Join Two fields during Import

Hello Team, I am importing a CSV file from the admin panel, during import I Want to Create a Unique ID by combing other three to four fields and storing it into the id column how to combine columns during import of CSV or excel Thanks and Regards -- You received this message because you

ImproperlyConfigured:

Watching for file changes with StatReloader Exception in thread django-main-thread: Traceback (most recent call last): File "/home/yogesh/mydjango/djangoenv/lib/python3.6/site-packages/django/db/backends/postgresql/base.py", line 25, in import psycopg2 as Database ModuleNotFoundError: No