Cool program I made

import re

def calculate_numbers_in_braces(string):
  """
  Calculates the sum of all numbers within curly braces {} in a given string.

  Args:
    string: The input string.

  Returns:
    The sum of all numbers found within curly braces.
  """

  numbers_str = re.findall(r'\{([^}]+)\}', string)
  total = 0
  for num_str in numbers_str:
    try:
      numbers = [int(x) for x in num_str.split(',')]
      total += sum(numbers)
    except ValueError:
      print(f"Error: Invalid number format in '{num_str}'")
  return total

# Example usage:
string = "{1,2,3}"
result = calculate_numbers_in_braces(string)
print(result)  # Output: 6