added hook, fixed pep8 testing

Author: pancetta

pySDC/playgrounds/PinT_Workshop_2017/my_HookClass.py

@@ -0,0 +1,30 @@
+from __future__ import division
+from pySDC.core.Hooks import hooks
+
+
+class error_output(hooks):
+    """
+    Hook class to add output of error
+    """
+
+    def post_iteration(self, step, level_number):
+        """
+        Default routine called after each iteration
+        Args:
+            step: the current step
+            level_number: the current level number
+        """
+
+        super(error_output, self).post_iteration(step, level_number)
+
+        # some abbreviations
+        L = step.levels[level_number]
+        P = L.prob
+
+        L.sweep.compute_end_point()
+
+        uex = P.u_exact(step.time + step.dt)
+        err = abs(uex - L.uend)
+
+        print('--- Current error (vs. exact solution) at iteration %2i and time %4.2f: %6.4e' %
+              (step.status.iter, step.time, err))

pySDC/playgrounds/PinT_Workshop_2017/play_with_me.py

@@ -63,7 +63,7 @@ def main():
     Tend = 4.0
 
     # instantiate controller
-    controller = allinclusive_multigrid_nonMPI(num_procs=16, controller_params=controller_params,
+    controller = allinclusive_multigrid_nonMPI(num_procs=1, controller_params=controller_params,
                                                description=description)
 
     # get initial values on finest level
@@ -73,6 +73,8 @@ def main():
     # call main function to get things done...
     uend, stats = controller.run(u0=uinit, t0=t0, Tend=Tend)
 
+    # The following is used only for statistics and output, the main show is over now..
+
     # compute exact solution and compare
     uex = P.u_exact(Tend)
     err = abs(uex - uend)

pySDC/tests/test_pep8.py

@@ -4,7 +4,7 @@
 import nose.tools
 import pep8
 
-BASE_PATH = os.path.abspath(os.path.join(__file__, '..', '..'))
+BASE_PATH = os.path.abspath(os.path.join(__file__, '..', '..', '..'))
 
 
 def check_files(dir):
@@ -23,5 +23,5 @@ def check_files(dir):
 
 
 def test_pep8():
-    for dir in ['core', 'implementations', 'helpers', 'tutorial', '../projects', '../playgrounds']:
+    for dir in ['pySDC/core', 'pySDC/implementations', 'pySDC/helpers', 'pySDC/tutorial', 'pySDC/projects', 'pySDC/playgrounds']:
         yield check_files, dir