Added repr for Recalibrate base class

test/calibration_tests.py

@@ -12,8 +12,9 @@ class TestBaseClass(unittest.TestCase):
         del self.model
 
     def test_repr(self):
-        expected = 'Recalibrate(prefix={})'.format('recalib_')
+        expected = 'Recalibrate(prefix={})'.format('\'recalib_\'')
         actual = repr(self.model)
+        print(expected)
         self.assertEqual(expected, actual)
 
     def test_calibration_factor(self):

tupak/gw/calibration.py

@@ -22,7 +22,7 @@ class Recalibrate(object):
         self.prefix = prefix
 
     def __repr__(self):
-        return self.__class__.__name__ + '(prefix={})'.format(self.prefix)
+        return self.__class__.__name__ + '(prefix=\'{}\')'.format(self.prefix)
 
     def get_calibration_factor(self, frequency_array, **params):
         """Apply calibration model