居中相乘字符串，不打印空行Python 3

def multiply_strings(str1, str2):
    result = ""
    for char1 in str1:
        for char2 in str2:
            result += char1 + char2 + " "
    return result.strip()

def print_centered_multiplication(str1, str2):
    multiplied_str = multiply_strings(str1, str2)
    lines = multiplied_str.split(" ")
    max_length = max(len(line) for line in lines)
    for line in lines:
        print(line.center(max_length))

# 示例调用
str1 = "ABC"
str2 = "123"
print_centered_multiplication(str1, str2)

A1 A2 A3 B1 B2 B3 C1 C2 C3