Message 336565 - Python tracker

➜

This issue tracker has been migrated to GitHub, and is currently read-only.
For more information, see the GitHub FAQs in the Python's Developer Guide.

Author	steven.daprano
Recipients	ngie, steven.daprano
Date	2019-02-25.22:33:23
SpamBayes Score	-1.0
Marked as misclassified	Yes
Message-id	<1551134003.15.0.800749101559.issue36111@roundup.psfhosted.org>
In-reply-to

Content
I believe you will find that this is because you opened the file in text mode, which means Unicode, not bytes. If you open it in binary mode, the POSIX spec applies: py> fp = open("sample", "rb"); fp.seek(-100, os.SEEK_END) 350 Supported values for seeking in text (Unicode) files are documented here: https://docs.python.org/3/library/io.html#io.TextIOBase.seek I don't believe this is a bug, or possible to be changed. Do you still think otherwise? If not, we should close this ticket.

I believe you will find that this is because you opened the file in text mode, which means Unicode, not bytes. If you open it in binary mode, the POSIX spec applies:

py> fp = open("sample", "rb"); fp.seek(-100, os.SEEK_END)
350

Supported values for seeking in text (Unicode) files are documented here:

https://docs.python.org/3/library/io.html#io.TextIOBase.seek

I don't believe this is a bug, or possible to be changed. Do you still think otherwise? If not, we should close this ticket.

History
Date	User	Action	Args
2019-02-25 22:33:23	steven.daprano	set	recipients: + steven.daprano, ngie
2019-02-25 22:33:23	steven.daprano	set	messageid: <1551134003.15.0.800749101559.issue36111@roundup.psfhosted.org>
2019-02-25 22:33:23	steven.daprano	link	issue36111 messages
2019-02-25 22:33:23	steven.daprano	create