Summary

This week I had the idea of creating a cli tool to check the size of the packages used in a python project. After checking available tools to facilitate the work, I noticed that uv tree could be used to get the dependency tree and then look up the sizes of the packages on the venv. As it was a "simple" wrapper around uv, I thought about it and decided to ask for the feature here.

Example

Note that sizes are not completely accurate:

~/test/ > uv tree --sizes
81MB    |   test v0.1.0  
39MB    |   ├── numpy v2.2.3
42MB    |   └── pandas v2.2.3 (group: dev)
(**)    |       ├── numpy v2.2.3
0.5MB   |       ├── python-dateutil v2.9.0.post0
8KB     |       │   └── six v1.17.0
1.5MB   |       ├── pytz v2025.1
1.6MB   |       └── tzdata v2025.1
(**) Package size already displayed

Benefits

• In order to share a distribution (e.g. with pyinstaller), this helps us to get an idea of how big the executable will be.
• Check if the dependency you are using really fits the project. There may be a lighter package that does what you need.