拆分并删除字符串中的整行

def split_and_remove_lines(input_string):
    lines = input_string.split('\n')  # 按行拆分字符串
    result = ''

    for line in lines:
        if should_remove_line(line):  # 判断是否需要删除该行
            continue
        result += line + '\n'  # 拼接新的字符串

    return result

def should_remove_line(line):
    # 在这里可以添加判断条件，根据具体需求决定是否删除该行
    # 示例中假设删除包含特定关键字的行
    keywords = ['delete', 'remove', 'discard']
    for keyword in keywords:
        if keyword in line:
            return True
    return False

# 示例输入字符串
input_string = '''
This is the first line.
Please delete this line.
Keep this line.
Remove this line as well.
'''

# 调用函数进行拆分并删除整行操作
output_string = split_and_remove_lines(input_string)

print(output_string)