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"""

应用： 文件的备份copy

"""

old_file = open("Test.txt", "r")

result = old_file.readlines()

print(result)

# for循环开始进行copy写入

new_file = open("Test(附件).txt", "w")

for line in result:

new_file.write(line)

old_file.close()

new_file.close()

"""

上面的例子直接readlines()，并不是完美的copy方法

如果文件过大，一点点的读取写入，内存问题，防止电脑变卡

在读取的时候，可以按行读取或者按照公司的字节读取（2014）

"""