PyMetric is a network simulation and visualisation tool. It allows the user to trace paths through his network, given a set of nodes and links with metrics (costs). It allows the simulation of metric changes, router failures and link outages, and provides various information relating to the changes in topology and routing. PyMetric can also show various statistics on the topology, such as equal-cost paths, links with assymetric costs, longest paths and lots more. It can even suggest some metric changes to help the user with traffic engineering. PyMetric should perform its job regardless of the routing protocol used (as long as it is a LSP). Comments, feature requests and bug reports should be made here on Github or sent to morten dot knutsen at uninett dot no