Make the call to next() in algorithm iteration loop explicit (#2069)

---------

Signed-off-by: Margaret Duff <[email protected]>

Author: MargaretDuff

CHANGELOG.md

@@ -2,6 +2,10 @@
   - Bug fixes:
       - Fix deprecation warning for rtol and atol in GD (#2056)
       - Removed the deprecated usage of run method in test_SIRF.py (#2070)
+  - Enhancements:
+      - Made the call to next() in algorithm iteration loop explicit (#2069)
+      
+
 
 
 * 24.3.0

Wrappers/Python/cil/optimisation/algorithms/Algorithm.py

@@ -276,8 +276,9 @@ def run(self, iterations=None, callbacks: Optional[List[Callback]]=None, verbose
         self.max_iteration = self.iteration + iterations
         iters = (count(self.iteration) if np.isposinf(self.max_iteration)
                  else range(self.iteration, self.max_iteration))
-        for _ in zip(iters, self):
+        for _ in iters:
             try:
+                self.__next__()
                 for callback in callbacks:
                     callback(self)
             except StopIteration: