[petsc-users] Issue with single precision complex numbers in petsc4py

[Peng Sun]

Hi Matt,

Sure, please see the attached configure.log file.  Thanks!

Best regards,
Peng Sun


________________________________
From: Matthew Knepley <knepley at gmail.com>
Sent: Thursday, October 13, 2022 6:34 AM
To: Peng Sun <psun at outlook.com>
Cc: petsc-users at mcs.anl.gov <petsc-users at mcs.anl.gov>
Subject: Re: [petsc-users] Issue with single precision complex numbers in petsc4py

First send configure.log so we can see the setup.

  Thanks,

      Matt

On Thu, Oct 13, 2022 at 12:53 AM Peng Sun <psun at outlook.com<mailto:psun at outlook.com>> wrote:

Dear PETSc community,


I have a question regarding the single precision complex numbers of petsc4py.  I configured PETSc with the “--with-scalar-type=complex --with-precision=single" option before compiling, but all the DA structures I created with petsc4py had double precision.


Here is a minimum test code on Python 3.8/PETSc 3.12/petsc4py 3.12: both print commands show data type of complex128.  Could anybody please help me?  Thanks!


import petsc4py
import sys
petsc4py.init(sys.argv)
from petsc4py import PETSc

da=PETSc.DA().create(sizes=[2,2,2],dof=1,stencil_type=0,stencil_width=1,boundary_type=1)
da_1 = da.createGlobalVec()
print(petsc4py.PETSc.ComplexType)
print(da_1.getArray().dtype)




Best regards,

Peng Sun


--
What most experimenters take for granted before they begin their experiments is infinitely more interesting than any results to which their experiments lead.
-- Norbert Wiener

https://www.cse.buffalo.edu/~knepley/<http://www.cse.buffalo.edu/~knepley/>
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