I've cloned the repository and followed the three steps for PyWENO instalaltion, but after import numpy and import sympy, the command import pyweno lead to the following error:

>>> import pyweno Traceback (most recent call last): File "<stdin>", line 1, in <module> ImportError: No module named pyweno

It would be great to have other weights (alternatives to the JS weights) in PyWENO. We'd like to use them in PyClaw. Seems like it wouldn't be too hard to implement.

Related: clawpack/pyclaw#428

When the order of reconstruction is high (ie, starting at 5 or so), PyWENO takes a very long time (and consumes a lot of memory) to generate the various reconstruction coefficients etc. I don't recall this always being the case...

I have no idea whether this is a bug or an issue with my system, but I tried to pip install pyweno and got the following error:

building 'pyweno.cnonuniform' extension

/usr/bin/clang -fno-strict-aliasing -I/Users/ketch/anaconda/include -arch x86_64 -DNDEBUG -g -fwrapv -O3 -Wall -Wstrict-prototypes -I/Users/ketch/anaconda/lib/python2.7/site-packages/numpy/core/include -I/Users/ketch/anaconda/include/python2.7 -c src/nfweno.c -o build/temp.macosx-10.5-x86_64-2.7/src/nfweno.o -std=c99

In file included from src/nfweno.c:24:

In file included from /Users/ketch/anaconda/lib/python2.7/site-packages/numpy/core/include/numpy/ndarrayobject.h:17:

In file included from /Users/ketch/anaconda/lib/python2.7/site-packages/numpy/core/include/numpy/ndarraytypes.h:1761:

/Users/ketch/anaconda/lib/python2.7/site-packages/numpy/core/include/numpy/npy_1_7_deprecated_api.h:15:2: warning: "Using deprecated NumPy API, disable it by "          "#defining NPY_NO_DEPRECATED_API NPY_1_7_API_VERSION" [-W#warnings]

#warning "Using deprecated NumPy API, disable it by " \

 ^

src/nfweno.c:30:10: fatal error: 'nfweno.h' file not found

#include "nfweno.h"

         ^

1 warning and 1 error generated.

error: command '/usr/bin/clang' failed with exit status 1

----------------------------------------
Cleaning up...
Command /Users/ketch/anaconda/bin/python -c "import setuptools, tokenize;__file__='/private/var/folders/vj/_vxww1410077hy9prp5fgx0r0000gn/T/pip_build_ketch/pyweno/setup.py';exec(compile(getattr(tokenize, 'open', open)(__file__).read().replace('\r\n', '\n'), __file__, 'exec'))" install --record /var/folders/vj/_vxww1410077hy9prp5fgx0r0000gn/T/pip-y3lOoh-record/install-record.txt --single-version-externally-managed --compile failed with error code 1 in /private/var/folders/vj/_vxww1410077hy9prp5fgx0r0000gn/T/pip_build_ketch/pyweno
Storing debug log for failure in /Users/ketch/.pip/pip.log

The pyweno code in codegen.py in PyClaw tries to import pyweno.c. As far as I can tell, that doesn't exist in the current version of pyweno.

Calling

f=symbolic.optimal_weights(k,(0.2,))
f[0]

gives

{'k': 3,
 'n': 1,
 (0, 0): (0.144615384615376, 0.0723076923076879),
 (0, 1): (0.152307692307692, 0.304615384615384),
 (0, 2): (2.16000000000000, 1.08000000000000)}

which was confusing to me, since each of the dictionary values should be a number, not a tuple. I only realized what was going on after inspecting the code; it automatically gives splittings when weights become negative. It would be nice to document this and show how the return values should be used.

On archlinux

pip install pyweno -v

Using pip 22.3.1 from /usr/lib/python3.10/site-packages/pip (python 3.10)
Defaulting to user installation because normal site-packages is not writeable
Collecting pyweno
Using cached PyWENO-0.11.2.tar.gz (195 kB)
Running command python setup.py egg_info
Traceback (most recent call last):
File "", line 2, in
File "", line 34, in
File "/tmp/pip-install-8mly5v3e/pyweno_ffd4128001654af2bd11705c47263fe2/setup.py", line 16, in
execfile('version.py') # this sets 'version'
NameError: name 'execfile' is not defined
error: subprocess-exited-with-error

× python setup.py egg_info did not run successfully.
│ exit code: 1
╰─> See above for output.

note: This error originates from a subprocess, and is likely not a problem with pip.
full command: /usr/bin/python -c '
exec(compile('"'"''"'"''"'"'

This is -- a caller that pip uses to run setup.py

- It imports setuptools before invoking setup.py, to enable projects that directly

import from distutils.core to work with newer packaging standards.

- It provides a clear error message when setuptools is not installed.

- It sets sys.argv[0] to the underlying setup.py, when invoking setup.py so

setuptools doesn'"'"'t think the script is -c. This avoids the following warning:

manifest_maker: standard file '"'"'-c'"'"' not found".

- It generates a shim setup.py, for handling setup.cfg-only projects.

import os, sys, tokenize

try:
import setuptools
except ImportError as error:
print(
"ERROR: Can not execute setup.py since setuptools is not available in "
"the build environment.",
file=sys.stderr,
)
sys.exit(1)

file = %r
sys.argv[0] = file

if os.path.exists(file):
filename = file
with tokenize.open(file) as f:
setup_py_code = f.read()
else:
filename = ""
setup_py_code = "from setuptools import setup; setup()"

exec(compile(setup_py_code, filename, "exec"))
'"'"''"'"''"'"' % ('"'"'/tmp/pip-install-8mly5v3e/pyweno_ffd4128001654af2bd11705c47263fe2/setup.py'"'"',), "", "exec"))' egg_info --egg-base /tmp/pip-pip-egg-info-oeunrfiz
cwd: /tmp/pip-install-8mly5v3e/pyweno_ffd4128001654af2bd11705c47263fe2/
Preparing metadata (setup.py) ... error
error: metadata-generation-failed

× Encountered error while generating package metadata.
╰─> See above for output.

note: This is an issue with the package mentioned above, not pip.
hint: See above for details.