I have also noticed that the dependencies can't be resolved even though it mentions in the requirement.txt file

The generated sources are kept in the Pants cache and are "materialized" into the sandbox used to execute your Python code when you invoke pants.

@fast-nail-55400 Thanks for your response. In the folder

~/.cache/pants

I don't have the folder

pants_dev_deps

. Instead that /home/acme/.cache/pants ❯ ls lmdb_store named_caches Am I doing something wrong?

Are you familiar with the Pants "resolve" feature? (If you aren't using multiple resolves and just one set of requirements, then the name of the default Python resolve is

python-default

)

Dear @fast-nail-55400, Thank you so much for your help. I have done what you have described above. My pants.toml file looks as follow: [GLOBAL] pants_version = "2.22.0" backend_packages = [ "pants.backend.python", "pants.backend.python.lint.pylint", "pants.backend.codegen.protobuf.python", "pants.backend.codegen.protobuf.lint.buf", ] [python] interpreter_constraints = [">=3.11,<3.13"] enable_resolves = true [python-protobuf] mypy_plugin = true [export] py_generated_sources_in_resolve = ['python-default'] Running

pants export --resolve=python-default

it generates:

pants export --resolve=python-default
13:00:32.80 [INFO] Completed: Build pex for resolve `python-default`
13:01:20.03 [INFO] Completed: Get interpreter version
13:01:20.85 [INFO] Completed: Building mypy_protobuf.pex from <resource://pants.backend.codegen.protobuf.python/mypy_protobuf.lock>
Wrote mutable virtualenv for python-default (using Python 3.12.5) to dist/export/python/virtualenvs/python-default/3.12.5

As you can see on the output above, the virtualenv has been created in the different folder instead in the

.~/.cache/pants

Is this ok?

Yes, that is fine. The Pants output directory for exports defaults to

dist/

@fast-nail-55400 Thanks so much for your help. It works perfectly. To be honest, it was difficult to figure out to make it work. The documentation is not beginner friendly. Maybe we should improve the document for beginners. Thanks a lot

Maybe we should improve the document for beginners.

I agree. Would you like to contribute the PR? 🙂 Should be straightforward to do since the docs are just markdown files in the repository at https://github.com/pantsbuild/pants/tree/main/docs/docs.

Dear @fast-nail-55400, Yes, I will do it. 👍

@able-petabyte-69664 Would you mind sharing your

3rdparty/python

contents please? I have

BUILD

and

requirements.txt

there, and an empty

default.lock

. When I run

pants export --resolve=python-default

the resulting venv under

dist/export/python/virtualenvs/python-default/3.12.7

doesn't contain the libraries in my

requirements.txt

file