Status: New
Owner: renato.c...@gmail.com
Labels: Type-Enhancement Priority-Medium
New issue 2406 by renato.c...@gmail.com: improve Tuple constructor
http://code.google.com/p/sympy/issues/detail?id=2406
I've just recently discovered Tuple and find it very useful, but there are
two things I would find useful when constructing a Tuple:
* Sympify the arguments. If Tuple is a container for Basic, it's natural
that all elements should be so. For instance, if you try:
Tuple(x, 1).subs(x, 0)
you get AttributeError: 'int' object has no attribute '_eval_subs'
* Behave more like the builtin tuple: automatically denest one level of
lists and tuples (if it's the only argument) and evaluate generators. What
you get now is:
Tuple(i for i in range(4))
Tuple(<generator object <genexpr> at 0x41e30a0>)
[instead of Tuple(0, 1, 2, 3)]
Tuple([x, y, z])
Tuple([x, y, z])
[instead of Tuple(x, y, z)]
This behavior is the same as always calling Tuple(*tuple(arg)) instead of
Tuple(arg).
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