IronPython.Runtime.Exceptions.ImportException: 'No module named 'pygame''

Prerequisites

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Description

I downloaded the pygame package using the pip virtual environment, and copied the entire Lib folder generated by the pip virtual environment to the Debug folder and referenced it in the program. However, why would an error be reported?

Steps to Reproduce

1. Install Ironpython 3.4 in nuget package manager
2. Run "python - m venv env" to create a python virtual environment
3. Run "env Scripts activate. bat" to enable the Python virtual environment
4. Run "pip install pygame" to download the latest package for pygame
5. Copy the Lib folder under the env folder created by pip to the project output path

Versions

IronPython 3.4
Python 3.9 (64-bit)

No source file or test is named. Reproduce the IronPython 3.4 NuGet setup with a Python 3.9 64-bit virtual environment, pygame, and the copied Lib folder; use the resulting import error to determine the supported package-loading behavior and define a reproducible fix or documentation update.