Use realistic timer for Gauge.set_to_current_time

set_to_current_time is expected to set the value to a realistic time.
Performance counters are monotonic but don't say anything about the actual
time.

Author: hynek

prometheus_client/core.py

@@ -9,8 +9,8 @@
 import os
 import re
 import struct
+import time
 import types
-from timeit import default_timer
 
 try:
     from BaseHTTPServer import BaseHTTPRequestHandler
@@ -19,6 +19,7 @@
     unicode = str
 
 from threading import Lock
+from timeit import default_timer
 
 from .decorator import decorate
 
@@ -609,7 +610,7 @@ def set(self, value):
 
     def set_to_current_time(self):
         '''Set gauge to the current unixtime.'''
-        self.set(default_timer())
+        self.set(time.time())
 
     def track_inprogress(self):
         '''Track inprogress blocks of code or functions.