Add ascii_to_char.py to conversions module

Author: Alessio Falcini

conversions/ascii_to_char.py

@@ -0,0 +1,169 @@
+"""Convert ASCII integer values to their corresponding characters."""
+
+
+def ascii_to_char(ascii_value: int) -> str:
+    """
+    Convert an ASCII integer value to its corresponding character.
+
+    Args:
+        ascii_value: An integer representing an ASCII value (0-127 for standard ASCII,
+                     0-255 for extended ASCII)
+
+    Returns:
+        str: The character corresponding to the ASCII value
+
+    Raises:
+        TypeError: If ascii_value is not an integer
+        ValueError: If ascii_value is outside the valid ASCII range (0-255)
+
+    Examples:
+        >>> ascii_to_char(65)
+        'A'
+        >>> ascii_to_char(97)
+        'a'
+        >>> ascii_to_char(48)
+        '0'
+        >>> ascii_to_char(32)
+        ' '
+        >>> ascii_to_char(72)
+        'H'
+        >>> ascii_to_char(33)
+        '!'
+        >>> ascii_to_char(126)
+        '~'
+        >>> ascii_to_char(0)
+        '\\x00'
+        >>> ascii_to_char(255)
+        'ÿ'
+        >>> ascii_to_char(-1)
+        Traceback (most recent call last):
+            ...
+        ValueError: ASCII value must be between 0 and 255
+        >>> ascii_to_char(256)
+        Traceback (most recent call last):
+            ...
+        ValueError: ASCII value must be between 0 and 255
+        >>> ascii_to_char("65")
+        Traceback (most recent call last):
+            ...
+        TypeError: ASCII value must be an integer
+        >>> ascii_to_char(65.5)
+        Traceback (most recent call last):
+            ...
+        TypeError: ASCII value must be an integer
+    """
+    if not isinstance(ascii_value, int):
+        raise TypeError("ASCII value must be an integer")
+
+    if not 0 <= ascii_value <= 255:
+        raise ValueError("ASCII value must be between 0 and 255")
+
+    return chr(ascii_value)
+
+
+def string_to_ascii(text: str) -> list[int]:
+    """
+    Convert a string to a list of ASCII values.
+
+    Args:
+        text: A string to convert
+
+    Returns:
+        list[int]: List of ASCII values for each character in the string
+
+    Raises:
+        TypeError: If text is not a string
+
+    Examples:
+        >>> string_to_ascii("Hello")
+        [72, 101, 108, 108, 111]
+        >>> string_to_ascii("ABC")
+        [65, 66, 67]
+        >>> string_to_ascii("123")
+        [49, 50, 51]
+        >>> string_to_ascii("")
+        []
+        >>> string_to_ascii(123)
+        Traceback (most recent call last):
+            ...
+        TypeError: Input must be a string
+    """
+    if not isinstance(text, str):
+        raise TypeError("Input must be a string")
+
+    return [ord(char) for char in text]
+
+
+def ascii_list_to_string(ascii_list: list[int]) -> str:
+    """
+    Convert a list of ASCII values back to a string.
+
+    Args:
+        ascii_list: A list of integers representing ASCII values
+
+    Returns:
+        str: The string formed by converting each ASCII value to its character
+
+    Raises:
+        TypeError: If ascii_list is not a list or contains non-integer values
+        ValueError: If any ASCII value is outside the valid range (0-255)
+
+    Examples:
+        >>> ascii_list_to_string([72, 101, 108, 108, 111])
+        'Hello'
+        >>> ascii_list_to_string([65, 66, 67])
+        'ABC'
+        >>> ascii_list_to_string([49, 50, 51])
+        '123'
+        >>> ascii_list_to_string([])
+        ''
+        >>> ascii_list_to_string([65, "66", 67])
+        Traceback (most recent call last):
+            ...
+        TypeError: All elements must be integers
+        >>> ascii_list_to_string([65, 256, 67])
+        Traceback (most recent call last):
+            ...
+        ValueError: ASCII value must be between 0 and 255
+        >>> ascii_list_to_string("not a list")
+        Traceback (most recent call last):
+            ...
+        TypeError: Input must be a list
+    """
+    if not isinstance(ascii_list, list):
+        raise TypeError("Input must be a list")
+
+    result = []
+    for value in ascii_list:
+        if not isinstance(value, int):
+            raise TypeError("All elements must be integers")
+        if not 0 <= value <= 255:
+            raise ValueError("ASCII value must be between 0 and 255")
+        result.append(chr(value))
+
+    return "".join(result)
+
+
+if __name__ == "__main__":
+    import doctest
+
+    doctest.testmod()
+
+    print("ASCII to Character Converter")
+    print("Enter an ASCII value (0-255) or 'q' to quit:")
+
+    while True:
+        user_input = input("\nASCII value: ").strip()
+
+        if user_input.lower() == "q":
+            print("Goodbye!")
+            break
+
+        try:
+            ascii_val = int(user_input)
+            char = ascii_to_char(ascii_val)
+            print(f"Character: '{char}'")
+        except ValueError as e:
+            print(f"Error: {e}")
+        except TypeError as e:
+            print(f"Error: {e}")