[2172] use 3-tuple instead of fixed-size list for loadavg

src/bin/sysinfo/sysinfo.py.in

@@ -90,8 +90,7 @@ def main():
     write_value(f, ' + Hostname: %s\n', s.get_platform_hostname)
     write_value(f, ' + Uptime: %d seconds\n', s.get_uptime)
 
-    l = s.get_loadavg()
-    f.write(' + Loadavg: %f %f %f\n' % (l[0], l[1], l[2]))
+    write_value(f, ' + Loadavg: %f %f %f\n', s.get_loadavg)
 
     f.write('\nMemory\n');
     write_value(f, ' + Total: %d bytes\n', s.get_mem_total)

src/lib/python/isc/sysinfo/sysinfo.py

@@ -164,7 +164,7 @@ class SysInfoLinux(SysInfoPOSIX):
         with open('/proc/loadavg') as f:
             l = f.read().strip().split(' ')
             if len(l) >= 3:
-                self._loadavg = [float(l[0]), float(l[1]), float(l[2])]
+                self._loadavg = (float(l[0]), float(l[1]), float(l[2]))
 
         with open('/proc/meminfo') as f:
             m = f.readlines()
@@ -315,7 +315,7 @@ class SysInfoOpenBSD(SysInfoBSD):
             s = subprocess.check_output(['sysctl', '-n', 'vm.loadavg'])
             l = s.decode('utf-8').strip().split(' ')
             if len(l) >= 3:
-                self._loadavg = [float(l[0]), float(l[1]), float(l[2])]
+                self._loadavg = (float(l[0]), float(l[1]), float(l[2]))
         except (subprocess.CalledProcessError, OSError):
             pass
 
@@ -370,7 +370,7 @@ class SysInfoFreeBSDOSX(SysInfoBSD):
             else:
                 la = l.split(' ')
             if len(la) >= 3:
-                self._loadavg = [float(la[0]), float(la[1]), float(la[2])]
+                self._loadavg = (float(la[0]), float(la[1]), float(la[2]))
         except (subprocess.CalledProcessError, OSError):
             pass