如何只获取字符串的特定“行”？

def get_specific_line(string, line_number):
    lines = string.splitlines()
    if line_number < 1 or line_number > len(lines):
        return "Invalid line number"
    return lines[line_number - 1]

# 示例用法
string = "第一行\n第二行\n第三行\n第四行"
line_number = 2
result = get_specific_line(string, line_number)
print(result)

第二行