TST: don't import from another test with pytest

blaze/compute/tests/test_postgresql_compute.py

@@ -1,5 +1,6 @@
-import itertools
 from datetime import timedelta
+import itertools
+import re
 
 import pytest
 
@@ -14,12 +15,16 @@
 from odo import odo, resource, drop, discover
 from blaze import symbol, compute, concat
 
-from blaze.compute.tests.test_sql_compute import normalize
-
 
 names = ('tbl%d' % i for i in itertools.count())
 
 
+def normalize(s):
+    s = ' '.join(s.strip().split()).lower()
+    s = re.sub(r'(alias)_?\d*', r'\1', s)
+    return re.sub(r'__([A-Za-z_][A-Za-z_0-9]*)', r'\1', s)
+
+
 @pytest.fixture
 def url():
     return 'postgresql://postgres@localhost/test::%s' % next(names)