how to install python library in heroku - python-3.x

Question

I am running web apps on heroku.
I wanna use TA-Lib. this is library of python.
I got error when install it on heroku.
heroku run pip install ta-lib
main, error: command 'gcc' failed with exit status 1.
Collecting TA-Lib
Using cached TA-Lib-0.4.10.tar.gz
Building wheels for collected packages: TA-Lib
Running setup.py bdist_wheel for TA-Lib ... error
Complete output from command /app/.heroku/python/bin/python -u -c "import setuptools, tokenize;__file__='/tmp/pip-build-ggrhshl_/TA-Lib/setup.py';f=getattr(tokenize, 'open', open)(__file__);code=f.read().replace('\r\n', '\n');f.close();exec(compile(code, __file__, 'exec'))" bdist_wheel -d /tmp/tmpy3tq74cipip-wheel- --python-tag cp36:
/tmp/pip-build-ggrhshl_/TA-Lib/setup.py:77: UserWarning: Cannot find ta-lib library, installation may fail.
warnings.warn('Cannot find ta-lib library, installation may fail.')
running bdist_wheel
running build
running build_py
creating build
creating build/lib.linux-x86_64-3.6
creating build/lib.linux-x86_64-3.6/talib
copying talib/test_func.py -> build/lib.linux-x86_64-3.6/talib
copying talib/deprecated.py -> build/lib.linux-x86_64-3.6/talib
copying talib/test_stream.py -> build/lib.linux-x86_64-3.6/talib
copying talib/test_abstract.py -> build/lib.linux-x86_64-3.6/talib
copying talib/test_data.py -> build/lib.linux-x86_64-3.6/talib
copying talib/__init__.py -> build/lib.linux-x86_64-3.6/talib
running build_ext
building 'talib.common' extension
creating build/temp.linux-x86_64-3.6
creating build/temp.linux-x86_64-3.6/talib
gcc -pthread -Wno-unused-result -Wsign-compare -DNDEBUG -g -fwrapv -O3 -Wall -Wstrict-prototypes -fPIC -I/app/.heroku/python/lib/python3.6/site-packages/numpy/core/include -I/usr/include -I/usr/local/include -I/opt/include -I/opt/local/include -I/app/.heroku/python/include/python3.6m -c talib/common.c -o build/temp.linux-x86_64-3.6/talib/common.o
talib/common.c:242:28: fatal error: ta-lib/ta_defs.h: No such file or directory
#include "ta-lib/ta_defs.h"
^
compilation terminated.
error: command 'gcc' failed with exit status 1
----------------------------------------
Failed building wheel for TA-Lib
Running setup.py clean for TA-Lib
Failed to build TA-Lib
Installing collected packages: TA-Lib
Running setup.py install for TA-Lib ... error
Complete output from command /app/.heroku/python/bin/python -u -c "import setuptools, tokenize;__file__='/tmp/pip-build-ggrhshl_/TA-Lib/setup.py';f=getattr(tokenize, 'open', open)(__file__);code=f.read().replace('\r\n', '\n');f.close();exec(compile(code, __file__, 'exec'))" install --record /tmp/pip-7lciel7r-record/install-record.txt --single-version-externally-managed --compile:
/tmp/pip-build-ggrhshl_/TA-Lib/setup.py:77: UserWarning: Cannot find ta-lib library, installation may fail.
warnings.warn('Cannot find ta-lib library, installation may fail.')
running install
running build
running build_py
creating build
creating build/lib.linux-x86_64-3.6
creating build/lib.linux-x86_64-3.6/talib
copying talib/test_func.py -> build/lib.linux-x86_64-3.6/talib
copying talib/deprecated.py -> build/lib.linux-x86_64-3.6/talib
copying talib/test_stream.py -> build/lib.linux-x86_64-3.6/talib
copying talib/test_abstract.py -> build/lib.linux-x86_64-3.6/talib
copying talib/test_data.py -> build/lib.linux-x86_64-3.6/talib
copying talib/__init__.py -> build/lib.linux-x86_64-3.6/talib
running build_ext
building 'talib.common' extension
creating build/temp.linux-x86_64-3.6
creating build/temp.linux-x86_64-3.6/talib
gcc -pthread -Wno-unused-result -Wsign-compare -DNDEBUG -g -fwrapv -O3 -Wall -Wstrict-prototypes -fPIC -I/app/.heroku/python/lib/python3.6/site-packages/numpy/core/include -I/usr/include -I/usr/local/include -I/opt/include -I/opt/local/include -I/app/.heroku/python/include/python3.6m -c talib/common.c -o build/temp.linux-x86_64-3.6/talib/common.o
talib/common.c:242:28: fatal error: ta-lib/ta_defs.h: No such file or directory
#include "ta-lib/ta_defs.h"
^
compilation terminated.
error: command 'gcc' failed with exit status 1
----------------------------------------
Command "/app/.heroku/python/bin/python -u -c "import setuptools, tokenize;__file__='/tmp/pip-build-ggrhshl_/TA-Lib/setup.py';f=getattr(tokenize, 'open', open)(__file__);code=f.read().replace('\r\n', '\n');f.close();exec(compile(code, __file__, 'exec'))" install --record /tmp/pip-7lciel7r-record/install-record.txt --single-version-externally-managed --compile" failed with error code 1 in /tmp/pip-build-ggrhshl_/TA-Lib/
I have avoid when I installed ta-lib in my ubuntu.
sudo apt-get install python3-dev
Problem is what sudo command can't use on heroku.
so I don't know what I have to do.
how to install ta-lib in heroku ??

Answer 1

Add this one to your app's buildpack list: https://github.com/numrut/heroku-buildpack-python-talib
It should be placed after heroku/python.
And remove TA-Lib from your requirements.txt if it is already there.