I ran into this error while installing Tensorflow Federated. I am using Python 3.9
Collecting numpy~=1.18.4 (from tensorflow-federated)
Using cached numpy-1.18.5.zip (5.4 MB)
Installing build dependencies … done
Getting requirements to build wheel … done
Preparing metadata (pyproject.toml) … error
error: subprocess-exited-with-error
× Preparing metadata (pyproject.toml) did not run successfully.
│ exit code: 1
╰─> [54 lines of output]
Running from numpy source directory.
:461: UserWarning: Unrecognized setuptools command, proceeding with generating Cython sources and expanding templates
/private/var/folders/c7/9m1bsc9d0qz8dnmmnty3jgc00000gn/T/pip-install-fjzlbqdd/numpy_d4b9b1567fbe4f98b8b863467c8be452/tools/cythonize.py:75: DeprecationWarning: distutils Version classes are deprecated. Use packaging.version instead.
required_version = LooseVersion(‘0.29.14’)
/private/var/folders/c7/9m1bsc9d0qz8dnmmnty3jgc00000gn/T/pip-install-fjzlbqdd/numpy_d4b9b1567fbe4f98b8b863467c8be452/tools/cythonize.py:77: DeprecationWarning: distutils Version classes are deprecated. Use packaging.version instead.
if LooseVersion(cython_version) < required_version:
Error compiling Cython file:
------------------------------------------------------------
...
self.rng_state.ctr.v[i] = counter[i]
self._reset_state_variables()
self._bitgen.state = <void *>&self.rng_state
self._bitgen.next_uint64 = &philox_uint64
^
------------------------------------------------------------
_philox.pyx:195:35: Cannot assign type 'uint64_t (*)(void *) except? -1 nogil' to 'uint64_t (*)(void *) noexcept nogil'. Exception values are incompatible. Suggest adding 'noexcept' to type 'uint64_t (void *) except? -1 nogil'.
Processing numpy/random/_bounded_integers.pxd.in
Processing numpy/random/_philox.pyx
Traceback (most recent call last):
File "/private/var/folders/c7/9m1bsc9d0qz8dnmmnty3jgc00000gn/T/pip-install-fjzlbqdd/numpy_d4b9b1567fbe4f98b8b863467c8be452/tools/cythonize.py", line 238, in <module>
main()
File "/private/var/folders/c7/9m1bsc9d0qz8dnmmnty3jgc00000gn/T/pip-install-fjzlbqdd/numpy_d4b9b1567fbe4f98b8b863467c8be452/tools/cythonize.py", line 234, in main
find_process_files(root_dir)
File "/private/var/folders/c7/9m1bsc9d0qz8dnmmnty3jgc00000gn/T/pip-install-fjzlbqdd/numpy_d4b9b1567fbe4f98b8b863467c8be452/tools/cythonize.py", line 225, in find_process_files
process(root_dir, fromfile, tofile, function, hash_db)
File "/private/var/folders/c7/9m1bsc9d0qz8dnmmnty3jgc00000gn/T/pip-install-fjzlbqdd/numpy_d4b9b1567fbe4f98b8b863467c8be452/tools/cythonize.py", line 191, in process
processor_function(fromfile, tofile)
File "/private/var/folders/c7/9m1bsc9d0qz8dnmmnty3jgc00000gn/T/pip-install-fjzlbqdd/numpy_d4b9b1567fbe4f98b8b863467c8be452/tools/cythonize.py", line 80, in process_pyx
subprocess.check_call(
File "/Applications/Xcode.app/Contents/Developer/Library/Frameworks/Python3.framework/Versions/3.9/lib/python3.9/subprocess.py", line 373, in check_call
raise CalledProcessError(retcode, cmd)
subprocess.CalledProcessError: Command '['/Users/abc/Documents/GitHub/tff-dp-SecAgg/.venv/bin/python', '-m', 'cython', '-3', '--fast-fail', '-o', '_philox.c', '_philox.pyx']' returned non-zero exit status 1.
Cythonizing sources
Traceback (most recent call last):
File "/Users/abc/Documents/GitHub/tff-dp-SecAgg/.venv/lib/python3.9/site-packages/pip/_vendor/pyproject_hooks/_in_process/_in_process.py", line 353, in <module>
main()
File "/Users/abc/Documents/GitHub/tff-dp-SecAgg/.venv/lib/python3.9/site-packages/pip/_vendor/pyproject_hooks/_in_process/_in_process.py", line 335, in main
json_out['return_val'] = hook(**hook_input['kwargs'])
File "/Users/abc
/Documents/GitHub/tff-dp-SecAgg/.venv/lib/python3.9/site-packages/pip/_vendor/pyproject_hooks/_in_process/_in_process.py", line 149, in prepare_metadata_for_build_wheel
return hook(metadata_directory, config_settings)
File “/private/var/folders/c7/9m1bsc9d0qz8dnmmnty3jgc00000gn/T/pip-build-env-j9vb0olx/overlay/lib/python3.9/site-packages/setuptools/build_meta.py”, line 396, in prepare_metadata_for_build_wheel
self.run_setup()
File “/private/var/folders/c7/9m1bsc9d0qz8dnmmnty3jgc00000gn/T/pip-build-env-j9vb0olx/overlay/lib/python3.9/site-packages/setuptools/build_meta.py”, line 507, in run_setup
super(_BuildMetaLegacyBackend, self).run_setup(setup_script=setup_script)
File “/private/var/folders/c7/9m1bsc9d0qz8dnmmnty3jgc00000gn/T/pip-build-env-j9vb0olx/overlay/lib/python3.9/site-packages/setuptools/build_meta.py”, line 341, in run_setup
exec(code, locals())
File “”, line 488, in
File “”, line 469, in setup_package
File “”, line 275, in generate_cython
RuntimeError: Running cythonize failed!
[end of output]
note: This error originates from a subprocess, and is likely not a problem with pip.
error: metadata-generation-failed
× Encountered error while generating package metadata.
╰─> See above for output.