tensor.utils – Tensor Utils

• theano.tensor.utils.hashfrom_ndarray(_data)[source]
• Return a hash from an ndarray.

It takes care of the data, shapes, strides and dtype.

• theano.tensor.utils.shapeof_variables(_fgraph, input_shapes)[source]
• Compute the numeric shape of all intermediate variables given input shapes.

Parameters:

• fgraph – The theano.FunctionGraph in question.
• input_shapes (dict) – A dict mapping input to shape.Returns:

• shapes (dict) – A dict mapping variable to shape
• .. warning:: This modifies the fgraph. Not pure.

Examples

>>> import theano
>>> x = theano.tensor.matrix('x')
>>> y = x[512:]; y.name = 'y'
>>> fgraph = theano.FunctionGraph([x], [y], clone=False)
>>> d = shape_of_variables(fgraph, {x: (1024, 1024)})
>>> d[y]
(array(512), array(1024))
>>> d[x]
(array(1024), array(1024))