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>>> import scalar
>>> print(scalar.foo.__doc__)
foo(a,b)
Wrapper for ``foo``.
Parameters
----------
a : input float
b : in/output rank-0 array(float,'d')
>>> scalar.foo(2, 3)
A= 2. B= 3.
INCREMENT A AND B
NEW A= 3. B= 4.
>>> import numpy
>>> a = numpy.array(2) # these are integer rank-0 arrays
>>> b = numpy.array(3)
>>> scalar.foo(a, b)
A= 2. B= 3.
INCREMENT A AND B
NEW A= 3. B= 4.
>>> print(a, b) # note that only b is changed in situ
2 4
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