[Numpy-discussion] f2py pass by reference

[Mathew Yeates]

I have
subroutine foo (a)
      integer a
      print*, "Hello from Fortran!"
      print*, "a=",a
      a=2
      end

and from python I want to do
>>> a=1
>>> foo(a)

and I want a's value to now be 2.
How do I do this?

Mathew
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