deal with index duplicateqs in the grid_search function

raiss/imputation_R2.py

@@ -96,9 +96,11 @@ def z_amplitude_effect(zscore_folder, masked_folder, output_folder, ref_folder,
     """
     z_file = "{0}/z_{1}_{2}.txt".format(zscore_folder, gwas, chrom)
     zscore = pd.read_csv(z_file, index_col=0, sep="\t")
+    zscore.drop_duplicates(keep='first', inplace=True)
     z_output = "{0}/z_{1}_{2}.txt".format(output_folder, gwas, chrom)
     dat_orig = pd.read_csv(z_file, sep="\t", index_col=0)
-
+    dat_orig.drop_duplicates(keep='first', inplace=True)
+    
     def run_imputation(z, i):
         print("Z score threshold : {}".format(z))
         condition = (dat_orig.Z.abs() > z)