Add materials

Author: martin-martin

python312-error-messages/README.md

@@ -0,0 +1,6 @@
+# Python 3.12 Preview: Ever Better Error Messages
+
+This repository contains script files with code examples shown in the Real Python tutorial [Python 3.12 Preview: Ever Better Error Messages](https://realpython.com/python312-error-messages/).
+
+The examples support the tutorial text.
+

python312-error-messages/decoder.py

@@ -0,0 +1,12 @@
+from this import d
+
+message = "Gunaxf sbe nyy gur nqqrq pynevgl va reebe zrffntrf, Cnoyb!"
+
+decoded_message = ""
+for character in message:
+    if character.isalpha():
+        decoded_message += d.get(character, "")
+    else:
+        decoded_message += character
+
+print(decoded_message)

python312-error-messages/encoder.py

@@ -0,0 +1,14 @@
+from this import d
+
+message = "Thanks for all the added clarity in error messages, Pablo!"
+
+reverse_cypher_dict = {value: key for key, value in d.items()}
+
+encoded_message = ""
+for character in message:
+    if character.isalpha():
+        encoded_message += reverse_cypher_dict.get(character, "")
+    else:
+        encoded_message += character
+
+print(encoded_message)

python312-error-messages/local_self.py

@@ -0,0 +1,20 @@
+import inspect
+
+
+class Greeter:
+    def __init__(self):
+        self.message = "Hello"
+
+    def greet(self, whom="World"):
+        frame = inspect.currentframe()
+        wrong_name = "message"
+
+        if "self" in frame.f_locals:
+            self = frame.f_locals["self"]
+            if hasattr(self, wrong_name):
+                raise NameError(
+                    f"name '{wrong_name}' is not defined. Did you mean: 'self.{wrong_name}'?"
+                )
+
+
+Greeter().greet()