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ERROR: Failed building wheel for numpy , ERROR: Could not build wheels for numpy, which is required to install pyproject.toml-based projects

I`m using python poetry(https://python-poetry.org/) for dependency management in my project.
Though when I`m running poetry install, its giving me below error.
ERROR: Failed building wheel for numpy
Failed to build numpy
ERROR: Could not build wheels for numpy, which is required to install pyproject.toml-based projects
I`m having python 3.9 installed in my laptop.
I installed numpy 1.21.5 using pip install numpy, I even tried to down version it to 1.19.5.
Though I`m getting the same error.
I found out many people are getting ERROR: Failed building wheel for numpy this error in python 3.10, they solved it by down versioning python to 3.9, though that didnt working for me.

I solved it by doing the following steps:-
I updated the pyproject.toml(This file contains all the library/dependency/dev dependency)with the numpy version that I installed using pip install numpy command.
Run poetry lock to update poetry.lock file(contains details information about the library)
Run poetry install again, & it should work fine.
If you are having any problems, you can comment.
I`ll try to answer it.

I had this trying to install numpy with PyPy on macOS.
I solved the issue by first running brew doctor, which showed that my Command Line Tools (XCode) were outdated. Then I just followed the instructions to update them:
sudo rm -rf /Library/Developer/CommandLineTools
sudo xcode-select --install
This solved the issue.
My configuration:
macOS 12.2.1 Monterey
> python --version
Python 3.8.12 (9ef55f6fc369, Oct 25 2021, 05:10:01)
[PyPy 7.3.7 with GCC Apple LLVM 13.0.0 (clang-1300.0.29.3)]

Numpy error solved
Error: failed to build wheels for numpy which is required to install project.tmol
This error cause due to outdated numpy version simply run this command
MATHLAB = "m" pip install numpy
`
My python version:
Python -V=3.9
It doesn't works in se case but most of the time works.
If you are working in venvthen try to install numpy in venv.
Then run your code it will be working
Fine.

Can't install pysam with pip in Python 3.6

Macbook
Mac OSX 10.12.6
Python 3.6.2
cython 0.28.5
pip 18.0
I'm trying to install pysam:
pip3 install pysam
It keeps hitting an error at:
creating build/temp.macosx-10.6-intel-3.6/htslib/cram
htslib/cram/cram_io.c:63:10: fatal error: 'os/lzma_stub.h' file not found
#include "os/lzma_stub.h"
^~~~~~~~~~~~~~~~
1 error generated.
error: command '/usr/bin/clang' failed with exit status 1
Seems like this issue, this, and this were version issues. But I've tried pip3 install pysam==0.13 and 0.14 and 0.15 with the same results.
Suggestions?
I really don't want to deal with installing conda...

My mistake! pip3 install pysam==0.13 actually DOES work. Just leaving this here for posterity.

Clearly, you are missing lzma, which is now part of xz library (https://tukaani.org/xz/). Install that and see if it works. In OSX, you can install it using homebrew: brew install xz.
Another option is to install htslib (http://www.htslib.org/download/), or samtools (can be found in the htslib url).

Python: ImportError: No module named _pluggy

I am getting ImportError: No module named _pluggy error when running tests using pytest.
Then I tried installing pluggy using pip install pluggy. It installs pluggy==0.6.0 successfully, but is still giving the error.
Versions List (From running pip freeze | grep pytest)
pytest==3.3.1
pytest-cov==2.5.1
pytest-metadata==1.5.0
pytest-runner==3.0
pluggy==0.6.0
Python 2.7.12
Shown below is the stack trace
Tests run successfully when run in a virtualenv. What are the possible causes which can cause this error in a non-virtualenv environment?

As it was pointed out by #bouteillebleu the issue was in pytest-metadata package.
The solution was to upgrade the package
pip install --upgrade pytest-metadata

Python error message "Incompatible library version" libxml and etree.so

Update 2:
the main problem turned out to be a different one from what I had thought it was, and asked for help here. I moved the new question to a new post:
Install custom python package in virtualenv
Update:
ok, so I screwed up my non-virtualenv by accident.
The non-virtualenv (normal bash) I could easily fix by removing the manually installed (via pip) lxml and running
conda install lxml --force
But for some reason, that doesn't work in the virtualenv.
There, running
conda install lxml --force
works without error message, but when I run python and simply say
>>> import lxml
Traceback (most recent call last):
File "<stdin>", line 1, in <module>
ImportError: No module named lxml
Any suggestions??
old message:
I'm trying to use virtualenv for my python flask application.
The python code runs perfectly fine without the virtualenv.
I've installed the packages I need in the virtualenv, but I after installing lxml via
pip install lxml
Installing collected packages: lxml
Successfully installed lxml-3.6.0
I get the following error message when running my code:
File "/Users/XXX/xxx/flask-aws/lib/python2.7/site-packages/docx-0.2.4-py2.7.egg/docx.py", line 17, in <module>
from lxml import etree
ImportError: dlopen(/Users/XXX/xxx/flask-aws/lib/python2.7/site-packages/lxml/etree.so, 2): Library not loaded: libxml2.2.dylib
Referenced from: /Users/XXX/xxx/flask-aws/lib/python2.7/site-packages/lxml/etree.so
Reason: Incompatible library version: etree.so requires version 12.0.0 or later, but libxml2.2.dylib provides version 10.0.0
I have seen other people report similar problems at stackoverflow, and one guy remarked that the problem might related to the virtualenv, but there was no solution.
Once again: The python code runs perfectly fine without virtualenv! But inside virtualenv, I can't get it to work.
I'm using Anaconda Python 2.7 on a Mac.
I'd appreciate any help guys!

I had the same error and stumbled upon this link, after searching for the incompatible library error "libxml2.2.dylib provides version 10.0.0"
Installing libxml2 that worked for me:
brew install libxml2
brew link --force libxml2

Solution that works for me in virtual environment is to force pip to recompile lxml:
pip install lxml --force-reinstall --ignore-installed --no-binary :all:

Importing opencv and getting numpy.core.multiarray failed to import

Trying to install OpenCV and running into an issue where attempting to import cv2 results in this output -
RuntimeError: module compiled against API version 9 but this version of numpy is 7
Traceback (most recent call last):
File "<pyshell#4>", line 1, in <module>
import cv2
ImportError: numpy.core.multiarray failed to import
I'm running on Windows 7 x64, Python v 2.7.9
Thanks!

The error is telling you that you have an out of date version of numpy. If you used pip to install things you can simply run pip install numpy -U, or download the appropriate version from their website.

In case
pip install -U numpy
doesn't work (even with sudo), you may want to make sure you're using the right version of numpy. I had the same "numpy.core.multiarray failed to import" issue, but it was because I had 1.6 installed for the version of Python I was using, even though I kept installing 1.8 and assumed it was installing in the right directory.
I found the bad numpy version by using the following command in my Mac terminal:
python -c "import numpy;print numpy.version;print numpy.file";
This command gave me the version and location of numpy that I was using (turned out it was 1.6.2). I went to this location and manually replaced it with the numpy folder for 1.8, which resolved my "numpy.core.multiarray failed to import" issue. Hopefully someone finds this useful!

I had a similar problem and I solved it by downgrading my numpy version.
What I did was:
pip install opencv-python
pip uninstall numpy
pip install numpy=1.18
This has worked for me using
Python 3.7
opencv-python 4.4.0.46
numpy 1.18.0

linux: sudo apt-get install python-numpy

if you are using ubuntu bionic beaver then try running: sudo apt-get install python-numpy
had the same issue, resolve by running the above command.
Hope it helps

In your environment you can try this command:
conda uninstall numpy
conda install -c conda-forge numpy

I use Python 3.7 # RPI 4.
For opencv to install properly I had to install the listed libraries below.
(Not every package was actually installed, after request)
Regarding Numpy, I think one should stick to the latest version.
For me what worked is to uninstall the existing version 1.16.2 and stick with the current stable 1.21.2.
Stackoverflow topic at missing libraries here: ImportError: libcblas.so.3: cannot open shared object file: No such file or directory.