[docs] Py_Initialize() , use matplotlib , Py_Finalize() then Py_Initialize() , then matplotlib , it doesn't works and go wrong

[XingHua Ma]

----------------------------------

test.cpp:

#include<Python.h>
void test2()

{
// int b;
Py_Initialize();
PyRun_SimpleString(“from matplotlib.pyplot import plotfile\n”
“from pylab import show\n”
“plotfile(‘/home/huskier/Desktop/data’)\n”//data file is just nums of 10
rows
“show()\n”);
Py_Finalize();
}

int
main(int argc,char *argv[])
{
test2();
test2();
return 0;
}

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How to work well?And the memory cann't free when use test2() in QT,if you
plot many times at once.
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