No local packages or download links found for graphviz

[lzh19961031]

Installed /usr/local/lib/python2.7/dist-packages/mxnet-0.10.1-py2.7.egg Processing dependencies for mxnet==0.10.1 Searching for graphviz Reading http://pypi.python.org/simple/graphviz/ Couldn't find index page for 'graphviz' (maybe misspelled?) Scanning index of all packages (this may take a while) Reading http://pypi.python.org/simple/ No local packages or download links found for graphviz Best match: None Traceback (most recent call last): File "setup.py", line 83, in **kwargs) File "/usr/lib/python2.7/distutils/core.py", line 151, in setup dist.run_commands() File "/usr/lib/python2.7/distutils/dist.py", line 953, in run_commands self.run_command(cmd) File "/usr/lib/python2.7/distutils/dist.py", line 972, in run_command cmd_obj.run() File "build/bdist.linux-x86_64/egg/setuptools/command/install.py", line 76, in run File "build/bdist.linux-x86_64/egg/setuptools/command/install.py", line 104, in do_egg_install File "build/bdist.linux-x86_64/egg/setuptools/command/easy_install.py", line 211, in run File "build/bdist.linux-x86_64/egg/setuptools/command/easy_install.py", line 427, in easy_install File "build/bdist.linux-x86_64/egg/setuptools/command/easy_install.py", line 478, in install_item File "build/bdist.linux-x86_64/egg/setuptools/command/easy_install.py", line 519, in process_distribution File "build/bdist.linux-x86_64/egg/pkg_resources.py", line 563, in resolve File "build/bdist.linux-x86_64/egg/pkg_resources.py", line 799, in best_match File "build/bdist.linux-x86_64/egg/pkg_resources.py", line 811, in obtain File "build/bdist.linux-x86_64/egg/setuptools/command/easy_install.py", line 434, in easy_install File "build/bdist.linux-x86_64/egg/setuptools/package_index.py", line 475, in fetch_distribution AttributeError: 'NoneType' object has no attribute 'clone'