relax SVN archive

Created a base class for the user function classes.

This defines the __init__() method for creating the relax help string.

Updated the 2to3 checklist for the idioms.

Added a module containing functions for checking user function args.

So far this includes:
check.is_bool()
check.is_int()
check.is_str()

The Python 2.x idioms have been removed.

This was done with the python 2.x to 3.x script with the commands:
2to3 -w -f exec relax .

The change is in preparation for Python 3.0, and relax still works with Python versions 2.4, 2.5,
and 2.6.

The changes include:
1) The call to type() has been replaced with isinstance().
2) "while 1" has been replaced with "while True".
3) list sort methods x.sort() have been replaced with a call to sorted(x).

Booleans are instances of int, so the user function argument unit tests will be a massive mess!

Added a text file documenting the changes in preparation for Python 3.x.

The execfile statement has been replaced with a call to the exec(compile()) function.

This was done with the python 2.x to 3.x script with the commands:
2to3 -w -f exec relax .

The change is in preparation for Python 3.0, and relax still works with Python versions 2.4, 2.5,
and 2.6. The syntax has changed from:

execfile(script_file, local)

to:

exec(compile(open(script_file).read(), script_file, 'exec'), local)

Hmmm, not much of a language simplification!

The exec statement has been replaced with a call to the exec() function.

This was done with the python 2.x to 3.x script with the commands:
2to3 -w -f exec relax .

The change is in preparation for Python 3.0, and relax still works with Python versions 2.4, 2.5,
and 2.6.

The dictionary keys() return value is now converted into a list.

This was done with the python 2.x to 3.x script with the commands:
2to3 -w -f dict relax .

The change is in preparation for Python 3.0, and relax still works with Python versions 2.4, 2.5,
and 2.6.

Renamed the pipe.list() user function to pipe.display().

Modified the behaviour of raise statements according to http://www.python.org/dev/peps/pep-3109/.

This was done with the python 2.x to 3.x script with the commands:
2to3 -w -f raise relax .

The change is in preparation for Python 3.0, and relax still works with Python versions 2.4, 2.5,
and 2.6.