to get a list of pip packages that were installed

[snippsat]

could you do pip_lst.append(line.split(None,1)[0]) to get a simpler list?

Like this pip_lst.append(line.split()[0])
But when i think about should not use pip list in poetry,as get stuff that not need as pytest modules.
Like this.

poetry export --without-hashes --format=requirements.txt > requirements.txt

requirements.txt

numpy==1.23.0; python_version >= "3.10"
pandas==1.4.3; python_version >= "3.8"
python-dateutil==2.8.2; python_version >= "3.8" and python_full_version < "3.0.0" or python_full_version >= "3.3.0" and python_version >= "3.8"
pytz==2022.1; python_version >= "3.8"
six==1.16.0; python_version >= "3.8" and python_full_version < "3.0.0" or python_full_version >= "3.3.0" and python_version >= "3.8"

Then if need even simpler list don't known why this in needed all,parse like this.

poetry_lst = []
with open('requirements.txt') as f:
    for line in f:
        line = line.split('==')
        poetry_lst.append(line[0])

print(poetry_lst)

Output:
['numpy', 'pandas', 'python-dateutil', 'pytz', 'six']

So remember this is the modules Pandas need to run,as started with just a environment for Pandas poetry add pandas.