Read STDIN as bytes rather than a string

[Oscar Benjamin]

On 19 June 2012 00:53, Jason Friedman <jason at powerpull.net> wrote:

> Which leads me to another question ... how can I debug these things?
>
> $ echo 'hello' | python3 -m pdb ~/my-input.py
> > /home/jason/my-input.py(2)<module>()
> -> import sys
> (Pdb) *** NameError: name 'hello' is not defined
> --
> http://mail.python.org/mailman/listinfo/python-list
>

It's difficult to debug problems that are related to reading from stdin. I
don't know of any good way, so I just end up doing things like adding print
statements and checking the output rather than using a debugger. Tools like
hd can help with checking the input/output files that you're using. If
there were a debugger it would probably need to be one with a GUI - the
only one I know is spyder but I don't think that will allow you to pipe
anything on stdin.

One thing I wanted to say is that if your script is intended to work on
Windows you'll need to use msvcrt.setmode() to disable newline translation
on stdin (I haven't tested with Python 3.x, but it's definitely necessary
with Python 2.x). See Frazil's post here:
http://stackoverflow.com/questions/2850893/reading-binary-data-from-stdin
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