call python function in parfor loop

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Kevin Zhu 2022-2-19

1
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https://ww2.mathworks.cn/matlabcentral/answers/1653455-call-python-function-in-parfor-loop

回答： Al Danial 2023-7-8

I have managed to call python function in matlab. However, I would like to know if it is possible to call python function within a parfor loop? If it is not, is there a method to perform parallel computation in my python function?

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Kevin Zhu 2022-2-20

what do you mean snippet? I have pasted all the warning message from command window here.

Takayuki Nagata 2023-6-21

在 MATLAB Online 中打开

Hi.

I am facing the same problem.

My environment is MATLAB R2023a on Windows 10 with Python 3.8.

I would appreciate it if you could give me some guidance.

My MATLAB script is as follows:

clear all
np = py.importlib.import_module('numpy');
nr=10;
alpha=0.2;
q_sbf = np.loadtxt("xxx.txt");
[v_ic_org,~] = pyrunfile('F_extract_initial_state.py',["v_ic_org","u"],q_sbf=q_sbf);
Z=zeros(size(double(v_ic_org)))';
parfor r=1:nr
    v_ic = alpha*randn(size(double(v_ic_org)));
    tmp = pyrunfile('F_sim_linear_fwd.py',"sol_lin",q_sbf=q_sbf,v_ic=v_ic);
    z = double(tmp);
    Z(:,r) = z(:,end);
end

Thank you!

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回答（1 个）

Al Danial 2023-7-8

0
链接

此回答的直接链接

https://ww2.mathworks.cn/matlabcentral/answers/1653455-call-python-function-in-parfor-loop#answer_1269633

An alternative to parfor is to run the loop in parallel with dask. The function running in parallel, sol_lin(), in your case, can either be sent to the cores on your own computer, or to multiple computers on your network.

https://al.danial.org/posts/parallel_matlab_with_dask/ has examples.