Python可以打开的文件最大大小? [英] Max size of a file Python can open?

问题描述

我用Python打开了一个8 MB的文件，因为我想批量更改各种类型的文件名.我仔细检查并将文件加载到字符串中，然后使用字符串方法replace替换了所有内容.然后我注意到只有一半的文件被替换了.好像Python没有完全打开文件.

I opened an 8 MB file in Python, because I wanted to batch change various types of file names. I went through and loaded the file into a string and used the string method replace to replace everything. I then noticed that only half of the file was being replaced; as if Python wasn't fully opening the file.

我是否必须在Python的范围内播放某种字符串大小限制或最大文件大小限制?

Is there some kind of string size limit or max file size limit that I must play within the bounds of in Python?

请参考 Python搜索并替换未正确替换的代码.

我已更改为建议的代码.缓冲区是一个超过15万行的8 MB HTML文件.替换代码可以完美地工作；只是它并不能替代一切.又例如，一个令人痛苦的错误是:

I have changed to the suggested code. The buffer is an 8 MB HTML file that is over 150k lines. The replacement code works perfectly; it's just that it's not replacing everything. Or for example one error that is a pain is:

当我尝试将字符串ff10替换为FF-10时，它将更改为FF-010.

When I'm attempting to replace the string ff10 to FF-10, it'll be changed to FF-010.

推荐答案

否，Python可以打开的文件大小没有可达到的最大值.现代意义上8 MB是 tiny .你在某个地方犯了错误.

No, there is no reachable maximum on the size of a file Python can open. 8 MB is tiny in modern terms. You made a mistake somewhere.

人们经常将千兆字节数据加载到内存中.根据计算机的RAM(无论是64位还是32位操作系统和处理器)，在您获得MemoryError之前，实际的最大值可能在1GB以上.

People regularly load gigabytes of data into memory. Depending on your computer's RAM, whether it's 64- or 32- bit OS and processor, the practical maximum for you may be anywhere from 1 GB up before you get a MemoryError.

作为测试，我只是将一个350 MB的文件加载到一个字符串中.只花了几秒钟.然后，我将其写回到文件中.那花了一点时间.然后，我对文件进行了哈希处理.两者是相同的.

As a test, I just loaded a 350 MB file into a string. It took only a few seconds. I then wrote it back out to a file. That took a little longer. I then hashed the file. The two are identical.

Python的大型字符串没有问题，直到达到RAM，操作系统或处理器的极限为止.

Python has no problems with large strings, until you hit the limit of your RAM, operating system, or processor.

您说您遍历并将文件加载到字符串中" –听起来像您可能会犯错的第一个地方.要将文件加载到字符串中，只需执行fileobject.read().如果您以其他方式执行此操作，则可能是问题所在.

You say you "went through and loaded the file into a string" -- that sounds like the first place you could have made a mistake. To load a file into a string, you just do fileobject.read(). If you did it some other way, that could be the problem.

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