Some magic about PyCharm:

Type a.if in a .py file and press tab, the final result would be:

if a:

a.ifn:

if a is None:

a.ifnn:

if a is not None:

app.run().main

if __name__ == '__main__':
     app.run()

These are called postfix completion and helps programmers to not go back and forth when coding. You can see the complete list in PyCharm setting.

#pycharm #trick #postfix #auto_completion #postfix_completion