutorials will be based on the latest Python 3.7 version. Please make sure that the Python version installed on your computer is the latest 3.7.x.

Recommended: "python Tutorial"

Download address: https://www.python.org/downloads/release/python-370/

Download version: For 64-bit computers, select Windows x86-64 executable installer

After downloading and installing, remember to check and add to the path, and then click Next directly

2. Run Python

After the installation is successful, open the command prompt window and type python. Two situations will appear:

1. Enter python , display the corresponding version information. The installation is successful.

#2. Enter python, and the prompt is not an internal or external command. Explanation The installation path failed.

Installation path: C:\Users\Administrator\AppData\Local\Programs\Python\Python37

You need to add the installation path to the system environment variable path middle.

3. Use the notepad text editor

Write a program on the interactive command line of Python. The advantage is that you can get the results in one go, but the disadvantage is that there is no way Save, you have to type it again next time you want to run it.

So, when actually developing, we always use a text editor to write code. After writing, save it as a file, so that the program can be run repeatedly.

Now, we will write out the last 'hello, world' program using the notepad text editor and save it.

The example is as follows:

Save the file in notepad in the c:\py directory, and the file name is 1.py

Then cd to the specified directory on the command line and enter python 1.py.

In this way, you can edit the code and run the results at the same time.

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