`builtins.file` is not available in Py3 and does not need an import in
Py2.

Encoding fix for chappy writing its temp JO file.

Scott Snyder authored 5 years ago and Walter Lampl committed 5 years ago

 - Coerce iterator to list.
 - fileno

Also need to make sure `file' is explicitly defined as a local
if we're assigning it on any arm of a conditional;
can't just rely on finding it as a builtin.

 - string.translate no longer exists.
 - __builtin__ -> builtins
 - types module
 - need to open temp file in text mode

 - basestring
 - file
 - reduce
 - apply
 - raw_input
 - execfile
 - cmp
 - unicode

python3 fixes for ChapPy:
  - Backwards compatibility for `basestring'.
  - Text/binary output fix.
  

Scott Snyder authored 5 years ago and Edward Moyse committed 5 years ago

Initial python3 port.  Not intended to fix everything now; only what's
needed for basic athena/configuration jobs.

Add a flake8 unit test and make the python code compliant.


Former-commit-id: 51bdb0ef