Finding nonprintable characters?

[John Baxter]

In article <mailman.1014145891.20575.python-list at python.org>,
 VanL <vlindberg at verio.net> wrote:

> isBinary(filehandle)

On Unix, you execute
   file the.unknown.file
and parse the result.

But that's not what you meant.

% file /etc/passwd
/etc/passwd: English text

% file /etc/ssh_host_rsa_key.pub
/etc/ssh_host_rsa_key.pub: ASCII text

% file /bin/sh
/bin/sh: Mach-O executable ppc

And so on, and on.

  --John