On Thu, Jan 18, 2018 at 12:47 AM, Steven D'Aprano <steve+comp.lang.pyt...@pearwood.info> wrote: > On Wed, 17 Jan 2018 16:54:37 -0500, Larry Martell wrote: > >> The code that was receiving the >> PNG was not reading and writing the file as binary. Strangely that >> worked on Linux but not on Windows. > > Nothing strange about it -- on Unix and Linux systems (with the possible > exception of Mac OS?) in Python 2 there's no difference between text and > binary mode for ASCII-only files. In Python 2, strings are byte strings, > not Unicode, and reading from files returns such sequences of bytes. > > On Windows, reading from files in text mode treats \r\n as the end of > line, and converts[1] such \r\n pairs to \n; it also treats ^Z byte as > the end of file[2], or at least it used to back in the 2.5 or so days. I > haven't tested it in more recent versions. > > > [1] Technically this is a build-time option, but as far as I know it is > not just the default but pretty much universal. > > [2] https://blogs.msdn.microsoft.com/oldnewthing/20040316-00/?p=40233/
Thanks for the clarification. I have been programming since 1975 and thankfully have had very little exposure to Windows. -- https://mail.python.org/mailman/listinfo/python-list
