From f8fcef7aa02bb6b50dc5753d0a6e5113555a606f Mon Sep 17 00:00:00 2001
From: Holger Kohr <ho.kohr@zoho.com>
Date: Tue, 13 Mar 2018 22:40:45 +0100
Subject: [PATCH] BUG: avoid circular import in default_functionals

---
 odl/solvers/functional/default_functionals.py | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/odl/solvers/functional/default_functionals.py b/odl/solvers/functional/default_functionals.py
index 58da2b626db..4bfb97a6bc6 100644
--- a/odl/solvers/functional/default_functionals.py
+++ b/odl/solvers/functional/default_functionals.py
@@ -26,7 +26,6 @@
     proximal_convex_conj_l1_l2, proximal_convex_conj_l2, proximal_huber,
     proximal_l1, proximal_l1_l2, proximal_l2, proximal_l2_squared)
 from odl.space import ProductSpace
-from odl.ufunc_ops import exp
 from odl.util import (
     REPR_PRECISION, conj_exponent, moveaxis, npy_printoptions, repr_string,
     signature_string_parts)
@@ -1779,6 +1778,8 @@ def _call(self, x):
     @property
     def gradient(self):
         """Gradient operator of the functional."""
+        # Avoid circular import
+        from odl.ufunc_ops import exp
         if self.prior is None:
             return exp(self.domain)
         else: