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All:

I've been playing with "Lua" and found something really cool that I'm
unable to do in "Python". With "Lua", a script can be compiled to byte
code using "luac" and by adding "#!/usr/bin/lua" at the top of the
binary, the byte code becomes a single file executable. After I found
this trick, I ran back to "Python" to give it a try. Well... it
didn't work. Is this possible? There are tools which insert "python"
and related modules inside the byte code, but this is not the
requirement for this situation. The required solution is to insert "#!/
usr/bin/python" (or some string) at the top of a *.pyc byte code file
and run it as standalone executable. I'm excited about the
possibility and interested in hearing your thoughts.

Thank you,
Christopher Smiga

> I've been playing with "Lua" and found something really cool that I'm
> unable to do in "Python". With "Lua", a script can be compiled to byte
> code using "luac" and by adding "#!/usr/bin/lua" at the top of the
> binary, the byte code becomes a single file executable. After I found
> this trick, I ran back to "Python" to give it a try. Well... it
> didn't work. Is this possible?

In Python, a different approach will work, depending on the operating
system.

E.g. on Linux, you can use binfmt_misc to make executables out of pyc
code. Run

import imp,sys,string
magic = string.join(["\\x%.2x" % ord(c) for c in imp.get_magic()],"")
reg = 'yc:M::%s::%s:' % (magic, sys.executable)
open("/proc/sys/fs/binfmt_misc/register","wb").write(reg)

once on your Linux system (or, rather, at boot time), and all pyc
files become executable (if the x bit is set).

In Debian, installing the binfmt-support package will do that for
you.

Do "ls /proc/sys/fs/binfmt_misc/" to see what binary types are
already supported on your system.

HTH,
Martin

P.S. The approach you present for Lua indeed does not work for
Python.

On Jan 14, 5:33*pm, "Martin v. Loewis" <mar...@v.loewis.de> wrote:
> > I've been playing with "Lua" and found something really cool that I'm
> > unable to do in "Python". With "Lua", a script can be compiled to byte
> > code using "luac" and by adding "#!/usr/bin/lua" at the top of the
> > binary, the byte code becomes a single file executable. After I found
> > this trick, I ran back to "Python" to give it a try. *Well... *it
> > didn't work. Is this possible?
>
> In Python, a different approach will work, depending on the operating
> system.
>
> E.g. on Linux, you can use binfmt_misc to make executables out of pyc
> code. Run
>
> import imp,sys,string
> magic = string.join(["\\x%.2x" % ord(c) for c in imp.get_magic()],"")
> reg = 'yc:M::%s::%s:' % (magic, sys.executable)
> open("/proc/sys/fs/binfmt_misc/register","wb").write(reg)
>
> once on your Linux system (or, rather, at boot time), and all pyc
> files become executable (if the x bit is set).
>
> In Debian, installing the binfmt-support package will do that for
> you.
>
> Do "ls /proc/sys/fs/binfmt_misc/" to see what binary types are
> already supported on your system.
>
> HTH,
> Martin
>
> P.S. The approach you present for Lua indeed does not work for
> Python.


Martin,

This works great! Do you or anyone else have information on how to do
the same thing for Windows and/or Solaris.

Thank you again,
Christopher

On 01/15/10 09:33, Martin v. Loewis wrote:
>
> P.S. The approach you present for Lua indeed does not work for
> Python.

Actually the approach should work, though with a little workaround; you
can write your wrapper (e.g. #!/usr/bin/mypython) that simply strips the
first line and pass the file to the real python interpreter
(/usr/bin/python or whatever).

And I think it would be trivial to patch python interpreter to support
loading of #!-ed .pyc.

> This works great! Do you or anyone else have information on how to do
> the same thing for Windows and/or Solaris.

On Windows, just associate the .pyc extension with Python - the standard
installation will already do that.

On Solaris, I don't think something like this is supported.

Regards,
Martin

On Jan 14, 10:55*pm, epsilon <cesm...@gmail.com> wrote:
> All:
>
> I've been playing with "Lua" and found something really cool that I'm
> unable to do in "Python". With "Lua", a script can be compiled to byte
> code using "luac" and by adding "#!/usr/bin/lua" at the top of the
> binary, the byte code becomes a single file executable. After I found
> this trick, I ran back to "Python" to give it a try. *Well... *it
> didn't work. Is this possible?

You can't add a string on top of a pyc file but you can add one in a
zipped file. For an example, see http://www.noah.org/wiki/Python_zip_exe

On Jan 15, 8:32*am, schmeii <maxischm...@gmail.com> wrote:
> On Jan 14, 10:55*pm, epsilon <cesm...@gmail.com> wrote:
>
> > All:
>
> > I've been playing with "Lua" and found something really cool that I'm
> > unable to do in "Python". With "Lua", a script can be compiled to byte
> > code using "luac" and by adding "#!/usr/bin/lua" at the top of the
> > binary, the byte code becomes a single file executable. After I found
> > this trick, I ran back to "Python" to give it a try. *Well... *it
> > didn't work. Is this possible?
>
> You can't add a string on top of a pyc file but you can add one in a
> zipped file. For an example, seehttp://www.noah.org/wiki/Python_zip_exe


All:

Thanks again and I'm looking at all the options for different
operating system

Christopher