python复制大文件

file_read = open("readme", encoding="utf-8")
file_write = open("readme[复件]", encoding="utf-8", mode="w")

while True:
    # 读取
    text = file_read.read()

    # 判断是否读取到内容
    if not text:
        break

    # 写入
    file_write.write(text)

file_read.close()
file_write.close()