Add option to use two sample tests from hypothesis_classical for p va…

…lue (#542)

Adds option to parent of origin effect class to use either
srivastava_yanagihara or srivastava two sample tests for fitting p value

python/python/bystro/rare_variant/parent_of_origin.py

@@ -50,6 +50,10 @@
     QuadraticInverseShrinkage,
 )
 from bystro.random_matrix_theory.rmt4ds_cov_test import two_sample_cov_test
+from bystro.covariance.hypothesis_classical import (
+    srivastavayanagihara_two_sample_test,
+    srivastava_two_sample_test,
+)
 
 
 class BasePOE:
@@ -290,6 +294,16 @@ def fit(
             elif self.pval_method == "rmt4ds":
                 result = two_sample_cov_test(X_heterozygotes, X_homozygotes)
                 self.p_val = result["p_value"]
+            elif self.pval_method == "srivastavayanagihara":
+                result = srivastavayanagihara_two_sample_test(
+                    [X_heterozygotes, X_homozygotes]
+                )
+                self.p_val = result["p_value"]
+            elif self.pval_method == "srivastava":
+                result = srivastava_two_sample_test(
+                    [X_heterozygotes, X_homozygotes]
+                )
+                self.p_val = result["p_value"]
             else:
                 raise ValueError(
                     "Unrecognized p value option %s" % self.pval_method