PERF: fix asv import error

Author: pv

asv_bench/benchmarks/groupby.py

@@ -6,10 +6,15 @@
 import numpy as np
 
 from pandas import (
-    Categorical, DataFrame, MultiIndex, Series, TimeGrouper, Timestamp,
+    Categorical, DataFrame, MultiIndex, Series, Timestamp,
     date_range, period_range)
 import pandas.util.testing as tm
 
+try:
+    from pandas import TimeGrouper
+except ImportError:
+    pass
+
 
 method_blacklist = {
     'object': {'median', 'prod', 'sem', 'cumsum', 'sum', 'cummin', 'mean',

asv_bench/benchmarks/io/parsers.py

@@ -1,7 +1,10 @@
 import numpy as np
 
-from pandas._libs.tslibs.parsing import (
-    _concat_date_cols, _does_string_look_like_datetime)
+try:
+    from pandas._libs.tslibs.parsing import (
+        _concat_date_cols, _does_string_look_like_datetime)
+except ImportError:
+    pass
 
 
 class DoesStringLookLikeDatetime(object):