Description

It is possible to combine multiple source blocks into one session through org babels session feature.

Example

Set the following header properties for a header or global

#+PROPERTY: header-args:python :noweb yes :session *python* :results output

Literate programming

x = 1337

y = 1 + x
print(y)

5

Last but not least use org-babel-execute-buffer (C-c C-v b) to execute all source blocks at once.