How to add environment variables in python

1. Prepare the installation package

1) Download the python operating environment from the official python website (https://www.python.org/downloads/) , currently relatively stable is python-3.5.2

2) Download the latest version of the IDE from the pycharm official website (http://www.jetbrains.com/pycharm/download/#section=windows), which is provided by the official website There are three versions of mac, windows and linux. I downloaded pycharm-community-2016.2.3.exe

3) and downloaded the latest version of the database from the postgresql official website (https://www.postgresql.org /download/windows/ After opening the page, click Download the installer to enter the download page, then select the version and operating system, and then click download), I downloaded postgresql-9.6.5-1-windows-x64.exe

2. Install software

1) Install the python operating environment

Double-click python-3.5.2.exe

## Generally use the automatic It is better to define the installation, otherwise the automatic installation will install the environment into the personal directory, which is sometimes very troublesome to find. In addition, mark the check mark in front of the second red box, otherwise you need to manually add the python installation path to the path of the Windows environment variable.

Manually modify the installation path here, you can install it to the C drive or the D drive

Complete the installation

Then we open CMD and enter python in it, and then we can directly enter the encoding

We can enter print('hello world!') Let’s test python operation, as shown below

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