How to set environment variables in PyCharm?

You can set environmental variables in Pycharm's run configurations menu.

1. Open the Run Configuration selector in the top-right and cick Edit Configurations...

   

2. Find Environmental variables and click ...

   

3. Add or change variables, then click OK

   

You can access your environmental variables with os.environ

import osprint(os.environ['SOME_VAR'])

I was able to figure out this using a PyCharm plugin called EnvFile. This plugin, basically allows setting environment variables to run configurations from one or multiple files.

The installation is pretty simple:

Preferences > Plugins > Browse repositories... > Search for "Env File" > Install Plugin.

Then, I created a file, in my project root, called environment.env which contains:

DATABASE_URL=postgres://127.0.0.1:5432/my_db_nameDEBUG=1

Then I went to Run->Edit Configurations, and I followed the steps in the next image:

In 3, I chose the file environment.env, and then I could just click the play button in PyCharm, and everything worked like a charm.

This functionality has been added to the IDE now (working Pycharm 2018.3)

Just click the EnvFile tab in the run configuration, click Enable EnvFile and click the + icon to add an env file

Update: Essentially the same as the answer by @imguelvargasf but the the plugin was enabled by default for me.