ikuchin/find_common_users_in_csv

Test task to find common user_ids in HUGE csv files

find_common_users_in_csv

Task is to write a function find_users in file solution.py that should receive file names, at least 2. And should return list of user_id's that are present in both files. List should have unique values.

Goal is to use as less memory as possible. And have a decent runtime.

It's acceptable to use non common data structures.

When you you can run test by running next command

python -m unittest discover

Best results using build in python data structures:

• 1KiB file - runtime:0.1 sec, memory:0.0MB
• 1MiB file - runtime:0.2 sec, memory:0.2MB
• 1GiB file - runtime:1,0 min, memory:1.4GB !!!