Avoid using __del__

ImageIterator.py

@@ -188,7 +188,7 @@ class ImageIterator():
         self.printer.dec()
         self.printer.print_str("Plotting QOI…")
 
-        qoi_printer.__del__() #MG20190702: Not needed, right?
+        qoi_printer.close()
         commandline  = "gnuplot -e \"set terminal pdf noenhanced;"
         commandline += " set output '"+qoi_filebasename+".pdf';"
         commandline += " set grid;"

ImageSeries.py

@@ -8,8 +8,6 @@
 ###                                                                          ###
 ################################################################################
 
-# from builtins     import *
-
 import dolfin
 import glob
 

NonlinearSolver.py

@@ -159,7 +159,7 @@ class NonlinearSolver():
         self.printer.dec()
 
         if (self.write_iterations):
-            self.frame_printer.__del__() #MG20190702: Not needed, right?
+            self.frame_printer.close()
             commandline  = "gnuplot -e \"set terminal pdf noenhanced;"
             commandline += " set output '"+self.frame_filebasename+".pdf';"
             commandline += " set key box textcolor variable;"

Problem_ImageRegistration.py

@@ -45,9 +45,9 @@ class ImageRegistrationProblem(Problem):
 
 
 
-    def __del__(self):
+    def close(self):
 
-        self.printer.__del__() #MG20190702: Not needed, right?
+        self.printer.close()
 
 
 

fedic2.py

@@ -169,3 +169,5 @@ def fedic2(
             "initialize_DU_with_DUold":initialize_DU_with_DUold})
 
     image_iterator.iterate()
+
+    problem.close()