<div dir="ltr">First send configure.log so we can see the setup.<div><br></div><div>  Thanks,</div><div><br></div><div>      Matt</div></div><br><div class="gmail_quote"><div dir="ltr" class="gmail_attr">On Thu, Oct 13, 2022 at 12:53 AM Peng Sun <<a href="mailto:psun@outlook.com">psun@outlook.com</a>> wrote:<br></div><blockquote class="gmail_quote" style="margin:0px 0px 0px 0.8ex;border-left:1px solid rgb(204,204,204);padding-left:1ex"><div class="msg-3777301088726554520">




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Dear PETSc community,<u></u> <u></u></p>
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I have a question regarding the single precision complex numbers of petsc4py.<span> 
</span>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.  </p>
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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!</p>
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<pre style="margin-top:0px;width:auto;max-height:600px;overflow:auto;text-align:left"><code style="margin:0px"><span style="margin:0px;font-size:13px">import</span> petsc4py
<span style="margin:0px;font-size:13px">import</span> sys
petsc4py.init(sys.argv)
<span style="margin:0px;font-size:13px">from</span> petsc4py <span style="margin:0px;font-size:13px">import</span> PETSc

da=PETSc.DA().create(sizes=[<span style="margin:0px;font-size:13px">2</span>,<span style="margin:0px;font-size:13px">2</span>,<span style="margin:0px;font-size:13px">2</span>],dof=<span style="margin:0px;font-size:13px">1</span>,stencil_type=<span style="margin:0px;font-size:13px">0</span>,stencil_width=<span style="margin:0px;font-size:13px">1</span>,boundary_type=<span style="margin:0px;font-size:13px">1</span>)
da_1 = da.createGlobalVec()
<span style="margin:0px;font-size:13px">print</span>(petsc4py.PETSc.ComplexType)
<span style="margin:0px;font-size:13px">print</span>(da_1.getArray().dtype)</code></pre>
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Best regards,</p>
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Peng Sun</p>
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</div></blockquote></div><br clear="all"><div><br></div>-- <br><div dir="ltr" class="gmail_signature"><div dir="ltr"><div><div dir="ltr"><div><div dir="ltr"><div>What most experimenters take for granted before they begin their experiments is infinitely more interesting than any results to which their experiments lead.<br>-- Norbert Wiener</div><div><br></div><div><a href="http://www.cse.buffalo.edu/~knepley/" target="_blank">https://www.cse.buffalo.edu/~knepley/</a><br></div></div></div></div></div></div></div>