fix flake8

Author: wq2012

simpleder/der.py

@@ -29,8 +29,6 @@ def check_input(hyp):
             raise TypeError("Start and end must be float numbers.")
         if element[1] > element[2]:
             raise ValueError("Start must not be larger than end.")
-    num_elements = len(hyp)
-
 
 
 def compute_total_length(hyp):
@@ -72,7 +70,7 @@ def compute_load_length(ref, hyp):
     maximum number of speakers at any given time point.
 
     Equation:
-        Load = \int max(N_ref(t), N_hyp(t)) dt
+        Load = \\int max(N_ref(t), N_hyp(t)) dt
 
     where N_ref(t) is the number of speakers in reference at time t, and
     N_hyp(t) is the number of speakers in hypothesis at time t.

tests/det_test.py

@@ -37,8 +37,6 @@ def test_wrong_speaker_type(self):
             der.check_input(hyp)
 
 
-
-
 class TestComputeIntersectionLength(unittest.TestCase):
     """Tests for the compute_intersection_length function."""
 
@@ -69,8 +67,6 @@ def test_example(self):
         self.assertEqual(8.0, der.compute_total_length(hyp))
 
 
-
-
 class TestComputeLoadLength(unittest.TestCase):
     """Tests for the compute_load_length function."""
 
@@ -266,8 +262,6 @@ def test_overlap_confusion(self):
         ref = [("A", 0.0, 1.0)]
         hyp = [("B", 0.0, 1.0)]
         # If A can map to B, DER is 0.
-        # But if we force mismatch? (hard to force with simple API unless labels differ globally)
-        # Here they just match A->B. DER=0.
         self.assertEqual(0.0, der.DER(ref, hyp))
 
     def test_overlap_confusion_enforced(self):