I have numpy version 1.6.1 and I see the following behavior : In [380]: X Out[380]: 1.0476157527896641
In [381]: X.__class__ Out[381]: numpy.float64 In [382]: (2,3)*X Out[382]: (2, 3) In [383]: (2,3)/X Out[383]: array([ 1.90909691, 2.86364537]) In [384]: X=float(X) In [385]: (2,3)/X --------------------------------------------------------------------------- TypeError Traceback (most recent call last) /home/cohen/<ipython-input-385-cafbe080bfd5> in <module>() ----> 1 (2,3)/X TypeError: unsupported operand type(s) for /: 'tuple' and 'float' So it appears that X being a numpy float allows numpy to play some trick on the tuple so that division becomes possible, which regular built-in float does not allow arithmetics with tuples. But why is multiplication with "*" not following the same prescription? best, Johann _______________________________________________ NumPy-Discussion mailing list NumPy-Discussion@scipy.org http://mail.scipy.org/mailman/listinfo/numpy-discussion