diff --git a/document-python-code-with-chatgpt/README.md b/document-python-code-with-chatgpt/README.md
new file mode 100644
index 0000000000..905694ee9b
--- /dev/null
+++ b/document-python-code-with-chatgpt/README.md
@@ -0,0 +1,3 @@
+# Document Your Python Code and Projects With ChatGPT
+
+This folder provides the code examples for the Real Python tutorial [Document Your Python Code and Projects With ChatGPT](https://realpython.com/document-python-code-with-chatgpt/).
diff --git a/document-python-code-with-chatgpt/circle.py b/document-python-code-with-chatgpt/circle.py
new file mode 100644
index 0000000000..d9940822e2
--- /dev/null
+++ b/document-python-code-with-chatgpt/circle.py
@@ -0,0 +1,56 @@
+"""Prompt
+Write NumPy-style docstrings for the following class and its methods:
+
+class Circle:
+    def __init__(self, radius):
+        self.radius = radius
+
+    def calculate_area(self):
+        return round(math.pi * self.radius ** 2, 2)
+"""
+
+import math
+
+
+# Output:
+class Circle:
+    """
+    A Circle class to perform some circle-related operations.
+
+    Parameters
+    ----------
+    radius : float
+        The radius of the circle.
+
+    Attributes
+    ----------
+    radius : float
+        The radius of the circle.
+
+    Methods
+    -------
+    calculate_area():
+        Calculates the area of the circle.
+    """
+
+    def __init__(self, radius):
+        """
+        Constructs all the necessary attributes for the circle object.
+
+        Parameters
+        ----------
+        radius : float
+            The radius of the circle.
+        """
+        self.radius = radius
+
+    def calculate_area(self):
+        """
+        Calculate the area of the circle.
+
+        Returns
+        -------
+        float
+            The area of the circle rounded to 2 decimal places.
+        """
+        return round(math.pi * self.radius**2, 2)
diff --git a/document-python-code-with-chatgpt/code_explanation.py b/document-python-code-with-chatgpt/code_explanation.py
new file mode 100644
index 0000000000..279269ff15
--- /dev/null
+++ b/document-python-code-with-chatgpt/code_explanation.py
@@ -0,0 +1,9 @@
+"""Prompt
+Explain how the following function works:
+
+def find_extremes(iterable):
+    data = tuple(iterable)
+    if len(data) == 0:
+        raise ValueError("input iterable must not be empty")
+    return min(data), max(data)
+"""
diff --git a/document-python-code-with-chatgpt/docstring_1.py b/document-python-code-with-chatgpt/docstring_1.py
new file mode 100644
index 0000000000..110858255a
--- /dev/null
+++ b/document-python-code-with-chatgpt/docstring_1.py
@@ -0,0 +1,12 @@
+""""Prompt
+Write a single-line docstring for the following function:
+
+def add(a, b):
+    return a + b
+"""
+
+
+# Output:
+def add(a, b):
+    """Return the sum of a and b."""
+    return a + b
diff --git a/document-python-code-with-chatgpt/docstring_2.py b/document-python-code-with-chatgpt/docstring_2.py
new file mode 100644
index 0000000000..b576d82858
--- /dev/null
+++ b/document-python-code-with-chatgpt/docstring_2.py
@@ -0,0 +1,71 @@
+"""Propmt
+Write a Google-style docstring for the following function:
+
+def add(a, b):
+    return a + b
+"""
+
+
+# Output:
+def add(a, b):
+    """Sum two numbers.
+
+    Args:
+        a (int or float): The first number.
+        b (int or float): The second number.
+
+    Returns:
+        int or float: The sum of the two numbers.
+    """
+    return a + b
+
+
+"""Prompt
+Write a Numpy-style docstring for the following function:
+
+def add(a, b):
+    return a + b
+"""
+
+
+# Output:
+def add_(a, b):
+    """
+    Sum two numbers.
+
+    Parameters
+    ----------
+    a : int or float
+        The first number to be added.
+    b : int or float
+        The second number to be added.
+
+    Returns
+    -------
+    int or float
+        The sum of a and b.
+    """
+    return a + b
+
+
+"""Prompt
+Write a Sphinx-style docstring for the following function:
+
+def add(a, b):
+    return a + b
+"""
+
+
+# Output:
+def add__(a, b):
+    """
+    Calculate the sum of two numbers.
+
+    :param a: The first number.
+    :type a: int or float
+    :param b: The second number.
+    :type b: int or float
+    :return: The sum of the two numbers.
+    :rtype: int or float
+    """
+    return a + b
diff --git a/document-python-code-with-chatgpt/doctest_tests.py b/document-python-code-with-chatgpt/doctest_tests.py
new file mode 100644
index 0000000000..4430d9a6bf
--- /dev/null
+++ b/document-python-code-with-chatgpt/doctest_tests.py
@@ -0,0 +1,39 @@
+"""Prompt
+Write a NumPy-style docstring for the following function.
+Add a section with usage examples as doctest tests:
+
+def add(a, b):
+    return a + b
+"""
+
+
+# Output:
+def add(a, b):
+    """
+    Add two numbers together.
+
+    This function takes two numbers (either integers or floats)
+    as arguments and returns their sum.
+
+    Parameters
+    ----------
+    a : int or float
+        The first number to add.
+    b : int or float
+        The second number to add.
+
+    Returns
+    -------
+    int or float
+        The sum of the two input numbers.
+
+    Examples
+    --------
+    >>> add(1, 2)
+    3
+    >>> add(5.5, 2.5)
+    8.0
+    >>> add(100, -50)
+    50
+    """
+    return a + b
diff --git a/document-python-code-with-chatgpt/interval.py b/document-python-code-with-chatgpt/interval.py
new file mode 100644
index 0000000000..168114869f
--- /dev/null
+++ b/document-python-code-with-chatgpt/interval.py
@@ -0,0 +1,30 @@
+"""Prompt
+Write a Google-style docstring for a function with the following signature:
+
+def in_interval(number, start, end):
+"""
+
+
+# Output:
+def in_interval(number, start, end):
+    """
+    Checks if a given number is within a specified interval.
+
+    This function takes three arguments: a number, and the start
+    and end points of an interval.
+    It checks whether the given number falls within the specified
+    interval or not.
+
+    Args:
+        number (int or float): The number to check.
+        start (int or float): The starting point of the interval.
+        end (int or float): The ending point of the interval.
+
+    Returns:
+        bool: True if the given number falls within the interval,
+        False otherwise.
+
+    Raises:
+        ValueError: If the start is larger than the end, or if
+        the number, start, or end are not numbers.
+    """
diff --git a/document-python-code-with-chatgpt/prime.py b/document-python-code-with-chatgpt/prime.py
new file mode 100644
index 0000000000..b7e9f21e1c
--- /dev/null
+++ b/document-python-code-with-chatgpt/prime.py
@@ -0,0 +1,27 @@
+"""Prompt
+Write a Google-style docstring for a function that takes an
+integer as an argument and determines whether it’s a prime
+number.
+"""
+
+
+# Output:
+def is_prime_number(n):
+    """
+    Determines if an input integer is a prime number.
+
+    This function takes an integer as an argument and checks
+    whether it is a prime number. A prime number is a
+    positive natural number greater than 1 that has no positive
+    integer divisors other than 1 and itself.
+
+    Args:
+        n (int): The integer to check.
+
+    Returns:
+        bool: True if the input integer is a prime number,
+        False otherwise.
+
+    Raises:
+        ValueError: If n is less than or equal to 1.
+    """
diff --git a/document-python-code-with-chatgpt/usage_examples.py b/document-python-code-with-chatgpt/usage_examples.py
new file mode 100644
index 0000000000..3db413ab8c
--- /dev/null
+++ b/document-python-code-with-chatgpt/usage_examples.py
@@ -0,0 +1,9 @@
+"""Prompt
+Write three usage examples for the following function.
+Add explanations to each example:
+
+def is_divisible(a, b):
+    if not a % b:
+        return True
+    return False
+"""
diff --git a/python-type-hints-multiple-types/01_type_hints_for_one_piece_of_data.py b/python-type-hints-multiple-types/01_type_hints_for_one_piece_of_data.py
new file mode 100644
index 0000000000..8da0a92531
--- /dev/null
+++ b/python-type-hints-multiple-types/01_type_hints_for_one_piece_of_data.py
@@ -0,0 +1,16 @@
+def parse_email(email_address: str) -> str | None:
+    if "@" in email_address:
+        username, domain = email_address.split("@")
+        return username
+    return None
+
+
+# %% Python 3.9 and earlier
+
+# from typing import Union
+#
+# def parse_email(email_address: str) -> Union[str, None]:
+#     if "@" in email_address:
+#         username, domain = email_address.split("@")
+#         return username
+#     return None
diff --git a/python-type-hints-multiple-types/02_type_hints_for_multiple_pieces_of_data.py b/python-type-hints-multiple-types/02_type_hints_for_multiple_pieces_of_data.py
new file mode 100644
index 0000000000..c0bfc13a70
--- /dev/null
+++ b/python-type-hints-multiple-types/02_type_hints_for_multiple_pieces_of_data.py
@@ -0,0 +1,16 @@
+def parse_email(email_address: str) -> tuple[str, str] | None:
+    if "@" in email_address:
+        username, domain = email_address.split("@")
+        return username, domain
+    return None
+
+
+# %% Python 3.9 and earlier
+
+# from typing import Tuple, Union
+#
+# def parse_email(email_address: str) -> Union[Tuple[str, str], None]:
+#     if "@" in email_address:
+#         username, domain = email_address.split("@")
+#         return username, domain
+#     return None
diff --git a/python-type-hints-multiple-types/03_type_hints_for_callback.py b/python-type-hints-multiple-types/03_type_hints_for_callback.py
new file mode 100644
index 0000000000..d65ee6df33
--- /dev/null
+++ b/python-type-hints-multiple-types/03_type_hints_for_callback.py
@@ -0,0 +1,19 @@
+from collections.abc import Callable
+from typing import ParamSpec, TypeVar
+
+P = ParamSpec("P")
+T = TypeVar("T")
+
+
+def apply_func(func: Callable[P, T], *args: P.args, **kwargs: P.kwargs) -> T:
+    return func(*args, **kwargs)
+
+
+def parse_email(email_address: str) -> tuple[str, str]:
+    if "@" in email_address:
+        username, domain = email_address.split("@")
+        return username, domain
+    return "", ""
+
+
+apply_func(parse_email, "claudia@realpython.com")
diff --git a/python-type-hints-multiple-types/04_type_hints_for_factory_function.py b/python-type-hints-multiple-types/04_type_hints_for_factory_function.py
new file mode 100644
index 0000000000..c2b8afc52c
--- /dev/null
+++ b/python-type-hints-multiple-types/04_type_hints_for_factory_function.py
@@ -0,0 +1,31 @@
+import functools
+import time
+from collections.abc import Callable
+from typing import ParamSpec, TypeVar
+
+P = ParamSpec("P")
+T = TypeVar("T")
+
+
+def timeit(function: Callable[P, T]) -> Callable[P, T]:
+    @functools.wraps(function)
+    def wrapper(*args: P.args, **kwargs: P.kwargs):
+        start = time.perf_counter()
+        result = function(*args, **kwargs)
+        end = time.perf_counter()
+        print(f"{function.__name__}() finished in {end - start:.10f}s")
+        return result
+
+    return wrapper
+
+
+@timeit
+def parse_email(email_address: str) -> tuple[str, str]:
+    if "@" in email_address:
+        username, domain = email_address.split("@")
+        return username, domain
+    return "", ""
+
+
+username, domain = parse_email("claudia@realpython.com")
+print(username, domain)
diff --git a/python-type-hints-multiple-types/05_type_hints_for_generator.py b/python-type-hints-multiple-types/05_type_hints_for_generator.py
new file mode 100644
index 0000000000..fab68bd2ef
--- /dev/null
+++ b/python-type-hints-multiple-types/05_type_hints_for_generator.py
@@ -0,0 +1,37 @@
+from collections.abc import Generator, Iterator
+
+
+def parse_email() -> Generator[tuple[str, str], str, str]:
+    sent = yield "", ""
+    while sent != "":
+        if "@" in sent:
+            username, domain = sent.split("@")
+            sent = yield username, domain
+        else:
+            sent = yield "ERROR", "invalid email"
+    return "Done"
+
+
+generator = parse_email()
+next(generator)
+generator.send("claudia@realpython.com")
+generator.send("realpython")
+try:
+    generator.send("")
+except StopIteration as ex:
+    print(ex.value)
+
+
+def parse_emails(emails: list[str]) -> Iterator[tuple[str, str]]:
+    for email in emails:
+        if "@" in email:
+            username, domain = email.split("@")
+            yield username, domain
+
+
+# from collections.abc import Iterable
+# def parse_emails(emails: Iterable[str]) -> Iterable[tuple[str, str]]:
+#     for email in emails:
+#         if "@" in email:
+#             username, domain = email.split("@")
+#             yield username, domain
diff --git a/python-type-hints-multiple-types/06_type_aliases.py b/python-type-hints-multiple-types/06_type_aliases.py
new file mode 100644
index 0000000000..880fdd8cbb
--- /dev/null
+++ b/python-type-hints-multiple-types/06_type_aliases.py
@@ -0,0 +1,11 @@
+from typing import TypeAlias
+
+
+EmailComponents: TypeAlias = tuple[str, str] | None
+
+
+def parse_email(email_address: str) -> EmailComponents:
+    if "@" in email_address:
+        username, domain = email_address.split("@")
+        return username, domain
+    return None
diff --git a/python-type-hints-multiple-types/07_static_type_checking.py b/python-type-hints-multiple-types/07_static_type_checking.py
new file mode 100644
index 0000000000..9204b2f70d
--- /dev/null
+++ b/python-type-hints-multiple-types/07_static_type_checking.py
@@ -0,0 +1,5 @@
+def parse_email(email_address: str) -> tuple[str, str] | None:
+    if "@" in email_address:
+        username, domain = email_address.split("@")
+        return username, domain
+    return None
diff --git a/python-type-hints-multiple-types/README.md b/python-type-hints-multiple-types/README.md
new file mode 100644
index 0000000000..2b3cdc3a6e
--- /dev/null
+++ b/python-type-hints-multiple-types/README.md
@@ -0,0 +1,17 @@
+# How to Use Type Hints for Multiple Return Types in Python
+
+This folder contains sample code for the [How to Use Type Hints for Multiple Return Types in Python](https://realpython.com/python-type-hints-multiple-types/) tutorial on Real Python.
+
+## Installation
+
+Some of the code requires the following third-party library:
+
+- [`mypy`](https://pypi.org/project/mypy/)
+
+To install it into a [virtual environment](https://realpython.com/python-virtual-environments-a-primer/), type the following commands:
+
+```shell
+$ python3 -m venv venv/
+$ source venv/bin/activate
+(venv) $ python -m pip install -r requirements.txt
+```
diff --git a/python-type-hints-multiple-types/requirements.txt b/python-type-hints-multiple-types/requirements.txt
new file mode 100644
index 0000000000..01bdb66600
--- /dev/null
+++ b/python-type-hints-multiple-types/requirements.txt
@@ -0,0 +1,3 @@
+mypy==1.5.1
+mypy-extensions==1.0.0
+typing_extensions==4.8.0