Can we build the project without requirements.txt ? about pex HOT 3 CLOSED

/tmp/example $ tree
.
└── package
    ├── bar.py
    ├── baz.py
    └── foo.py

1 directory, 3 files
/tmp/example $ cat package/foo.py
from package import bar, baz


if __name__ == "__main__":
    print(
        "3rdparty paths:\n{paths}".format(paths="\n".join((bar.colors_path(), baz.cowsay_path())))
    )

/tmp/example $ cat package/bar.py
import colors


def colors_path():
    return colors.__file__

/tmp/example $ cat package/baz.py
import cowsay


def cowsay_path():
    return cowsay.__file__

/tmp/example $ python -m package.foo
Traceback (most recent call last):
  File "/usr/lib/python3.10/runpy.py", line 196, in _run_module_as_main
    return _run_code(code, main_globals, None,
  File "/usr/lib/python3.10/runpy.py", line 86, in _run_code
    exec(code, run_globals)
  File "/tmp/example/package/foo.py", line 1, in <module>
    from package import bar, baz
  File "/tmp/example/package/bar.py", line 1, in <module>
    import colors
ModuleNotFoundError: No module named 'colors'

/tmp/example $ pex ansicolors cowsay -o 3rdparty.pex
/tmp/example $ ./3rdparty.pex -m package.foo
3rdparty paths:
/home/jsirois/.pex/installed_wheels/00d2dde5a675579325902536738dd27e4fac1fd68f773fe36c21044eb559e187/ansicolors-1.1.8-py2.py3-none-any.whl/colors/__init__.py
/home/jsirois/.pex/installed_wheels/274b1e6fc1b966d53976333eb90ac94cb07a450a700b455af9fbdf882244b30a/cowsay-6.1-py3-none-any.whl/cowsay/__init__.py

# Can't find it.
/tmp/example $ mv 3rdparty.pex ..
/tmp $ ./3rdparty.pex -m package.foo
...
  File "/home/jsirois/.pex/unzipped_pexes/c144d47a2d979a2605964d3858d98aaf6adf9f6f/.bootstrap/pex/pex.py", line 818, in execute_module
    runpy.run_module(module_name, run_name="__main__", alter_sys=True)
  File "<frozen runpy>", line 222, in run_module
  File "<frozen runpy>", line 140, in _get_module_details
ImportError: Error while finding module specification for 'package.foo' (ModuleNotFoundError: No module named 'package')

# Still can't find it because PEXes are hermetic by default and ignore your environment (the `PYTHONPATH` setting in this case).
$ PYTHONPATH=example ./3rdparty.pex -m package.foo
  File "/home/jsirois/.pex/unzipped_pexes/c144d47a2d979a2605964d3858d98aaf6adf9f6f/.bootstrap/pex/pex.py", line 818, in execute_module
    runpy.run_module(module_name, run_name="__main__", alter_sys=True)
  File "<frozen runpy>", line 222, in run_module
  File "<frozen runpy>", line 140, in _get_module_details
ImportError: Error while finding module specification for 'package.foo' (ModuleNotFoundError: No module named 'package')

# Now can find it.
$ PEX_INHERIT_PATH=prefer PYTHONPATH=example ./3rdparty.pex -m package.foo
3rdparty paths:
/home/jsirois/.pex/installed_wheels/00d2dde5a675579325902536738dd27e4fac1fd68f773fe36c21044eb559e187/ansicolors-1.1.8-py2.py3-none-any.whl/colors/__init__.py
/home/jsirois/.pex/installed_wheels/274b1e6fc1b966d53976333eb90ac94cb07a450a700b455af9fbdf882244b30a/cowsay-6.1-py3-none-any.whl/cowsay/__init__.py