On Sun, Oct 19, 2014 at 12:34 AM, Duane Nykamp <[email protected]> wrote: > Given changes with booleans as discussed in > https://groups.google.com/forum/#!topic/sympy/82ls0doW6Nk, I'm trying to > develop a new approach to testing the number of True's in Tuple. > > With earlier versions of sympy, if > thelist=Tuple(False, True, False) > the following worked > sum(thelist)==1 > Now, I'm trying to use the condition > thelist.count(True)==1 > with parse_expr. > > The following works as expected > > In [25]: parse_expr("(True,False,False).count(True)==1", > transformations=(auto_symbol, auto_number, split_symbols)) > Out[25]: True > > but, if I add implicit_multiplication, it breaks. > > In [26]: parse_expr("(True,False,False).count(True)==1", > transformations=(auto_symbol, auto_number, split_symbols, > implicit_multiplication)) > --------------------------------------------------------------------------- > [snip] > TypeError: unsupported operand type(s) for *: 'builtin_function_or_method' > and 'bool' > > I don't suppose there is a way to get implicit_multiplication to realize > that .count() is a function and it shouldn't replace the function > application with a multiplication.
I'd consider this to be a bug. Aaron Meurer > > Or are there better ways of determining the number of True's in the Tuple > using parse_expr? > > Thanks, > Duane > > -- > You received this message because you are subscribed to the Google Groups > "sympy" group. > To unsubscribe from this group and stop receiving emails from it, send an > email to [email protected]. > To post to this group, send email to [email protected]. > Visit this group at http://groups.google.com/group/sympy. > To view this discussion on the web visit > https://groups.google.com/d/msgid/sympy/fbd3ae7a-1033-4d15-981b-d2b9799cb8be%40googlegroups.com. > For more options, visit https://groups.google.com/d/optout. -- You received this message because you are subscribed to the Google Groups "sympy" group. To unsubscribe from this group and stop receiving emails from it, send an email to [email protected]. To post to this group, send email to [email protected]. Visit this group at http://groups.google.com/group/sympy. To view this discussion on the web visit https://groups.google.com/d/msgid/sympy/CAKgW%3D6J67e-Z5-Yx4HGB6Xv_QYNEfsh6GrujbAeZg6vE0x4PLw%40mail.gmail.com. For more options, visit https://groups.google.com/d/optout.
