有没有一种python代码可以访问单元格的字母表并将其更改为excel中的相反字母表？

def excel_column_number(n):
    """Convert a column letter to a number."""
    result = 0
    for i in range(len(n)):
        result = result * 26 + (ord(n[i].upper()) - ord('A') + 1)
    return result

def excel_number_to_column_number(n):
    """Convert a number to the corresponding Excel column letter."""
    string = ""
    while n > 0:
        n, remainder = divmod(n - 1, 26)
        string = chr(65 + remainder) + string
    return string

def reverse_excel_column_letter(column_letter):
    """Reverse the Excel column letter."""
    column_number = excel_column_number(column_letter)
    reversed_column_number = 26 ** len(column_letter) - column_number
    return excel_number_to_column_number(reversed_column_number)

# Example usage:
original_column_letter = 'A'
reversed_column_letter = reverse_excel_column_letter(original_column_letter)
print(f"The reversed column letter for '{original_column_letter}' is '{reversed_column_letter}'")