STY: Further simplification

Co-authored-by: Chris Markiewicz <[email protected]>

Author: DimitriPapadopoulos

nipype/interfaces/diffusion_toolkit/odf.py

@@ -100,10 +100,10 @@ def _create_gradient_matrix(self, bvecs_file, bvals_file):
         _gradient_matrix_file = "gradient_matrix.txt"
         with open(bvals_file) as bvals_f:
             bvals = bvals_f.readline().strip().split()
-        bvecs_x = list(re.split(r"\s+", bvecs_f.readline().strip()))
-        bvecs_y = list(re.split(r"\s+", bvecs_f.readline().strip()))
-        bvecs_z = list(re.split(r"\s+", bvecs_f.readline().strip()))
-        bvecs_f.close()
+        with open(bvecs_file) as bvecs_f:
+            bvecs_x = bvecs_f.readline().strip().split()
+            bvecs_y = bvecs_f.readline().strip().split()
+            bvecs_z = bvecs_f.readline().strip().split()
         gradient_matrix_f = open(_gradient_matrix_file, "w")
         for i in range(len(bvals)):
             if int(bvals[i]) == 0: