BUG: ModuleNotFoundError: No module named 'pandas' (Problem with Python3.9)

[Nafees-060]

Initially, I ran experiments on python3, which supports Pandas perfectly. Since our lab recently upgraded the server to an RTX 3000 series GPU, it supports Python 3.9, not previous versions. For that, when I ran the tests in python3.9 (python3.9 code file.py), the following error occurred:
ModuleNotFoundError: No module named 'pandas'

Then I ran 'pip install pandas' and found that the requirements had already been met; here's further information:

Defaulting to user installation because normal site-packages is not writeable
Requirement already satisfied: pandas in ./.local/lib/python3.6/site-packages (1.1.5)
Requirement already satisfied: pytz>=2017.2 in ./.local/lib/python3.6/site-packages (from pandas) (2021.1)
Requirement already satisfied: python-dateutil>=2.7.3 in ./.local/lib/python3.6/site-packages (from pandas) (2.8.2)
Requirement already satisfied: numpy>=1.15.4 in ./.local/lib/python3.6/site-packages (from pandas) (1.19.5)
Requirement already satisfied: six>=1.5 in ./.local/lib/python3.6/site-packages (from python-dateutil>=2.7.3->pandas) (1.15.0)

But when I ran the file again, I received the same issue: ModuleNotFoundError: No module named 'pandas'

How can we install solve this issue?

[twoertwein]

You are using pip with python 3.6:

Requirement already satisfied: pandas in ./.local/lib/python3.6/site-packages (1.1.5)

You probably want to use: python3.9 -m pip install pandas

[MarcoGorelli]

agreed - closing as it looks like that's the issue (rather than anything in pandas)