删除字符串中以某些字符开头的行

def delete_lines_startswith(string, characters):
    lines = string.split('\n')  # 将字符串按行分割成列表
    lines = [line for line in lines if not line.startswith(characters)]  # 删除以指定字符开头的行
    result = '\n'.join(lines)  # 将剩余的行重新组合成字符串
    return result

string = '''
Hello
World
This is a test
Goodbye
'''
characters = 'H'
result = delete_lines_startswith(string, characters)
print(result)

World
This is a test
Goodbye