I am learning Python programming language. Currently
I am experimenting  i-o files. I imported sys module and
 in sys.path list I saw two kinds of paths:

/data/data/org.qpython.qpy3....
/storage/sdcard0/qpthon...

The former path does not exist physically on my device
(Tablet), although I can create/read  files using this
path through python.
I want to know  about these paths.
What are they called?
What are they for? etc.
The first path, /data/data/org.qpython.qpy3, this is where the actual QPython app is stored on your device. I don't believe you can access this path without having root access.
The second path, /storage/sdcard0/qpthon, this is where QPython saves files by default. It uses this location because it can be easily accessed with normal user privileges.
Directory path which does not physically exist on my device