When generating my python lockfile I'm receiving the following error:

import numpy as np
  ModuleNotFoundError: No module named 'numpy'
  ----------------------------------------
  ERROR: Failed building wheel for nmslib
ERROR: Failed to build one or more wheels

Confirmed the deps exist in the requirements file and what not. Tips for debugging?

It's all right there in the message - nmslib is broken. See here: https://github.com/nmslib/nmslib/blob/ade4bcdc9dd3719990de2503871450b8a62df4a5/python_bindings/setup.py#L165 Now that

setup.py

uses

setup_requires

to try and get

numpy

pre-installed, but the

setup_requires

is known broken and even part of the motivation for PEP-518. The easiest thing to do is probably fork the repo and add a

pyproject.toml

with this contents at `python_bindings/pyproject.toml`:

[build-system]
requires = ["setuptools", numpy>=1.10.0 ; python_version>='3.5']
build-backend = "setuptools.build_meta"

You then depend on

nmslib

via a VCS requirement instead of your current requirement string (whatever that is) :`git+https://github.com/<your fork>/nmslib@<sha or tag or branch>#egg=nmslib&subdirectory=python_bindings`. My advice above was lazy and I read all this from the tip of the master branch of the nmslib repo, you almost certainly need to adjust details to pick out the branch / tag / sha you actually want to target.

Yikes. Ok, thanks for the info, John. Appreciate the tips.

You're welcome.