object member assignment in python -

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• list of lists changes reflected across sublists unexpectedly 13 answers

class func:     def __init__(self):         self.weight = 0 class skill:     def __init__(self, bson):         self.f = [func()]*5         in range(0,5):             self.f[i].weight = bson['w'+str(i+1)] d = {"w1":20,"w2":0,"w3":0,"w4":0,"w5":0}  s = skill(d) print s.f[0].weight 

the output 0 rather 20. hard figure out difference of class member , object member in python.

you should not create list of func in way

self.f = [func()]*5 

you should use list comprehension or other method

self.f = [func() _ in range(5)] 

in first method, creating list of length 5, elements pointing same instance of func. don't want this, want create list of 5 different instances of func.