fix the issue that time.clock() method no longer exists in higher v…

…ersion of python, and close #30

alipy/experiment/stopping_criteria.py

@@ -66,7 +66,7 @@ def __init__(self, stopping_criteria=None, value=None):
             if not isinstance(value, float) and value is not None:
                 value = float(value)
         if stopping_criteria == 'time_limit':
-            self._start_time = time.clock()
+            self._start_time = time.perf_counter()
         self.value = value
 
         # collect information
@@ -102,7 +102,7 @@ def is_stop(self):
             else:
                 return False
         elif self._stopping_criteria == 'time_limit':
-            if time.clock() - self._start_time >= self.value:
+            if time.perf_counter() - self._start_time >= self.value:
                 return True
             else:
                 return False
@@ -132,7 +132,7 @@ def reset(self):
             Reset the current state to the initial.
         """
         self.value = self._init_value
-        self._start_time = time.clock()
+        self._start_time = time.perf_counter()
         self._current_iter = 0
         self._accum_cost = 0
         self._current_unlabel = 100

alipy/utils/multi_thread.py

@@ -109,7 +109,7 @@ def __init__(self, examples, labels, train_idx, test_idx, label_index, unlabel_i
             assert max_thread > 0
             self.__max_thread = max_thread
         # for controlling the print frequency
-        self._start_time = time.clock()
+        self._start_time = time.perf_counter()
         # for displaying the time elapse
         self._thread_time_elapse = [-1] * self._round_num
         # for recovering the workspace
@@ -246,8 +246,8 @@ def __repr__(self):
         return str(tb)
 
     def _if_refresh(self):
-        if time.clock() - self._start_time > self._refresh_interval:
-            self._start_time = time.clock()
+        if time.perf_counter() - self._start_time > self._refresh_interval:
+            self._start_time = time.perf_counter()
             return True
         else:
             return False