From 21b38b3d640bccc75dc29dc00ef4981dcc984fb8 Mon Sep 17 00:00:00 2001
From: Leodanis Pozo Ramos <lpozor78@gmail.com>
Date: Thu, 13 Mar 2025 17:37:00 +0100
Subject: [PATCH 1/5] Sample code for the article on `.__dict__`

---
 python-dict-attribute/README.md            |  3 ++
 python-dict-attribute/class_inheritance.py | 16 +++++++++++
 python-dict-attribute/config_v1.py         | 16 +++++++++++
 python-dict-attribute/config_v2.py         | 21 ++++++++++++++
 python-dict-attribute/config_v3.py         | 21 ++++++++++++++
 python-dict-attribute/demo.py              | 11 ++++++++
 python-dict-attribute/fibonacci.py         | 27 ++++++++++++++++++
 python-dict-attribute/person_v1.py         | 22 +++++++++++++++
 python-dict-attribute/person_v2.py         | 26 ++++++++++++++++++
 python-dict-attribute/record.py            | 32 ++++++++++++++++++++++
 python-dict-attribute/track_calls.py       | 10 +++++++
 11 files changed, 205 insertions(+)
 create mode 100644 python-dict-attribute/README.md
 create mode 100644 python-dict-attribute/class_inheritance.py
 create mode 100644 python-dict-attribute/config_v1.py
 create mode 100644 python-dict-attribute/config_v2.py
 create mode 100644 python-dict-attribute/config_v3.py
 create mode 100644 python-dict-attribute/demo.py
 create mode 100644 python-dict-attribute/fibonacci.py
 create mode 100644 python-dict-attribute/person_v1.py
 create mode 100644 python-dict-attribute/person_v2.py
 create mode 100644 python-dict-attribute/record.py
 create mode 100644 python-dict-attribute/track_calls.py

diff --git a/python-dict-attribute/README.md b/python-dict-attribute/README.md
new file mode 100644
index 0000000000..5f0914c2b4
--- /dev/null
+++ b/python-dict-attribute/README.md
@@ -0,0 +1,3 @@
+# Using Python's `.__dict__` to Work With Attributes
+
+This folder provides the code examples for the Real Python tutorial [Using Python's `.__dict__` to Work With Attributes](https://realpython.com/python-dict-attribute/).
diff --git a/python-dict-attribute/class_inheritance.py b/python-dict-attribute/class_inheritance.py
new file mode 100644
index 0000000000..a7282faa4d
--- /dev/null
+++ b/python-dict-attribute/class_inheritance.py
@@ -0,0 +1,16 @@
+class Parent:
+    def __init__(self):
+        self.parent_attr = "parent"
+
+
+class Child(Parent):
+    def __init__(self):
+        super().__init__()
+        self.child_attr = "child"
+
+
+parent = Parent()
+print(parent.__dict__)
+
+child = Child()
+print(child.__dict__)
diff --git a/python-dict-attribute/config_v1.py b/python-dict-attribute/config_v1.py
new file mode 100644
index 0000000000..f5e06f1f86
--- /dev/null
+++ b/python-dict-attribute/config_v1.py
@@ -0,0 +1,16 @@
+class Config:
+    def __init__(self, **kwargs):
+        self.__dict__.update(kwargs)
+
+    update = __init__
+
+    def __str__(self):
+        return str(self.__dict__)
+
+
+config = Config(theme="light", font_size=12, language="English")
+print(config)
+
+user = {"theme": "dark", "font_size": 14, "language": "Spanish"}
+config.update(**user)
+print(config)
diff --git a/python-dict-attribute/config_v2.py b/python-dict-attribute/config_v2.py
new file mode 100644
index 0000000000..22405b7633
--- /dev/null
+++ b/python-dict-attribute/config_v2.py
@@ -0,0 +1,21 @@
+class Config:
+    def __init__(self, name):
+        self.name = name
+
+    def set_option(self, key, value):
+        setattr(self, key, value)
+
+    def get_option(self, key):
+        return getattr(self, key, None)
+
+    def remove_option(self, key):
+        if hasattr(self, key):
+            delattr(self, key)
+            print(f"'{key}' removed!")
+        else:
+            print(f"'{key}' does not exist.")
+
+    def clear(self):
+        for key in list(self.__dict__.keys()):
+            delattr(self, key)
+        print("All options removed!")
diff --git a/python-dict-attribute/config_v3.py b/python-dict-attribute/config_v3.py
new file mode 100644
index 0000000000..f09f2db32e
--- /dev/null
+++ b/python-dict-attribute/config_v3.py
@@ -0,0 +1,21 @@
+class Config:
+    def __init__(self, name):
+        self.name = name
+
+    def set_option(self, key, value):
+        setattr(self, key, value)
+
+    def get_option(self, key):
+        return getattr(self, key, None)
+
+    def remove_option(self, key):
+        if key in self.__dict__:
+            delattr(self, key)
+            print(f"'{key}' removed!")
+        else:
+            print(f"'{key}' does not exist.")
+
+    def clear(self):
+        for key in self.__dict__:
+            delattr(self, key)
+        print("All options removed!")
diff --git a/python-dict-attribute/demo.py b/python-dict-attribute/demo.py
new file mode 100644
index 0000000000..db71bc9113
--- /dev/null
+++ b/python-dict-attribute/demo.py
@@ -0,0 +1,11 @@
+class DemoClass:
+    class_attr = "This is a class attribute"
+
+    def __init__(self):
+        self.instance_attr = "This is an instance attribute"
+
+    def method(self):
+        return "This is a method"
+
+
+print(DemoClass.__dict__)
diff --git a/python-dict-attribute/fibonacci.py b/python-dict-attribute/fibonacci.py
new file mode 100644
index 0000000000..f194c2d157
--- /dev/null
+++ b/python-dict-attribute/fibonacci.py
@@ -0,0 +1,27 @@
+import time
+
+
+def fibonacci_of_v1(n):
+    if n <= 1:
+        return n
+    return fibonacci_of_v1(n - 1) + fibonacci_of_v1(n - 2)
+
+
+start = time.perf_counter()
+fibonacci_of_v1(35)
+end = time.perf_counter()
+print(f"{end - start:.3f} seconds")
+
+
+def fibonacci_of_v2(n):
+    cache = fibonacci_of_v2.__dict__.setdefault("cache", {})
+    if n in cache:
+        return cache[n]
+    cache[n] = n if n <= 1 else fibonacci_of_v2(n - 1) + fibonacci_of_v2(n - 2)
+    return cache[n]
+
+
+start = time.perf_counter()
+fibonacci_of_v2(35)
+end = time.perf_counter()
+print(f"{end - start:.3f} seconds")
diff --git a/python-dict-attribute/person_v1.py b/python-dict-attribute/person_v1.py
new file mode 100644
index 0000000000..6f620d7fb2
--- /dev/null
+++ b/python-dict-attribute/person_v1.py
@@ -0,0 +1,22 @@
+class Person:
+    def __init__(self, first_name, last_name, age):
+        self.first_name = first_name
+        self.last_name = last_name
+        self.age = age
+
+    def __str__(self):
+        return "{first_name} {last_name} is {age} years old".format(
+            **self.__dict__
+        )
+
+    def __repr__(self):
+        return "{cls}('{first_name}', '{last_name}', {age})".format(
+            cls=type(self).__name__,
+            **self.__dict__,
+        )
+
+    def as_dict(self):
+        return self.__dict__
+
+    def as_tuple(self):
+        return tuple(self.__dict__.values())
diff --git a/python-dict-attribute/person_v2.py b/python-dict-attribute/person_v2.py
new file mode 100644
index 0000000000..c9738e43be
--- /dev/null
+++ b/python-dict-attribute/person_v2.py
@@ -0,0 +1,26 @@
+class Person:
+    def __init__(self, first_name, last_name, age):
+        self.first_name = first_name
+        self.last_name = last_name
+        self.age = age
+
+    def __str__(self):
+        return "{first_name} {last_name} is {age} years old".format(
+            **self.__dict__
+        )
+
+    def __repr__(self):
+        return "{cls}('{first_name}', '{last_name}', {age})".format(
+            cls=type(self).__name__,
+            **self.__dict__,
+        )
+
+    def as_dict(self):
+        return self.__dict__
+
+    def as_tuple(self):
+        return tuple(self.__dict__.values())
+
+    def from_dict(self, data):
+        self.__dict__.update(data)
+        return self
diff --git a/python-dict-attribute/record.py b/python-dict-attribute/record.py
new file mode 100644
index 0000000000..f5dfc82d06
--- /dev/null
+++ b/python-dict-attribute/record.py
@@ -0,0 +1,32 @@
+import logging
+
+logging.basicConfig(level=logging.INFO, format="%(message)s")
+
+
+class Record:
+    def __init__(self, **fields):
+        logging.info(f"[INIT] Creating record with fields: {fields}")
+        self.__dict__.update(fields)
+
+    def __getattribute__(self, key):
+        if key == "__dict__":
+            return super().__getattribute__(key)
+        value = super().__getattribute__(key)
+        logging.info(f"[GET] Accessing '{key}' → {value}")
+        return value
+
+    def __setattr__(self, key, value):
+        if key in self.__dict__:
+            logging.info(f"[UPDATE] Modifying '{key}' → {value}")
+        else:
+            logging.info(f"[SET] Creating '{key}' → {value}")
+        self.__dict__[key] = value
+
+    def __delattr__(self, key):
+        if key in self.__dict__:
+            logging.info(f"[DEL] Deleting '{key}'")
+            del self.__dict__[key]
+        else:
+            logging.warning(
+                f"[DEL] Attempted to delete non-existent field '{key}'"
+            )
diff --git a/python-dict-attribute/track_calls.py b/python-dict-attribute/track_calls.py
new file mode 100644
index 0000000000..6dea659fb0
--- /dev/null
+++ b/python-dict-attribute/track_calls.py
@@ -0,0 +1,10 @@
+def track_calls():
+    track_calls.__dict__["calls"] = track_calls.__dict__.get("calls", 0) + 1
+    print(f"Calls {track_calls.calls}")
+
+
+track_calls()
+track_calls()
+track_calls()
+
+print(track_calls.calls)

From a2fdcaa3cc40a02cb149611d6135062e93cb0f90 Mon Sep 17 00:00:00 2001
From: martin-martin <breuss.martin@gmail.com>
Date: Sun, 16 Mar 2025 16:39:54 +0100
Subject: [PATCH 2/5] Add prints and missing code files, apply edits

---
 python-dict-attribute/config_v3.py    |  4 ++--
 python-dict-attribute/person_v1.py    |  7 +++++++
 python-dict-attribute/plain_record.py | 26 ++++++++++++++++++++++++++
 python-dict-attribute/salary.py       | 14 ++++++++++++++
 4 files changed, 49 insertions(+), 2 deletions(-)
 create mode 100644 python-dict-attribute/plain_record.py
 create mode 100644 python-dict-attribute/salary.py

diff --git a/python-dict-attribute/config_v3.py b/python-dict-attribute/config_v3.py
index f09f2db32e..22405b7633 100644
--- a/python-dict-attribute/config_v3.py
+++ b/python-dict-attribute/config_v3.py
@@ -9,13 +9,13 @@ def get_option(self, key):
         return getattr(self, key, None)
 
     def remove_option(self, key):
-        if key in self.__dict__:
+        if hasattr(self, key):
             delattr(self, key)
             print(f"'{key}' removed!")
         else:
             print(f"'{key}' does not exist.")
 
     def clear(self):
-        for key in self.__dict__:
+        for key in list(self.__dict__.keys()):
             delattr(self, key)
         print("All options removed!")
diff --git a/python-dict-attribute/person_v1.py b/python-dict-attribute/person_v1.py
index 6f620d7fb2..8c178779ff 100644
--- a/python-dict-attribute/person_v1.py
+++ b/python-dict-attribute/person_v1.py
@@ -20,3 +20,10 @@ def as_dict(self):
 
     def as_tuple(self):
         return tuple(self.__dict__.values())
+
+
+person = Person("John", "Doe", 30)
+print(repr(person))
+print(person)
+print(person.as_dict())
+print(person.as_tuple())
diff --git a/python-dict-attribute/plain_record.py b/python-dict-attribute/plain_record.py
new file mode 100644
index 0000000000..e4e7a808c7
--- /dev/null
+++ b/python-dict-attribute/plain_record.py
@@ -0,0 +1,26 @@
+class Record:
+    """Hold a record of data."""
+
+
+john = {
+    "name": "John Doe",
+    "position": "Python Developer",
+    "department": "Engineering",
+    "salary": 80000,
+    "hire_date": "2020-01-01",
+    "is_manager": False,
+}
+
+
+def as_dict(self):
+    return self.__dict__
+
+
+Record.as_dict = as_dict
+print(Record.__dict__)
+
+john_record = Record()
+john_record.__dict__.update(john)
+print(john_record.name)
+print(john_record.department)
+print(john_record.as_dict())
diff --git a/python-dict-attribute/salary.py b/python-dict-attribute/salary.py
new file mode 100644
index 0000000000..9b503d423c
--- /dev/null
+++ b/python-dict-attribute/salary.py
@@ -0,0 +1,14 @@
+class Employee:
+    def __init__(self, name, department, salary):
+        self.name = name
+        self.department = department
+        self.salary = salary
+
+    def give_raise(self, amount):
+        self.salery = self.salary + amount  # Typo here: self.salery
+
+
+john = Employee("John", "Engineering", 70000)
+john.give_raise(5000)
+print(john.salary)
+print(john.__dict__)

From 8935e904b63cd5eae9cc315bb9d26161aa831a7b Mon Sep 17 00:00:00 2001
From: Leodanis Pozo Ramos <lpozor78@gmail.com>
Date: Mon, 17 Mar 2025 15:26:55 +0100
Subject: [PATCH 3/5] TR updates, first round

---
 python-dict-attribute/config_v2.py            | 23 +++++++++++-----
 python-dict-attribute/demo.py                 |  2 ++
 .../{person_v1.py => person.py}               | 11 ++++----
 python-dict-attribute/person_v2.py            | 26 -------------------
 python-dict-attribute/plain_record.py         | 26 -------------------
 5 files changed, 25 insertions(+), 63 deletions(-)
 rename python-dict-attribute/{person_v1.py => person.py} (81%)
 delete mode 100644 python-dict-attribute/person_v2.py
 delete mode 100644 python-dict-attribute/plain_record.py

diff --git a/python-dict-attribute/config_v2.py b/python-dict-attribute/config_v2.py
index 22405b7633..954a8368d6 100644
--- a/python-dict-attribute/config_v2.py
+++ b/python-dict-attribute/config_v2.py
@@ -3,19 +3,30 @@ def __init__(self, name):
         self.name = name
 
     def set_option(self, key, value):
-        setattr(self, key, value)
+        self.__dict__[key] = value
 
     def get_option(self, key):
-        return getattr(self, key, None)
+        return self.__dict__.get(key, None)
 
     def remove_option(self, key):
-        if hasattr(self, key):
-            delattr(self, key)
+        if key in self.__dict__:
+            del self.__dict__[key]
+            # self.__dict__.pop(key)
             print(f"'{key}' removed!")
         else:
             print(f"'{key}' does not exist.")
 
     def clear(self):
-        for key in list(self.__dict__.keys()):
-            delattr(self, key)
+        self.__dict__.clear()
         print("All options removed!")
+
+
+conf = Config("GUI App")
+conf.set_option("theme", "dark")
+conf.set_option("size", "200x400")
+print(conf.__dict__)
+conf.remove_option("size")
+print(conf.__dict__)
+# conf.remove_option("autosave")  # Raises KeyError
+conf.clear()
+print(conf.__dict__)
diff --git a/python-dict-attribute/demo.py b/python-dict-attribute/demo.py
index db71bc9113..bf80310209 100644
--- a/python-dict-attribute/demo.py
+++ b/python-dict-attribute/demo.py
@@ -9,3 +9,5 @@ def method(self):
 
 
 print(DemoClass.__dict__)
+demo_object = DemoClass()
+print(demo_object.__dict__)
diff --git a/python-dict-attribute/person_v1.py b/python-dict-attribute/person.py
similarity index 81%
rename from python-dict-attribute/person_v1.py
rename to python-dict-attribute/person.py
index 8c178779ff..53618d3df1 100644
--- a/python-dict-attribute/person_v1.py
+++ b/python-dict-attribute/person.py
@@ -22,8 +22,9 @@ def as_tuple(self):
         return tuple(self.__dict__.values())
 
 
-person = Person("John", "Doe", 30)
-print(repr(person))
-print(person)
-print(person.as_dict())
-print(person.as_tuple())
+john = Person("John", "Doe", 30)
+print(repr(john))
+Person("John", "Doe", 30)
+print(john)
+print(john.as_dict())
+print(john.as_tuple())
diff --git a/python-dict-attribute/person_v2.py b/python-dict-attribute/person_v2.py
deleted file mode 100644
index c9738e43be..0000000000
--- a/python-dict-attribute/person_v2.py
+++ /dev/null
@@ -1,26 +0,0 @@
-class Person:
-    def __init__(self, first_name, last_name, age):
-        self.first_name = first_name
-        self.last_name = last_name
-        self.age = age
-
-    def __str__(self):
-        return "{first_name} {last_name} is {age} years old".format(
-            **self.__dict__
-        )
-
-    def __repr__(self):
-        return "{cls}('{first_name}', '{last_name}', {age})".format(
-            cls=type(self).__name__,
-            **self.__dict__,
-        )
-
-    def as_dict(self):
-        return self.__dict__
-
-    def as_tuple(self):
-        return tuple(self.__dict__.values())
-
-    def from_dict(self, data):
-        self.__dict__.update(data)
-        return self
diff --git a/python-dict-attribute/plain_record.py b/python-dict-attribute/plain_record.py
deleted file mode 100644
index e4e7a808c7..0000000000
--- a/python-dict-attribute/plain_record.py
+++ /dev/null
@@ -1,26 +0,0 @@
-class Record:
-    """Hold a record of data."""
-
-
-john = {
-    "name": "John Doe",
-    "position": "Python Developer",
-    "department": "Engineering",
-    "salary": 80000,
-    "hire_date": "2020-01-01",
-    "is_manager": False,
-}
-
-
-def as_dict(self):
-    return self.__dict__
-
-
-Record.as_dict = as_dict
-print(Record.__dict__)
-
-john_record = Record()
-john_record.__dict__.update(john)
-print(john_record.name)
-print(john_record.department)
-print(john_record.as_dict())

From 70c3858d80ea4ecb2d0e47ea303bc450107526b5 Mon Sep 17 00:00:00 2001
From: martin-martin <breuss.martin@gmail.com>
Date: Wed, 19 Mar 2025 13:09:48 +0100
Subject: [PATCH 4/5] Add output, colons, and remove obsolete line

---
 python-dict-attribute/config_v3.py   | 12 ++++++++++++
 python-dict-attribute/person.py      |  1 -
 python-dict-attribute/record.py      | 16 ++++++++++++++++
 python-dict-attribute/track_calls.py |  2 +-
 4 files changed, 29 insertions(+), 2 deletions(-)

diff --git a/python-dict-attribute/config_v3.py b/python-dict-attribute/config_v3.py
index 22405b7633..5a86eb8b97 100644
--- a/python-dict-attribute/config_v3.py
+++ b/python-dict-attribute/config_v3.py
@@ -19,3 +19,15 @@ def clear(self):
         for key in list(self.__dict__.keys()):
             delattr(self, key)
         print("All options removed!")
+
+
+conf = Config("GUI App")
+conf.set_option("theme", "dark")
+conf.set_option("size", "200x400")
+print(conf.__dict__)
+conf.remove_option("size")
+print(conf.__dict__)
+conf.remove_option("autosave")  # Raises KeyError
+print(conf.__dict__)
+conf.clear()
+print(conf.__dict__)
diff --git a/python-dict-attribute/person.py b/python-dict-attribute/person.py
index 53618d3df1..1640edb917 100644
--- a/python-dict-attribute/person.py
+++ b/python-dict-attribute/person.py
@@ -24,7 +24,6 @@ def as_tuple(self):
 
 john = Person("John", "Doe", 30)
 print(repr(john))
-Person("John", "Doe", 30)
 print(john)
 print(john.as_dict())
 print(john.as_tuple())
diff --git a/python-dict-attribute/record.py b/python-dict-attribute/record.py
index f5dfc82d06..6c770ab5fc 100644
--- a/python-dict-attribute/record.py
+++ b/python-dict-attribute/record.py
@@ -30,3 +30,19 @@ def __delattr__(self, key):
             logging.warning(
                 f"[DEL] Attempted to delete non-existent field '{key}'"
             )
+
+
+jane = Record(first_name="Jane", last_name="Doe", age=25)
+
+# Access
+print(jane.first_name)
+print(jane.age)
+
+# Mutations
+jane.age = 26
+jane.job = "Software Engineer"
+print(jane.__dict__)
+
+# Deletion
+del jane.age
+print(jane.__dict__)
diff --git a/python-dict-attribute/track_calls.py b/python-dict-attribute/track_calls.py
index 6dea659fb0..a2e529f894 100644
--- a/python-dict-attribute/track_calls.py
+++ b/python-dict-attribute/track_calls.py
@@ -1,6 +1,6 @@
 def track_calls():
     track_calls.__dict__["calls"] = track_calls.__dict__.get("calls", 0) + 1
-    print(f"Calls {track_calls.calls}")
+    print(f"Calls: {track_calls.calls}")
 
 
 track_calls()

From c3075b2efe2013c819d2aedbf527d37c088c7e3c Mon Sep 17 00:00:00 2001
From: martin-martin <breuss.martin@gmail.com>
Date: Wed, 19 Mar 2025 13:13:02 +0100
Subject: [PATCH 5/5] Add line, remove incorrect message

---
 python-dict-attribute/config_v2.py | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/python-dict-attribute/config_v2.py b/python-dict-attribute/config_v2.py
index 954a8368d6..aff8422edd 100644
--- a/python-dict-attribute/config_v2.py
+++ b/python-dict-attribute/config_v2.py
@@ -27,6 +27,7 @@ def clear(self):
 print(conf.__dict__)
 conf.remove_option("size")
 print(conf.__dict__)
-# conf.remove_option("autosave")  # Raises KeyError
+conf.remove_option("autosave")
+print(conf.__dict__)
 conf.clear()
 print(conf.__dict__)