Add amended version of 4.3 with performance reporting and some fixes.

ch-13/4.3-monte-carlo_perf/robot/performance_counter.py

@@ -0,0 +1,85 @@
+import time
+
+
+class PerformanceCounter:
+    def __init__(self):
+        self.count = 0
+        self.total_time = 0
+        self.start_time = 0
+    
+    def start(self):
+        self.start_time = time.monotonic()
+    
+    def stop(self):
+        end = time.monotonic()
+        self.total_time += (end - self.start_time)
+        self.count += 1
+
+    def per_call(self):
+        return self.total_time / self.count
+    
+    def total_call_time(self):
+        return self.total_time
+    
+    def call_count(self):
+        return self.count
+    
+    def performance_line(self):
+        return f"Calls: {self.count}, Total time: {self.total_time} s, Per call: {self.per_call()}"
+
+
+# class PerformanceCounterDecorator:
+#     def __init__(self, fn):
+#         self.count = 0
+#         self.total_time = 0
+#         self.fn = fn
+    
+#     def __call__(self, *args, **kwargs):
+#         start = time.monotonic()
+#         try:
+#             print(f"Calling method with {args}, {kwargs}")
+#             return self.fn(*args, **kwargs)
+#         finally:
+#             end = time.monotonic()
+#             self.total_time += (end - start)
+#             self.count += 1
+            
+#     def per_call(self):
+#         return self.total_time / self.count
+    
+#     def total_call_time(self):
+#         return self.total_time
+    
+#     def call_count(self):
+#         return self.count
+    
+#     def performance_line(self):
+#         return f"Calls: {self.count}, Total time: {self.total_time} s, Per call: {self.per_call()}"
+
+
+# @PerformanceCounter
+# def slow_printer(stuff):
+#     print(f"Hello, {stuff}")
+#     time.sleep(0.05)
+#     return "hello"
+
+# class SomeClass:
+#     def __init__(self, stuff):
+#         self.stuff = stuff
+        
+#     @PerformanceCounter
+#     def test(self, more_stuff):
+#         print(self.stuff, more_stuff)
+#         return 5
+
+# result = slow_printer("first_thing")
+# print(f"result is {result}")
+# # for n in range(1000):
+# #    slow_printer("first_thing")
+# #    slow_printer("second_thing")
+# print(slow_printer.performance_line())
+
+# some_instance = SomeClass("foo")
+# result = some_instance.test("bar")
+# print(result)
+# print(SomeClass.test.performance_line())