Develop Reference

How can i solve "architecture not supported" when installing flask_mysqldb in venv

i got this error when i run pip install flask-mysqldb in my project venv:
In file included from MySQLdb/_mysql.c:29:
In file included from /usr/local/Cellar/mysql/8.0.23_1/include/mysql/mysql.h:46:
In file included from /Library/Developer/CommandLineTools/SDKs/MacOSX.sdk/usr/include/sys/types.h:81:
/Library/Developer/CommandLineTools/SDKs/MacOSX.sdk/usr/include/machine/endian.h:37:2: error: architecture not supported
#error architecture not supported
^
fatal error: too many errors emitted, stopping now [-ferror-limit=]
20 errors generated.
error: command 'clang' failed with exit status 1
I have python 3.8.2

It seems that you have a MacOS. Check which clang are you using, as it seems that it is the source of your error. If it shows you some error when trying to run the clang command directly from your console, try to do a fresh Xcode installation with xcode-select --install. By doing so, maybe you can run now the clang command without errors, and therefore, install the pip library.
Check this post for more details.

Can't install BGSlibrary(pybgs) library from pypi for python using visual studio 2017

I have been trying for 3 days to install this library. It uses CMake and i can't understand how to add OpenCV path within visual studio. I have tried a lot of things like:
1.use CMake-GUI to generate .sln file then build there is also an error.
2.try to add through cmd with CMake but there I face another error.
I believe there is a simple way of directly doing it through visual studio which I am unfamiliar of and can't seem to find it. If someone is kind enough to tell me in simple way how to install library using visual studio python 3.6.
Here is the error I get in VS 2017 after I try to install pybgs library through pip install pybgs
ERROR: Failed building wheel for pybgs
Failed to build pybgs
Installing collected packages: pybgs
Running setup.py install for pybgs: started
Running setup.py install for pybgs: finished with status 'error'
ERROR: Command errored out with exit status 1:
CMake Error at CMakeLists.txt:113 (find_package):
By not providing "FindOpenCV.cmake" in CMAKE_MODULE_PATH this project has
asked CMake to find a package configuration file provided by "OpenCV", but
CMake did not find one.
Could not find a package configuration file provided by "OpenCV" with any
of the following names:
OpenCVConfig.cmake
opencv-config.cmake

pip install CrossMap failing on OSX: cannot find os/rand.c?

Just trying to run a
pip install CrossMap
on OSX 10.11.6 with a brew installed python (version 2.7.12) and pip (version 9.0.1) and running into this error:
htslib/hts_os.c:30:10: fatal error: 'os/rand.c' file not found
#include "os/rand.c"
^
1 error generated.
error: command 'clang' failed with exit status 1
I have looked everywhere for information on this error and it has come up empty. Where does this dependency come from and how do I install it?
Thanks!

CrossMap depends on pysam which is a wrapper for sam tools. You need to install htslib before compiling pysam.

Install locust in Anaconda

I´m was trying to install locustio following this steps (http://docs.locust.io/en/latest/installation.html), in my terminal:
pip install locustio
I get this:
ld: library not found for -lgcc_s.10.5
clang: error: linker command failed with exit code 1 (use -v to see invocation)
error: command 'gcc' failed with exit status 1
I also have tried with easy_install:
sudo easy_install locustio
I get the same error. After that, yesterday I was looking for information about this, and some people says that you may to need install gcc.
brew install gcc
I get this message:
Warning: gcc-5.3.0 already installed
After a couple of hours looking for information, I read about Anaconda, I install Anaconda and I create my new environment... and in my new environment I get this again:
ld: library not found for -lgcc_s.10.5
clang: error: linker command failed with exit code 1 (use -v to see invocation)
error: command 'gcc' failed with exit status 1
I´m getting crazy. I would like to work in environments but I need some of help to do this because I lost a lot time trying to resolve this problem to use locustio.
I´m using Mac Yosemite 10.10.3
My Anaconda version is 3.19.0
My Python version is 2.7.11
My gcc is gcc-5.3.0
Someone can help me?
I just wanna launch locustio in my pc =(

Installing Ephem package in Python 3

I would like to install the ephem package in my Python 3.3.0 version under Windows XP.
I tried first the pip install ephem route from the system command prompt. The process aborted with the error message of Unable to find vcvarsall.bat.
I read prior advice on the net for such a difficulty. Following it I installed mingw32 in my computer, added C:\MinGW\bin to the PATH variable and provided Lib / distutils with a new file called distutils.cfg and the content:
[build]
compiler=mingw32
On running now any of the install commands (pip, *easy_install* and setup.py all work the same) the following error results:
C:\MinGW\bin\gcc.exe -mno-cygwin -mdll -O -Wall -Ilibastro-3.7.5 -IC:\Python33\
include -IC:\Python33\include -c extensions/_libastro.c -o build\temp.win32-3.3\
Release\extensions\_libastro.o
cc1.exe: error: unrecognised command line option '-mno-cygwin'
error: command 'gcc' failed with exit status 1
I have tried to understand and solve the problem, but have been unsuccesful. I have not been able even to find the place in the code where such values are established.
¿Could somebody provide any help? ¿Would ephem be one of the cases alluded by Installing Python modules in the 3.3.0 Documentation with "Not all extensions can be built with MinGW or Cygwin, but many can."?
Thanks in advance
Paco

Here is an extremely useful page of Windows binaries of python packages: http://www.lfd.uci.edu/~gohlke/pythonlibs/.
It includes binaries for pyephem.