How do I check if any of my Python dependencies have an update available?

I am working in a project where we've pinned all our depdencies. Eg:

pandas == 1.4.3
streamlit == 1.11.1
pendulum == 2.1.2
pyodbc == 4.0.34
...

It'd be good to write a function that will quickly check what is the latest version of each package in PyPi.

Eg:

def check_for_out_of_date_dependencies(pyproject_toml_filepath):
   ...

check_for_out_of_date_dependenceies()
>>> "You have pandas '1.4.3' but '1.4.4' is available"
>>> ...

Any ideas on how to do this?