Eg.:

TRACE 2019-03-12T10:29:07Z: rustpython_vm::vm: Invoke: [PyObj Any] PyFuncArgs { args: [[PyObj Any], [PyObj Any]], kwargs: [] }
TRACE 2019-03-12T10:29:07Z: rustpython_vm::vm: vm.call_method [PyObj Any] [PyObj Any] "subclasscheck" -> [PyObj Any]
TRACE 2019-03-12T10:29:07Z: rustpython_vm::vm: Invoke: [PyObj Any] PyFuncArgs { args: [[PyObj Any], [PyObj Any], [PyObj Any]], kwargs: [] }