Develop Reference

Unable to download mod_wsgi using pip

Unable to download mod_wsgi using pip install
Getting the below error-
100% |################################| 499kB 379kB/s
C:\Python34\lib\distutils\dist.py:260: UserWarning: Unknown distribution option: 'bugtrack_url'
warnings.warn(msg)
Installing collected packages: mod-wsgi
Running setup.py install for mod-wsgi
building 'mod_wsgi.server.mod_wsgi' extension
C:\Python34\lib\distutils\dist.py:260: UserWarning: Unknown distribution option: 'bugtrack_url'
warnings.warn(msg)
error: Microsoft Visual C++ 10.0 is required (Unable to find vcvarsall.bat).
Complete output from command C:\Python34\python.exe -c "import setuptools, tokenize;file='C:\Users\z003nsbe\AppData\Local\Temp\pip-build-8lso5mlc\mod-wsgi\setup.py';exec(compile(getattr(tokenize, 'open', open)(file).read().replace('\r\n', '\n'), file, 'exec'))" install --record C:\Users\z003nsbe\AppData\Local\Temp\pip-r5xt3gnf-record\install-record.txt --single-version-externally-managed --compile:
running install
running build
running build_py
creating build
creating build\lib.win32-3.4
creating build\lib.win32-3.4\mod_wsgi
copying src\__init__.py -> build\lib.win32-3.4\mod_wsgi
creating build\lib.win32-3.4\mod_wsgi\server
copying src\server\apxs_config.py -> build\lib.win32-3.4\mod_wsgi\server
copying src\server\environ.py -> build\lib.win32-3.4\mod_wsgi\server
copying src\server\__init__.py -> build\lib.win32-3.4\mod_wsgi\server
creating build\lib.win32-3.4\mod_wsgi\server\management
copying src\server\management\__init__.py -> build\lib.win32-3.4\mod_wsgi\server\management
creating build\lib.win32-3.4\mod_wsgi\server\management\commands
copying src\server\management\commands\runmodwsgi.py -> build\lib.win32-3.4\mod_wsgi\server\management\commands
copying src\server\management\commands\__init__.py -> build\lib.win32-3.4\mod_wsgi\server\management\commands
creating build\lib.win32-3.4\mod_wsgi\docs
copying docs\_build\html\__init__.py -> build\lib.win32-3.4\mod_wsgi\docs
creating build\lib.win32-3.4\mod_wsgi\images
copying images\__init__.py -> build\lib.win32-3.4\mod_wsgi\images
copying images\snake-whiskey.jpg -> build\lib.win32-3.4\mod_wsgi\images
running build_ext
building 'mod_wsgi.server.mod_wsgi' extension
C:\Python34\lib\distutils\dist.py:260: UserWarning: Unknown distribution option: 'bugtrack_url'
warnings.warn(msg)
error: Microsoft Visual C++ 10.0 is required (Unable to find vcvarsall.bat).
----------------------------------------
Command "C:\Python34\python.exe -c "import setuptools, tokenize;__file__='C:\\Users\\z003nsbe\\AppData\\Local\\Temp\\pip-build-8lso5mlc\\mod-wsgi\\setup.py';exec(compile(getattr(tokenize, 'open', open)(__file__).read().replace('\r\n', '\n'), __file__, 'exec'))" install --record C:\Users\z003nsbe\AppData\Local\Temp\pip-r5xt3gnf-record\install-record.txt --single-version-externally-managed --compile" failed with error code 1 in C:\Users\z003nsbe\AppData\Local\Temp\pip-build-8lso5mlc\mod-wsgi
Getting error code 1

Do you have Visual Studio installed on your Computer?
Run the same command from Visual studio developer prompt ( preferably after opening it as administrator). Read about visual studio command prompt here. https://learn.microsoft.com/en-us/dotnet/framework/tools/developer-command-prompt-for-vs

I am trying to install "pip install mysqlclient" and it fails everytime. Tried all other things but also didnt work. What should I do?

I am trying to install pip install mysqlclient and it fails everytime. I also tried pip install --only-binary :all: mysqlclient and also not worked. Then I also downloaded whl file and also did't work. I need help.
Using python 3.7.2 and pip 19.0.2 version.
Here's the whole error thats pop up:
Running setup.py clean for mysqlclient
Failed to build mysqlclient
Installing collected packages: mysqlclient
Running setup.py install for mysqlclient ... error
Complete output from command c:\users\vertig~1.0\envs\mypro\scripts\python.exe -u -c "import setuptools, tokenize;__file__='C:\\Users\\VERTIG~1.0\\AppData\\Local\\Temp\\pip-install-b81i8gmq\\mysqlclient\\setup.py';f=getattr(tokenize, 'open', open)(__file__);code=f.read().replace('\r\n', '\n');f.close();exec(compile(code, __file__, 'exec'))" install --record C:\Users\VERTIG~1.0\AppData\Local\Temp\pip-record-6s1gmot9\install-record.txt --single-version-externally-managed --compile --install-headers c:\users\vertig~1.0\envs\mypro\include\site\python3.7\mysqlclient:
running install
running build
running build_py
creating build
creating build\lib.win32-3.7
creating build\lib.win32-3.7\MySQLdb
copying MySQLdb\__init__.py -> build\lib.win32-3.7\MySQLdb
copying MySQLdb\_exceptions.py -> build\lib.win32-3.7\MySQLdb
copying MySQLdb\compat.py -> build\lib.win32-3.7\MySQLdb
copying MySQLdb\connections.py -> build\lib.win32-3.7\MySQLdb
copying MySQLdb\converters.py -> build\lib.win32-3.7\MySQLdb
copying MySQLdb\cursors.py -> build\lib.win32-3.7\MySQLdb
copying MySQLdb\release.py -> build\lib.win32-3.7\MySQLdb
copying MySQLdb\times.py -> build\lib.win32-3.7\MySQLdb
creating build\lib.win32-3.7\MySQLdb\constants
copying MySQLdb\constants\__init__.py -> build\lib.win32-3.7\MySQLdb\constants
copying MySQLdb\constants\CLIENT.py -> build\lib.win32-3.7\MySQLdb\constants
copying MySQLdb\constants\CR.py -> build\lib.win32-3.7\MySQLdb\constants
copying MySQLdb\constants\ER.py -> build\lib.win32-3.7\MySQLdb\constants
copying MySQLdb\constants\FIELD_TYPE.py -> build\lib.win32-3.7\MySQLdb\constants
copying MySQLdb\constants\FLAG.py -> build\lib.win32-3.7\MySQLdb\constants
running build_ext
building 'MySQLdb._mysql' extension
error: Microsoft Visual C++ 14.0 is required. Get it with "Microsoft Visual C++ Build Tools": https://visualstudio.microsoft.com/downloads/
----------------------------------------
Command "c:\users\vertig~1.0\envs\mypro\scripts\python.exe -u -c "import setuptools, tokenize;__file__='C:\\Users\\VERTIG~1.0\\AppData\\Local\\Temp\\pip-install-b81i8gmq\\mysqlclient\\setup.py';f=getattr(tokenize, 'open', open)(__file__);code=f.read().replace('\r\n', '\n');f.close();exec(compile(code, __file__, 'exec'))" install --record C:\Users\VERTIG~1.0\AppData\Local\Temp\pip-record-6s1gmot9\install-record.txt --single-version-externally-managed --compile --install-headers c:\users\vertig~1.0\envs\mypro\include\site\python3.7\mysqlclient" failed with error code 1 in C:\Users\VERTIG~1.0\AppData\Local\Temp\pip-install-b81i8gmq\mysqlclient\```
So any ideas where the error is getting?

Check that you have MySQL installed on your system.
On Mac:
brew install mysql
Installing with APT (eg, Ubuntu):
sudo apt install mysql-server
Or install with the installer: https://dev.mysql.com/downloads/installer/.

error: Microsoft Visual C++ 14.0 is required. Get it with "Microsoft
Visual C++ Build Tools": https://visualstudio.microsoft.com/downloads/
From the error message its pretty clear that the issue is with with C++ installation on your machine.
FYI: Many Python libs uses C++ under the hood so its mandatory to install the Microsoft visual c++(on windows) as mentioned in the error.
You can go ahead and install Microsoft Visual C++ from here or here
Or else if there is no particular use behind mysqlclient you can use this pure pyython MySQL client library named PyMySQL (you need not install visual c++ for using this lib).

How to install SHAP (Shapley) for Python

Tried to install Shapley package (available in R) using
install shap
but got an error:
Building wheels for collected packages: shap, iml
Running setup.py bdist_wheel for shap ... error
Complete output from command C:\Users\Toly_Novik\Anaconda3\python.exe -u -c "import setuptools, tokenize;__file__='C:\\Users\\TOLY_N~1\\AppData\\Local\\Temp \\pip-install-o0p96nl3\\shap\\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 C:\Users\TOLY_N~1\AppData\Local\Temp\pip-wheel-538qnmm2 --python-tag cp36:
running bdist_wheel
running build
running build_py
creating build
creating build\lib.win-amd64-3.6
creating build\lib.win-amd64-3.6\shap
copying shap\datasets.py -> build\lib.win-amd64-3.6\shap
copying shap\plots.py -> build\lib.win-amd64-3.6\shap
copying shap\__init__.py -> build\lib.win-amd64-3.6\shap
creating build\lib.win-amd64-3.6\shap\explainers
copying shap\explainers\ime.py -> build\lib.win-amd64-3.6\shap\explainers
copying shap\explainers\kernel.py -> build\lib.win-amd64-3.6\shap\explainers
copying shap\explainers\mimic.py -> build\lib.win-amd64-3.6\shap\explainers
copying shap\explainers\pytree.py -> build\lib.win-amd64-3.6\shap\explainers
copying shap\explainers\tree.py -> build\lib.win-amd64-3.6\shap\explainers
copying shap\explainers\__init__.py -> build\lib.win-amd64-3.6 \shap\explainers
running build_ext
numpy.get_include() C:\Users\Toly_Novik\Anaconda3\lib\site-packages\numpy\core\include
building 'shap._cext' extension
error: Microsoft Visual C++ 14.0 is required. Get it with "Microsoft Visual C++ Build Tools": http://landinghub.visualstudio.com/visual-cpp-build-tools
Same story for
install xgboost

Are you trying to install shap - a library for explaining Machine Learning models? If so use
pip install shap
See the shap documentation for more info: https://pypi.org/project/shap/

Did you meant to install shapely (https://pypi.org/project/Shapely/)?
In python you can install shapely by doing pip install shapely
For windows shapley can be installed by downloading .whl from http://www.lfd.uci.edu/~gohlke/pythonlibs/#shapely and do
pip install <name of whl file>
or if you are using anaconda you can use conda-forge to get shapely
conda config --add channels conda-forge
conda install shapely
To install xgboost see http://xgboost.readthedocs.io/en/latest/python/python_intro.html
For this you might need gcc (c/c++ compiler) or equivalent Microsoft alternative.
For xgboost with conda you can see this stackoverflow.com/questions/35139108/… or simply do conda install py-xgboost

pip install git+https://github.com/slundberg/shap.git
Using the pip install only, did not work for me (errors running tests), neither did the conda approach.

Cannot Installing mysql-python cannot build or use wheel

I am trying to install mysql-python, I have tried two methods in pip
python -m pip install mysql-python
This does not work saying "Failed Building Wheel for MySQL-Python"
Downloading the wheels MySQL_python-1.2.5-cp27-none-win_amd64 and MySQL_python-1.2.5-cp27-none-win32 and trying to install each of them separately with the command
python -m pip install filename
This does not work in each case saying it is "not supported on this platform'
Does any one know what is wrong and how I can install mysql-python?
Update
Since writing this I am still having trouble getting MySQLdb working but have tried a few more things.
1) I am using Python 3.5 mysql-python is for Python 2.x, I should have been trying to install mysqlclient. However I am now having similar issues as above installing mysqlclient both with wheels and with just pip.
> pip install mysqlclient
Collecting mysqlclient
Using cached mysqlclient-1.3.10.tar.gz
Installing collected packages: mysqlclient
Running setup.py install for mysqlclient ... error
Complete output from command c:\python27\python.exe -u -c "import setuptools, tokenize;__file__='c:\\users\\teddy\\appdata\\local\\temp\\pip-build-lhtha0\\mysqlclient\\setup.py';f=getattr(tokenize, 'open', open)(__file__);code=f.read().replace('\r\n', '\n');f.close();exec(compile(code, __file__, 'exec'))" install --record c:\users\teddy\appdata\local\temp\pip-stnbio-record\install-record.txt --single-version-externally-managed --compile:
running install
running build
running build_py
creating build
creating build\lib.win32-2.7
copying _mysql_exceptions.py -> build\lib.win32-2.7
creating build\lib.win32-2.7\MySQLdb
copying MySQLdb\__init__.py -> build\lib.win32-2.7\MySQLdb
copying MySQLdb\compat.py -> build\lib.win32-2.7\MySQLdb
copying MySQLdb\connections.py -> build\lib.win32-2.7\MySQLdb
copying MySQLdb\converters.py -> build\lib.win32-2.7\MySQLdb
copying MySQLdb\cursors.py -> build\lib.win32-2.7\MySQLdb
copying MySQLdb\release.py -> build\lib.win32-2.7\MySQLdb
copying MySQLdb\times.py -> build\lib.win32-2.7\MySQLdb
creating build\lib.win32-2.7\MySQLdb\constants
copying MySQLdb\constants\__init__.py -> build\lib.win32-2.7\MySQLdb\constants
copying MySQLdb\constants\CLIENT.py -> build\lib.win32-2.7\MySQLdb\constants
copying MySQLdb\constants\CR.py -> build\lib.win32-2.7\MySQLdb\constants
copying MySQLdb\constants\ER.py -> build\lib.win32-2.7\MySQLdb\constants
copying MySQLdb\constants\FIELD_TYPE.py -> build\lib.win32-2.7\MySQLdb\constants
copying MySQLdb\constants\FLAG.py -> build\lib.win32-2.7\MySQLdb\constants
copying MySQLdb\constants\REFRESH.py -> build\lib.win32-2.7\MySQLdb\constants
running build_ext
building '_mysql' extension
creating build\temp.win32-2.7
creating build\temp.win32-2.7\Release
C:\Users\teddy\AppData\Local\Programs\Common\Microsoft\Visual C++ for Python\9.0\VC\Bin\cl.exe /c /nologo /Ox /MD /W3 /GS- /DNDEBUG -Dversion_info=(1,3,10,'final',0) -D__version__=1.3.10 "-IC:\Program Files (x86)\MySQL\MySQL Connector C 6.1\include" -Ic:\python27\include -Ic:\python27\PC /Tc_mysql.c /Fobuild\temp.win32-2.7\Release\_mysql.obj /Zl
_mysql.c
_mysql.c(29) : fatal error C1083: Cannot open include file: 'my_config.h': No such file or directory
error: command 'C:\\Users\\teddy\\AppData\\Local\\Programs\\Common\\Microsoft\\Visual C++ for Python\\9.0\\VC\\Bin\\cl.exe' failed with exit status 2
----------------------------------------
Command "c:\python27\python.exe -u -c "import setuptools, tokenize;__file__='c:\\users\\teddy\\appdata\\local\\temp\\pip-build-lhtha0\\mysqlclient\\setup.py';f=getattr(tokenize, 'open', open)(__file__);code=f.read().replace('\r\n', '\n');f.close();exec(compile(code, __file__, 'exec'))" install --record c:\users\teddy\appdata\local\temp\pip-stnbio-record\install-record.txt --single-version-externally-managed --compile" failed with error code 1 in c:\users\teddy\appdata\local\temp\pip-build-lhtha0\mysqlclient\
2) I have tried installing MySQL connector C. This hasn't changed anything.
3) I have tried getting it working on Spyder the IDE that comes with Anaconda
So can anyone suggest anything else

I finally did it. There were two things I changed to get it working:
My Pip was pointing to an older version of Python I had on my
computer and for some reason Idle was picking it up but not Spyder.
I had to move one of the mysql connector files from:
C:\Program Files\MySQL to C:\Program Files (x86)\MySQL

Error while installing PyGraphviz (Mac OS X, Anaconda)

I'm having trouble while installing PyGraphviz.
I'm using Anaconda in Mac OS X.
Error messages indicates some reasons, but I already checked out it is installed in anaconda directory.
Sundongui-MacBook-Pro:site-packages sundong$ pwd
/Users/sundong/anaconda/lib/python2.7/site-packages
Sundongui-MacBook-Pro:site-packages sundong$ pip install graphviz --upgrade
Requirement already up-to-date: graphviz in /Users/sundong/anaconda/lib/python2.7/site-packages
According to the error messages, How can I change the the include_dirs and library_dirs variables in setup.py??
Here is the error message that I meet
Sundongui-MacBook-Pro:anaconda sundong$ pip install pygraphviz
Collecting pygraphviz
Using cached pygraphviz-1.3.1.tar.gz
Building wheels for collected packages: pygraphviz
Running setup.py bdist_wheel for pygraphviz
Complete output from command /Users/sundong/anaconda/bin/python -c "import setuptools;__file__='/private/var/folders/p6/rjy4tf353bzfy7gsl5jn_yvc0000gn/T/pip-build-bLb4AR/pygraphviz/setup.py';exec(compile(open(__file__).read().replace('\r\n', '\n'), __file__, 'exec'))" bdist_wheel -d /var/folders/p6/rjy4tf353bzfy7gsl5jn_yvc0000gn/T/tmpwR_08Dpip-wheel-:
running bdist_wheel
running build
running build_py
creating build
creating build/lib.macosx-10.5-x86_64-2.7
creating build/lib.macosx-10.5-x86_64-2.7/pygraphviz
copying pygraphviz/__init__.py -> build/lib.macosx-10.5-x86_64-2.7/pygraphviz
copying pygraphviz/agraph.py -> build/lib.macosx-10.5-x86_64-2.7/pygraphviz
copying pygraphviz/graphviz.py -> build/lib.macosx-10.5-x86_64-2.7/pygraphviz
copying pygraphviz/release.py -> build/lib.macosx-10.5-x86_64-2.7/pygraphviz
copying pygraphviz/version.py -> build/lib.macosx-10.5-x86_64-2.7/pygraphviz
creating build/lib.macosx-10.5-x86_64-2.7/pygraphviz/tests
copying pygraphviz/tests/__init__.py -> build/lib.macosx-10.5-x86_64-2.7/pygraphviz/tests
copying pygraphviz/tests/test.py -> build/lib.macosx-10.5-x86_64-2.7/pygraphviz/tests
copying pygraphviz/tests/test_attribute_defaults.py -> build/lib.macosx-10.5-x86_64-2.7/pygraphviz/tests
copying pygraphviz/tests/test_attributes.py -> build/lib.macosx-10.5-x86_64-2.7/pygraphviz/tests
copying pygraphviz/tests/test_clear.py -> build/lib.macosx-10.5-x86_64-2.7/pygraphviz/tests
copying pygraphviz/tests/test_drawing.py -> build/lib.macosx-10.5-x86_64-2.7/pygraphviz/tests
copying pygraphviz/tests/test_edge_attributes.py -> build/lib.macosx-10.5-x86_64-2.7/pygraphviz/tests
copying pygraphviz/tests/test_graph.py -> build/lib.macosx-10.5-x86_64-2.7/pygraphviz/tests
copying pygraphviz/tests/test_html.py -> build/lib.macosx-10.5-x86_64-2.7/pygraphviz/tests
copying pygraphviz/tests/test_layout.py -> build/lib.macosx-10.5-x86_64-2.7/pygraphviz/tests
copying pygraphviz/tests/test_node_attributes.py -> build/lib.macosx-10.5-x86_64-2.7/pygraphviz/tests
copying pygraphviz/tests/test_readwrite.py -> build/lib.macosx-10.5-x86_64-2.7/pygraphviz/tests
copying pygraphviz/tests/test_string.py -> build/lib.macosx-10.5-x86_64-2.7/pygraphviz/tests
copying pygraphviz/tests/test_subgraph.py -> build/lib.macosx-10.5-x86_64-2.7/pygraphviz/tests
copying pygraphviz/tests/test_unicode.py -> build/lib.macosx-10.5-x86_64-2.7/pygraphviz/tests
running egg_info
writing pygraphviz.egg-info/PKG-INFO
writing top-level names to pygraphviz.egg-info/top_level.txt
writing dependency_links to pygraphviz.egg-info/dependency_links.txt
warning: manifest_maker: standard file '-c' not found
reading manifest file 'pygraphviz.egg-info/SOURCES.txt'
reading manifest template 'MANIFEST.in'
warning: no previously-included files matching '*~' found anywhere in distribution
warning: no previously-included files matching '*.pyc' found anywhere in distribution
warning: no previously-included files matching '.svn' found anywhere in distribution
no previously-included directories found matching 'doc/build'
writing manifest file 'pygraphviz.egg-info/SOURCES.txt'
copying pygraphviz/graphviz.i -> build/lib.macosx-10.5-x86_64-2.7/pygraphviz
copying pygraphviz/graphviz_wrap.c -> build/lib.macosx-10.5-x86_64-2.7/pygraphviz
running build_ext
building 'pygraphviz._graphviz' extension
creating build/temp.macosx-10.5-x86_64-2.7
creating build/temp.macosx-10.5-x86_64-2.7/pygraphviz
gcc -fno-strict-aliasing -I/Users/sundong/anaconda/include -arch x86_64 -DNDEBUG -g -fwrapv -O3 -Wall -Wstrict-prototypes -I/Users/sundong/anaconda/include/python2.7 -c pygraphviz/graphviz_wrap.c -o build/temp.macosx-10.5-x86_64-2.7/pygraphviz/graphviz_wrap.o
pygraphviz/graphviz_wrap.c:2954:10: fatal error: 'graphviz/cgraph.h' file not found
#include "graphviz/cgraph.h"
^
1 error generated.
error: command 'gcc' failed with exit status 1
----------------------------------------
Failed building wheel for pygraphviz
Failed to build pygraphviz
Installing collected packages: pygraphviz
Running setup.py install for pygraphviz
Complete output from command /Users/sundong/anaconda/bin/python -c "import setuptools, tokenize;__file__='/private/var/folders/p6/rjy4tf353bzfy7gsl5jn_yvc0000gn/T/pip-build-bLb4AR/pygraphviz/setup.py';exec(compile(getattr(tokenize, 'open', open)(__file__).read().replace('\r\n', '\n'), __file__, 'exec'))" install --record /var/folders/p6/rjy4tf353bzfy7gsl5jn_yvc0000gn/T/pip-qgosXm-record/install-record.txt --single-version-externally-managed --compile:
running install
Trying pkg-config
Failed to find pkg-config
Trying dotneato-config
Failed to find dotneato-config
Failed to find dotneato-config
Your Graphviz installation could not be found.
1) You don't have Graphviz installed:
Install Graphviz (http://graphviz.org)
2) Your Graphviz package might incomplete.
Install the binary development subpackage (e.g. libgraphviz-dev or similar.)
3) You are using Windows
There are no PyGraphviz binary packages for Windows but you might be
able to build it from this source. See
http://networkx.lanl.gov/pygraphviz/reference/faq.html
If you think your installation is correct you will need to manually
change the include_dirs and library_dirs variables in setup.py to
point to the correct locations of your graphviz installation.
The current setting of library_dirs and include_dirs is:
library_dirs=None
include_dirs=None
error: Error locating graphviz.
----------------------------------------
Command "/Users/sundong/anaconda/bin/python -c "import setuptools, tokenize;__file__='/private/var/folders/p6/rjy4tf353bzfy7gsl5jn_yvc0000gn/T/pip-build-bLb4AR/pygraphviz/setup.py';exec(compile(getattr(tokenize, 'open', open)(__file__).read().replace('\r\n', '\n'), __file__, 'exec'))" install --record /var/folders/p6/rjy4tf353bzfy7gsl5jn_yvc0000gn/T/pip-qgosXm-record/install-record.txt --single-version-externally-managed --compile" failed with error code 1 in /private/var/folders/p6/rjy4tf353bzfy7gsl5jn_yvc0000gn/T/pip-build-bLb4AR/pygraphviz

brew install graphviz
then:
pip install --install-option="--include-path=/usr/local/include/" --install-option="--library-path=/usr/local/lib/" pygraphviz
Both path in bold should NOT contain "graphviz".
https://github.com/pygraphviz/pygraphviz/issues/100#issuecomment-237560404
Worked for me on OSX 10.14.1

Assuming that you've already installed graphviz software:
As described in this blog post use the following parameters whilst trying to run pip install pygraphviz
--install-option="--include-path=/usr/local/include/graphviz/" \
--install-option="--library-path=/usr/local/lib/graphviz"
So the final command would look like pip install pygraphviz --install-option="--include-path=/usr/local/include/graphviz/" --install-option="--library-path=/usr/local/lib/graphviz".
What this does is this explicitly specified where the libraries of the original program (graphviz) exist for the python extension to use. Unfortunately, this doesn't seem to get automatically recognized.
Worked on MacOS Sierra with Python 3.6

try the following (make sure to have anaconda-client installed and updated):
conda install --channel https://conda.anaconda.org/garylschultz pygraphviz

Graphviz can be installed via homebrew: brew install graphviz.
Then do:
cd /usr/local/Cellar/graphviz/VERSION/include/graphviz
mkdir graphviz
cp cgraph.h graphviz/
And finally:
pip install graphviz
Tested on Sierra and woks fine.