Execute AquaMacs buffer that has "from __future__ import ..."

Question

Running AquaEmacs, I want to execute a buffer (C-c C-c) in Python.

The buffer starts with:

from __future__ import print_function

The execution in AquaEmacs starts with:

import sys,imp
if'test_one_liners' in sys.modules:
   imp.reload(test_one_liners)
else:
   import test_one_liners

where test_one_liners.py is my file. This gives this error:

 SyntaxError: from __future__ imports must occur at the beginning of the file

Anyone know where and how to fix this?

Let me add the information again to make it clear.

Create this buffer:

 from __future__ import print_function

 print("Hello")

Use File/Change Buffer Mode/Python to make it Python and C-c C-c to execute it; it need not be saved. The buffer is written to some temporary file and fails with SyntaxError: from __future__ imports must occur at the beginning of the file. The traceback includes a generated file which contains a reference to a temp file. What should happen instead it printing Hello.

Answer 1

This was a bug in python-mode.el which is fixed in the current release. It looks like aquamacs is bundled with an older version of python-mode.el.

The bug report is here: bug #1063884 and the fix here.

You should update your python-mode.el package.

Answer 2

1. You say from __future__ import print_function, but the error message talks about from __future__ imports --- Note the s at the end of that.

2. You say that " test_one_liners.py is my file". And you say that from __future__ import print_function is at the beginning of "the buffer". But the error messages says that it doesn't find that incantation at the beginning of file test_one_liners.py. Perhaps your current buffer, which has that incantation, is not for that file?

But if I had to guess, I'd guess the problem is the apparent typo in #1. ("Apparent", because you might just have mistyped the post, and the incantation might be correct in the file.)

Answer 3

As it was said, this is fixed in current trunk.

https://launchpad.net/python-mode

When checking your example, get "ImportError: No module named test_one_liners", which is to expect.

Second example prints nicely "Hello".