xfail zip compression csv pickle in python 2.x

Author: minggli

pandas/tests/io/test_pickle.py

@@ -357,6 +357,9 @@ def test_write_explicit(self, compression, get_random_path):
         path1 = base + ".compressed"
         path2 = base + ".raw"
 
+        if PY2 and compression == 'zip':
+            pytest.xfail(reason='zip compression not supported in Python 2.')
+
         with tm.ensure_clean(path1) as p1, tm.ensure_clean(path2) as p2:
             df = tm.makeDataFrame()
 
@@ -416,9 +419,6 @@ def test_read_explicit(self, compression, get_random_path):
         path1 = base + ".raw"
         path2 = base + ".compressed"
 
-        if PY2 and compression == 'zip':
-            pytest.xfail(reason='zip compression not supported in Python 2.')
-
         with tm.ensure_clean(path1) as p1, tm.ensure_clean(path2) as p2:
             df = tm.makeDataFrame()