Python Unit testing backup statics -

i'm trying unit test in python have troubles statics attributes.
problem is: python doesn't backup static attributes entails test acts unpredictable. here example code:

def test1(self):     self.assertisnone(myclass.var)     config.var = "it works"     self.assertequals("it works", myclass.var)  def test2(self):     self.assertisnone(myclass.var) # fails     config.var = "it works really"     self.assertequals("it works really", myclass.var) 

in given case can avoid resetting value either when end of first test reached or setup() , teardown() in situation not (it hard example). want make script static attributes of classes automatically i'm used in php.

i run unit tests nose (nosetests path_to_tests) switch "testing framework" if needed to.

i'm not sure why want avoid using setup() , teardown() functions, whatever reason, preventing building own pseudo-setup function? example:

def test1(self):     myclass.prep()     self.assertisnone(myclass.var)     config.var = "it works"     self.assertequals("it works", myclass.var)  def test2(self):     myclass.prep(var="whatever")     self.assertisnone(myclass.var) # fails     config.var = "it works really"     self.assertequals("it works really", myclass.var)  def prep(self, var="temp", var2="temp2"):     myclass.var = var     myclass.var2 = var2  

i've done before in cases wanted external device testing disable itself. built function go turn off , in whatever tests wanted in, run "prep" function ensure test worked. if test worked, right before finishing, call prep function again turn device on.