refactor as a package

sho/iters.py

@@ -0,0 +1,40 @@
+import sys
+
+########################################################################
+# Stopping criterions
+########################################################################
+
+def max(i, val, sol, nb_it):
+    if i < nb_it:
+        return True
+    else:
+        return False
+
+# Stopping criterions that are actually just checkpoints.
+
+def several(i, val, sol, agains):
+    """several  several stopping criterions in one."""
+    over = []
+    for again in agains:
+        over.append( again(i, val, sol) )
+    return all(over)
+
+
+def save(i, val, sol, filename="run.csv", fmt="{it} ; {val} ; {sol}\n"):
+    """Save all iterations to a file."""
+    # Append a line at the end of the file.
+    with open(filename.format(it=i), 'a') as fd:
+        fd.write( fmt.format(it=i, val=val, sol=sol) )
+    return True # No incidence on termination.
+
+
+def history(i, val, sol, history):
+    history.append((val,sol))
+    return True
+
+
+def log(i, val, sol, fmt="{it} {val}\n"):
+    """Print progress on stderr."""
+    sys.stderr.write( fmt.format(it=i, val=val) )
+    return True
+