python 2.7 - Copy instance of class of package -

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i work rosbag package provided ros.org. code looks like

import rosbag  bag_path = "/path/to/bag/file.bag" bag = rosbag.bag(bat_path)

and want is, copy instance bag correctly, because want process data in 2 different threads.

unfortunatelly, class bag not provide proper function copy().

so, how copy instance of external class properly?

thank support.

the copy package can used create new , identical instances of custom classes.

import copy  class testclass:    def __init__(self, a, b, c):        self.a =        self.b = b        self.c = c  x = testclass(1, 2, 3) y = copy.copy(x)

x , y have save variable properties, if change x.a, y.a not affected.


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