replace custom iso8601 datetime parse implementation with built-in

pyperf/_bench.py

@@ -10,7 +10,7 @@
                               _common_metadata, get_metadata_info,
                               _exclude_common_metadata)
 from pyperf._formatter import DEFAULT_UNIT, format_values
-from pyperf._utils import parse_iso8601, median_abs_dev, percentile
+from pyperf._utils import median_abs_dev, percentile
 
 
 # JSON format history:
@@ -595,7 +595,7 @@ def get_dates(self):
             run_start = run._get_date()
             if run_start is None:
                 continue
-            run_start = parse_iso8601(run_start)
+            run_start = datetime.datetime.fromisoformat(run_start)
 
             duration = run._get_duration()
             duration = int(math.ceil(duration))

pyperf/_utils.py

@@ -1,5 +1,4 @@
 import contextlib
-import datetime
 import math
 import os
 import statistics
@@ -14,21 +13,6 @@
 if MS_WINDOWS:
     import msvcrt
 
-
-def parse_iso8601(date):
-    if '.' in date:
-        date, floatpart = date.split('.', 1)
-        floatpart = float('.' + floatpart)
-    else:
-        floatpart = 0
-    try:
-        dt = datetime.datetime.strptime(date, '%Y-%m-%d %H:%M:%S')
-    except ValueError:
-        dt = datetime.datetime.strptime(date, '%Y-%m-%dT%H:%M:%S')
-    dt += datetime.timedelta(seconds=floatpart)
-    return dt
-
-
 # A table of 95% confidence intervals for a two-tailed t distribution, as a
 # function of the degrees of freedom. For larger degrees of freedom, we
 # approximate. While this may look less elegant than simply calculating the

pyperf/tests/test_utils.py

@@ -1,4 +1,3 @@
-import datetime
 import io
 import time
 import unittest
@@ -75,16 +74,6 @@ def test_geometric_mean(self):
 
 
 class TestUtils(unittest.TestCase):
-    def test_parse_iso8601(self):
-        # Default format using 'T' separator
-        self.assertEqual(utils.parse_iso8601('2016-07-20T14:06:07'),
-                         datetime.datetime(2016, 7, 20, 14, 6, 7))
-        # Microseconds
-        self.assertEqual(utils.parse_iso8601('2016-07-20T14:06:07.608319'),
-                         datetime.datetime(2016, 7, 20, 14, 6, 7, 608319))
-        # Space separator
-        self.assertEqual(utils.parse_iso8601('2016-07-20 14:06:07'),
-                         datetime.datetime(2016, 7, 20, 14, 6, 7))
 
     def test_format_seconds(self):
         self.assertEqual(format_seconds(0),