Added more test files from lectures.

test17.py

@@ -0,0 +1,46 @@
+class Test:
+    a = [1,2,3,4,5]
+
+    a1 = 1
+    def __init__(self) -> None:
+        pass
+
+    def sentiment(self):
+        pass
+
+    def __getattr__(self, str):
+        print(f"DEBUG: attempt to access attr {str}")
+        if int(str[1]) > 0 and int(str[1]) < 6:
+            return self.a[int(str[1])]
+
+    def c():
+        print(f"DEBUG: {c.__self__=}")
+        
+    def i(self):
+        pass
+        #print(f"DEBUG: {i.__self__=}")
+
+class ChildTest(Test):
+    pass
+
+if __name__ == '__main__':
+    def whoami(who):
+        if isinstance(Test.c(), Test):
+            print("It's a Test!")
+        if isinstance(ChildTest.c(), ChildTest):
+            print("It's a ChildTest!")
+
+    test = Test()
+    childtest = ChildTest()
+    test.sentiment
+    whoami(test)
+    whoami(childtest)
+    print(f"{test.a1}")
+    print(f"{hasattr(test, 'sentiment')}")
+
+    print(f"{test.c=}")
+    print(f"{childtest.c=}")
+    test.i()
+
+    #print(test['1099'][2019][3])
+    #print(test.1099_2019_3)