# Install graphviz. # class graphviz { package { "graphviz": ensure => installed, } } # Install python bindings for graphviz. # class graphviz::python inherits graphviz { package { "graphviz-python": name => $::operatingsystem ? { debian => "libgv-python", ubuntu => "libgv-python", default => "graphviz-python", }, ensure => installed, } }