E modulenotfounderror: no module named 'psychopg2' (resolved)

Hint: make sure your test modules/packages have valid Python names.

Traceback:

d:\software\python3.8\lib\importlib\__init__.py:127: in import_module

    return _bootstrap._gcd_import(name[level:], package, level)

test_case\test_case.py:6: in <module>

    from common.connectpostgresql import Getresult

common\connectpostgresql.py:1: in <module>

    import psycopg2

E   ModuleNotFoundError: No module named 'psycopg2'

I used a virtual environment , The virtual environment is equipped with psycopg2, I run the import alone psycopg2 The file of the module can run successfully , But an error is reported in the called file . Later on The local environment It is also installed in the psycopg2, Run again successfully . Is there something wrong with the virtual environment I created ？ Welcome to point .