# Convert Python list Type to MATLAB double

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SAI KRISHNA CHADA on 2 Dec 2021
Answered: Sean de Wolski on 2 Dec 2021
Hello All,
I would like to convert the python list type to matlab double.
I have tried the following,
First approach
out = func.getValues() %python function gives a list of [1,2,...n]
out = cell(out(1:end-1));
out = cellfun(@double,out); %outputs type double
Second approach
out = func.getValues() %python function gives a list of [1,2,...n]
out = func.convlisttoarray(out) %python function imports numpy and converts list to array using numpy.array()
out_double = double(out); % outputs type double
Although the length of the list is 1x150, in both the approaches, Matlab is taking a lot of computation time and the system hangs for a while. This is wierd to me, as a couple of days earlier everything worked fine and it could solve the problem in milli seconds.
Could anyone of you please help me with a faster approach to convert the python list to matlab double?
I am using Matlab 2019b.
Cheers,
Sai Krishna

Sean de Wolski on 2 Dec 2021
q = py.list({1,2,3})
q =
Python list with no properties. [1.0, 2.0, 3.0]
cq = cell(q)
cq = 1×3 cell array
{[1]} {[2]} {[3]}
[cq{:}]
ans = 1×3
1 2 3