in mtrl/logger.py [0:0]
def _format(self, key, value, ty):
template = "%s: "
if ty == "int":
template += "%d"
elif ty == "float":
template += "%.04f"
elif ty == "time":
template += "%.01f s"
elif ty == "str":
template += "%s"
else:
raise "invalid format type: %s" % ty
return template % (key, value)