pip 和 conda 在哪里保存已安装软件包的列表，以便他们知道谁安装了什么？

Question

I did some pip install in my conda environment, and it seems that both conda and pip follow the python convention, by installing packages into the site-packages folder.

When I use pip list and conda list , it seems they did a nice book keeping of who installed which packages. Question is, where are those two installation lists stored, on Linux?

Answer 1

In case of pip list , the pkg_resources library is used to access resource files for Python Libraries.

For this, a Working Set access the active distributions. From the docs, a working set

represents the distributions that are currently active on sys.path.

Thus, when calling an instance of WorkingSet , by default it will search for modules located on sys.path .

For example, when I run sys.path

['/opt/conda/lib/python37.zip',
 '/opt/conda/lib/python3.7',
 '/opt/conda/lib/python3.7/lib-dynload',
 '',
 '/opt/conda/lib/python3.7/site-packages',
 '/opt/conda/lib/python3.7/site-packages/IPython/extensions'
]

These are the paths that will be used to search for installed packages. An example follows

import pkg_resources

# Define working set
working_set = pkg_resources.working_set

# Package, version and location 
[d for d in working_set]
>>>
[zipp 3.1.0 (/opt/conda/lib/python3.7/site-packages),
 zict 2.0.0 (/opt/conda/lib/python3.7/site-packages),
...,
attrs 19.3.0 (/opt/conda/lib/python3.7/site-packages),
 async-generator 1.10 (/opt/conda/lib/python3.7/site-packages),
 alembic 1.4.2 (/opt/conda/lib/python3.7/site-packages)]