some refactoring

code/util.py

@@ -0,0 +1,39 @@
+class PrintingObject:
+
+    class SilenceSignal():
+        def __init__(self, obj, value):
+            self.obj = obj
+            self.new_silent = value
+        def __enter__(self):
+            self.old_silent = self.obj.get_silence()
+            self.obj.set_silence(self.new_silent)
+        def __exit__(self, exception_type, exception_value, traceback):
+            self.obj.set_silence(self.old_silent)
+    
+    def __init__(self):
+        self.silent = True
+    
+    def is_silent(self):
+        return self.silent
+    
+    def get_silence(self):
+        return self.is_silent()
+    
+    def set_silence(self, value=True):
+        self.silent = value
+        return self
+    
+    def unset_silence(self):
+        self.silent = False
+        return self
+        
+    def with_silence(self, value=True):
+        self.set_silence(value)
+        return self
+        
+    def silence(self, value=True):
+        return self.__class__.SilenceSignal(self, value)
+        
+    def _print(self, *args, **kwargs):
+        if not self.silent:
+            print(*args, **kwargs)