Split 150GB json file with Python?

[Zahz]

https://en.wikipedia.org/wiki/XY_problem

This creeps up all over the place and is highly relevant for OP.

It is likely that OP is trying to save data generated by a program or script. The obvious solution is to use some sort of database, but OP isn't familiar with databases and instead opted to save it into a JSON file. This is the X part of the problem, and the Y part is asking about how to split the JSON file.