在 python 中查找 utf-16 文件。如何？
由于某种原因，我无法查找我的 utf16 文件。它会产生“UnicodeException：UTF-16 流不以 BOM 开头”。我的代码：
f = codecs.open(ai_file, 'r', 'utf-16')
seek = self.ai_map[self._cbClass.Text] #seek is valid int
f.seek(seek)
while True:
ln = f.readline().strip()
我尝试了随机的东西，例如首先从流中读取某些内容，但没有帮助。我检查了使用十六进制编辑器寻求的偏移量 - 字符串从字符开始，而不是空字节（我猜这是个好兆头，对吧？） 那么如何在python中寻找utf-16呢？
For some reason i can not seek my utf16 file. It produces 'UnicodeException: UTF-16 stream does not start with BOM'. My code:
f = codecs.open(ai_file, 'r', 'utf-16')
seek = self.ai_map[self._cbClass.Text] #seek is valid int
f.seek(seek)
while True:
ln = f.readline().strip()
I tried random stuff like first reading something from stream, didnt help. I checked offset that is seeked to using hex editor - string starts at character, not null byte (i guess its good sign, right?)
So how to seek utf-16 in python?
如果你对这篇内容有疑问，欢迎到本站社区发帖提问 参与讨论，获取更多帮助，或者扫码二维码加入 Web 技术交流群。
绑定邮箱获取回复消息
由于您还没有绑定你的真实邮箱，如果其他用户或者作者回复了您的评论，将不能在第一时间通知您！
发布评论
评论（1）
好吧，错误消息告诉您原因：它没有读取字节顺序标记。字节顺序标记位于文件的开头。如果没有读取字节顺序标记，UTF-16 解码器就无法知道字节的顺序。显然，它是在您第一次读取时懒惰地执行此操作，而不是在您打开文件时执行此操作 - 否则它会假设
seek()正在启动一个新的 UTF-16 流。如果您的文件没有 BOM，这肯定是问题所在，您应该在打开文件时指定字节顺序（请参见下面的#2）。否则，我看到两种可能的解决方案：
在查找之前读取文件的前两个字节以获取 BOM。您似乎说这不起作用，表明它可能在查找后等待一个新的 UTF-16 流，因此：
使用
utf-16-le显式指定字节顺序或utf-16-be作为打开文件时的编码。Well, the error message is telling you why: it's not reading a byte order mark. The byte order mark is at the beginning of the file. Without having read the byte order mark, the UTF-16 decoder can't know what order the bytes are in. Apparently it does this lazily, the first time you read, instead of when you open the file -- or else it is assuming that the
seek()is starting a new UTF-16 stream.If your file doesn't have a BOM, that's definitely the problem and you should specify the byte order when opening the file (see #2 below). Otherwise, I see two potential solutions:
Read the first two bytes of the file to get the BOM before you seek. You seem to say this didn't work, indicating that perhaps it's expecting a fresh UTF-16 stream after the seek, so:
Specify the byte order explicitly by using
utf-16-leorutf-16-beas the encoding when you open the file.