Computed Assignment Operators

Syntax
u op= x

Purpose
We use y ( z ) to refer to the value of u before (after) the operation. This operation sets z equal to       y op x  .

op
The possible values for op are
 op    Meaning + addition - subtraction * multiplication / division

Types
The following table lists the possible types for x and y (the value of u before the operation) and the corresponding z (the value of u after the operation).                        y  x           float    a_float   a2float          -------------------------------  float   -   float    a_float   a2float a_float  -  a_float   a_float a2float  -  a2float             a2float  The type float does not need to be matched exactly but rather as an instance of float.

Arrays
Either x or y or both may be a numpy.array with elements that match one of possible type choices above. If both x and y are arrays, they must have the same shape. When either x or y is an array, the result z is an array with the same shape. The type of the elements of z correspond to the table above (when the result type is a float, this only refers to the element types matching as instances).

Example
The file assign_op.py contains an example and test of these operations.