why uses tempfile.mktemp() "@" ?

[Jeff Epler]

I'm not sure why "@" was chosen, but I've never had any problems with
it.  I searched within the bash manual, and the only special meaning for
@ is when it is used as a variable name in a substitution ("$@"), as a
subscript in a substitution ("${name[@]}"), or when extglob is set, when
followed by an open-paren ("@(a|b|c)").  @ also has special meaning when
using tab-completion, but this shouldn't come into play.

You can probably change the behavior at runtime with something like
this:
>>> import tempfile, os
>>> def gettempprefix():
...         return "_%r-" % os.getpid()
... 
>>> tempfile.gettempprefix = gettempprefix
>>> tempfile.mktemp()
'/tmp/_21830-0'

Jeff
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