[SOLVED] How to show the dependency problem in the existing python environment

Issue

I installed the python packages on Ubuntu by the following command:

# pip install --upgrade -r r.txt

Here is the console output:

Installing collected packages: protobuf

ERROR: pip's legacy dependency resolver does not consider dependency conflicts when selecting packages. This behaviour is the source of the following dependency conflicts.
apache-beam 2.53.0 requires packaging>=22.0, but you'll have packaging 20.9 which is incompatible.
ortools 9.8.3296 requires absl-py>=2.0.0, but you'll have absl-py 1.4.0 which is incompatible.
ortools 9.8.3296 requires pandas>=2.0.0, but you'll have pandas 1.5.3 which is incompatible.

Successfully installed protobuf-4.25.1
#

After closing the console, I want to reopen the terminal to check what dependency problem is in my system.

Here is the expected output:

# pip what_command_to_show_the_problem

ERROR: pip's legacy dependency resolver does not consider dependency conflicts when selecting packages. This behaviour is the source of the following dependency conflicts.
apache-beam 2.53.0 requires packaging>=22.0, but you'll have packaging 20.9 which is incompatible.
ortools 9.8.3296 requires absl-py>=2.0.0, but you'll have absl-py 1.4.0 which is incompatible.
ortools 9.8.3296 requires pandas>=2.0.0, but you'll have pandas 1.5.3 which is incompatible.

What command can be used to show the same dependency problem existed in the system?

Solution

The command is pip check

See the docs:

Verify installed packages have compatible dependencies.

If you want to check a virtual environment don't forget to activate it or run its python/pip instead of the base ones:

path/to/venv/bin/python -m pip check

Answered By - phd

Answer Checked By - Timothy Miller (WPSolving Admin)