remove custom gcd command since python2.7 is deprecated. testing resample. (#441)

test/test_transforms.py

@@ -321,10 +321,10 @@ class Tester(unittest.TestCase):
 
     def test_scriptmodule_Resample(self):
         tensor = torch.rand((2, 1000))
-        sample_rate = 100
-        sample_rate_2 = 50
+        sample_rate = 100.
+        sample_rate_2 = 50.
 
-        _test_script_module(transforms.Spectrogram, tensor, sample_rate, sample_rate_2)
+        _test_script_module(transforms.Resample, tensor, sample_rate, sample_rate_2)
 
     def test_batch_Resample(self):
         waveform = torch.randn(2, 2786)

torchaudio/compliance/kaldi.py

@@ -32,22 +32,6 @@ BLACKMAN = 'blackman'
 WINDOWS = [HAMMING, HANNING, POVEY, RECTANGULAR, BLACKMAN]
 
 
-def gcd(a, b):
-    # type: (int, int) -> int
-    """Calculate the Greatest Common Divisor of a and b.
-
-    Unless b==0, the result will have the same sign as b (so that when
-    b is divided by it, the result comes out positive).
-    """
-
-    try:
-        return math.gcd(a, b)
-    except AttributeError:
-        while b:
-            a, b = b, a % b
-        return a
-
-
 def _next_power_of_2(x):
     r"""Returns the smallest power of 2 that is greater than x
     """
@@ -749,7 +733,7 @@ def _get_LR_indices_and_weights(orig_freq, new_freq, output_samples_in_unit, win
 
 def _lcm(a, b):
     # type: (int, int) -> int
-    return abs(a * b) // gcd(a, b)
+    return abs(a * b) // math.gcd(a, b)
 
 
 def _get_num_LR_output_samples(input_num_samp, samp_rate_in, samp_rate_out):
@@ -826,7 +810,7 @@ def resample_waveform(waveform, orig_freq, new_freq, lowpass_filter_width=6):
 
     assert lowpass_cutoff * 2 <= min_freq
 
-    base_freq = gcd(int(orig_freq), int(new_freq))
+    base_freq = math.gcd(int(orig_freq), int(new_freq))
     input_samples_in_unit = int(orig_freq) // base_freq
     output_samples_in_unit = int(new_freq) // base_freq