reference solution

Author: dham

groups/groups.py

@@ -94,6 +94,7 @@ class CyclicGroup(Group):
 
     def _validate(self, value):
         """Ensure that value is a legitimate element value in this group."""
+        super()._validate(value)
         if not (isinstance(value, Integral) and 0 <= value < self.n):
             raise ValueError("Element value must be an integer"
                              f" in the range [0, {self.n})")
@@ -113,6 +114,7 @@ class GeneralLinearGroup(Group):
 
     def _validate(self, value):
         """Ensure that value is a legitimate element value in this group."""
+        super()._validate(value)
         value = np.asarray(value)
         if not (value.shape == (self.n, self.n)):
             raise ValueError("Element value must be a "

log_decorator/__init__.py

@@ -0,0 +1 @@
+from .log_decorator import log_call  # NoQA F401

log_decorator/log_decorator.py

@@ -0,0 +1,14 @@
+from functools import wraps
+import logging
+
+
+def log_call(func):
+    @wraps(func)
+    def fn(*args, **kwargs):
+        logging.info("Calling: " + func.__name__ + "("
+                     + ", ".join(
+                         [repr(a) for a in args]
+                         + [a + "=" + repr(v) for a, v in kwargs.items()]
+                     ) + ")")
+        return func(*args, **kwargs)
+    return fn