remove instance of class from stumpy module

Author: NimaSarajpoor

stumpy/sdp.py

@@ -327,10 +327,6 @@ def __call__(self, Q, T, n_threads=1, planning_flag="FFTW_ESTIMATE"):
         return irfft_obj.output_array[m - 1 : n]  # valid portion
 
 
-if PYFFTW_IS_AVAILABLE:  # pragma: no cover
-    _pyfftw_sliding_dot_product = _PYFFTW_SLIDING_DOT_PRODUCT(max_n=2**20)
-
-
 def _sliding_dot_product(Q, T):
     """
     Compute the sliding dot product between `Q` and `T`

tests/test_sdp.py

@@ -70,11 +70,13 @@
 
 def get_sdp_function_names():
     out = []
-    for func_name, func in inspect.getmembers(sdp, inspect.isfunction):
+    for func_name, _ in inspect.getmembers(sdp, inspect.isfunction):
         if func_name.endswith("sliding_dot_product"):
             out.append(func_name)
 
     if sdp.PYFFTW_IS_AVAILABLE:  # pragma: no cover
+        callable_obj = sdp._PYFFTW_SLIDING_DOT_PRODUCT(max_n=2**20)
+        setattr(sdp, "_pyfftw_sliding_dot_product", callable_obj)
         out.append("_pyfftw_sliding_dot_product")
 
     return out