How can I see all installed Python modules in Jupyter Lab (like pip freeze) with Python 3.7 or newer?

Question

I'm looking for a way to get a list of all installed/importable python modules from a within a Jupyterlab notebook.

From the command line, I can get the list by running

py -3 -m pip freeze

(or)

pip freeze

In the Jupyterlab console, running pip freeze returns

The following command must be run outside of the IPython shell:

    $ pip freeze

The Python package manager (pip) can only be used from outside of IPython.
Please reissue the `pip` command in a separate terminal or command prompt.

See the Python documentation for more information on how to install packages:

https://docs.python.org/3/installing/

For older versions of pip, it was possible to import pip and get a list from within a notebook.

The command was

help('modules')

This now gives a warning and returns nothing.

c:\python37\lib\site-packages\IPython\kernel\__init__.py:13: ShimWarning: The `IPython.kernel` package has been deprecated since IPython 4.0.You should import from ipykernel or jupyter_client instead.
  "You should import from ipykernel or jupyter_client instead.", ShimWarning)

10 year old stackoverflow solutions like How can I get a list of locally installed Python modules? also no longer work.

Is there a proper way of doing this (without using a subprocess hack or running pip as an external program like "!pip")

Answer 1

您可以对结果运行以下代码段。

!pip list

Answer 2

you can also try

!pip freeze

in your jupyter notebook. Hope it helps you.

Answer 3

import pip._internal.operations.freeze
_ = pip._internal.operations.freeze.get_installed_distributions()
print(sorted(["%s==%s" % (i.key, i.version) for i in _])[:10])
['absl-py==0.7.1',
 'aiml==0.9.2',
 'aio-utils==0.0.1',
 'aiocache==0.10.1',
 'aiocontextvars==0.2.2',
 'aiocqhttp==0.6.7',
 'aiodns==2.0.0',
 'aiofiles==0.4.0',
 'aiohttp-proxy==0.1.1',
 'aiohttp==3.6.2']

This works in Win10 with Python 3.6 & 3.7 (ipython, pip. version : '20.0.1') at least. I took a look at the source code in Lib\\site-packages\\pip.

Answer 4

Try this :

help("modules")

....