[f2py] Segmentation fault for format write

Hi,
I try to integrate a Fortran output subroutine by Python, the f2py
runs successfully, however, when I run the script, I have got a
Segmentation fault without any more infomation. does f2py support
format write?
here is my Fortran subroutine :
! output.f95
subroutine output
implicit none
 write(*,'(1x,a)') 'write something'
!write(*,*)'write something' !works well

end subroutine output

the corresponding python script is
import output
output.output()
! >>>Segmentation fault