python opencv 3.3.0 + python 2.7 . how read/change tracker parameters

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TrackerKCF_create()- function creates object, but ow read and change tracker parametes. There is Params struct, in which are these parametees In c++. (for example: interpolation factor, sigma....)... How to reach to these parametees in python-opencv ??? And in TLD tracker i can't find a way to turn on or off learning. and during the time, program starts to work slowly....

Thanks in advance !