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
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