Add hollow_diamond_alphabet function for printing alphabet diamond patterns.

strings/hollow_diamond_alphabet.py

@@ -0,0 +1,83 @@
+def hollow_diamond_alphabet(n):
+ """
+ Prints a hollow diamond pattern using uppercase alphabet characters.
+
+ :param n: An integer representing the number of rows in the diamond.
+ :return: True if the pattern was successfully printed, False otherwise.
+ """
+ if not isinstance(n, int):
+ print("Error: Input must be an integer.")
+ return False
+
+ if n <= 0:
+ print("Error: Input must be a positive integer.")
+ return False
+
+ if n % 2 == 0:
+ print("Error: Input must be an odd integer.")
+ return False
+
+ # Calculate the number of rows for the upper half of the diamond
+ upper_rows = (n + 1) // 2
+
+ # Print the upper half of the diamond
+ for i in range(upper_rows):
+ char = chr(65 + i) # Convert number to uppercase alphabet
+ if i == 0:
+ print(" " * (upper_rows - 1) + char)
+ else:
+ print(" " * (upper_rows - i - 1) + char + " " * (2 * i - 1) + char)
+
+ # Print the lower half of the diamond
+ for i in range(upper_rows - 2, -1, -1):
+ char = chr(65 + i) # Convert number to uppercase alphabet
+ if i == 0:
+ print(" " * (upper_rows - 1) + char)
+ else:
+ print(" " * (upper_rows - i - 1) + char + " " * (2 * i - 1) + char)
+
+ return True
+
+
+def get_valid_input():
+ """
+ Prompts the user for input and validates it.
+
+ :return: A valid positive odd integer, or None if the user chooses to quit.
+ """
+ while True:
+ user_input = input(
+ "Enter the diamond size (positive odd integer) or 'q' to quit: "
+ )
+
+ if user_input.lower() == "q":
+ return None
+
+ try:
+ n = int(user_input)
+ if n > 0 and n % 2 != 0:
+ return n
+ elif n <= 0:
+ print("Error: Please enter a positive integer.")
+ else:
+ print("Error: Please enter an odd integer.")
+ except ValueError:
+ print("Error: Invalid input. Please enter a valid integer.")
+
+
+# Main program
+def main():
+ while True:
+ size = get_valid_input()
+ if size is None:
+ print("Thank you!")
+ break
+
+ if hollow_diamond_alphabet(size):
+ print("\nDiamond pattern printed successfully!")
+
+ print() # Add a blank line for better readability
+
+
+if __name__ == "__main__":
+ main()