Python 3 compatibilty

Ska/tdb/__init__.py

@@ -1,9 +1,11 @@
 from .tdb import *
 
+__version__ = '3.5.1'
+
 
 def test(*args, **kwargs):
-    import os
-    import pytest
-    pkg_path = os.path.dirname(__file__)
-    os.chdir(pkg_path)
-    pytest.main(list(args), **kwargs)
+    '''
+    Run py.test unit tests.
+    '''
+    import testr
+    return testr.test(*args, **kwargs)

Ska/tdb/tdb.py

@@ -8,10 +8,9 @@
 import glob
 
 import numpy as np
+import six
 
-from .version import version as __version__
-
-__all__ = ['msids', 'tables', '__version__', 'set_tdb_version', 'get_tdb_version',
+__all__ = ['msids', 'tables', 'set_tdb_version', 'get_tdb_version',
            'TableView', 'MsidView']
 
 
@@ -128,10 +127,26 @@ class TableView(object):
       tables['tpp']['TEPHIN']  # Point pair for TEPHIN
     """
     def __init__(self, data):
-        self.data = data
+        if six.PY2 or isinstance(data, np.void):
+            # np.void case is when TableView is passed a table row, in which case
+            # it has already been converted to string.
+            self.data = data
+
+        else:
+            # Convert numpy bytes (S) to string (U) within structured array
+            dtypes = []
+            for name, typestr in data.dtype.descr:
+                typestr = re.sub(r'S', 'U', typestr)
+                dtypes.append((name, typestr))
+            out = np.ndarray(len(data), dtype=dtypes)
+            for name in data.dtype.names:
+                # Note that numpy doesn't require explicit decode encoding to
+                # be specified.
+                out[name] = data[name]
+            self.data = out
 
     def __getitem__(self, item):
-        if isinstance(item, basestring):
+        if isinstance(item, six.string_types):
             item = item.upper()
             if (item not in self.data.dtype.names and
                     'MSID' in self.data.dtype.names):

setup.py

@@ -1,32 +1,22 @@
-import sys
 from setuptools import setup
-from setuptools.command.test import test as TestCommand
 
-from Ska.tdb.version import version
+from Ska.tdb import __version__
 
 
-class PyTest(TestCommand):
-    user_options = [('args=', 'a', "Arguments to pass to py.test")]
-
-    def initialize_options(self):
-        TestCommand.initialize_options(self)
-        self.args = []
-
-    def run_tests(self):
-        import pytest
-        errno = pytest.main(self.args)
-        sys.exit(errno)
+try:
+    from testr.setup_helper import cmdclass
+except ImportError:
+    cmdclass = {}
 
 
 setup(name='Ska.tdb',
       author='Tom Aldcroft',
       url="http://cxc.harvard.edu/mta/ASPECT/tool_doc/pydocs/Ska.tdb",
       description='Access to Chandra Telemetry Database (TDB)',
-      author_email='aldcroft@head.cfa.harvard.edu',
-      version=version,
+      author_email='taldcroft@cfa.harvard.edu',
+      version=__version__,
       zip_safe=False,
       packages=['Ska', 'Ska.tdb', 'Ska.tdb.tests'],
-      package_dir={'Ska.tdb': 'Ska/tdb'},
       tests_require=['pytest'],
-      cmdclass={'test': PyTest}
+      cmdclass=cmdclass,
       )