python - Not getting an output when I call __str__ on a class instance? -

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i beginner easy on me. playing __str__ method , found when try print instance doesn't work

import random  brand = ("samsung","nokia","sony","atat","reliance") no_of_sim = ("dual-sim","single-sim") color = ("blue","violet","orange","green") no_of_camera =("front","front-back","back") no_of_cores = ("dual core","quad core","octa core") additional = ("bluetooth","nfs","gps")  class mobile:     def __init__(self,**kwargs):         name = self         self.brand = random.choice(brand)         self.sim = random.choice(no_of_sim)         self.color = random.choice(color)         self.camera = random.choice(no_of_camera)         self.cores = random.choice(no_of_cores)         self.additional = random.choice(additional)         key,value in kwargs.items():             setattr(self,key,value)     def __str__(self):         return "{} {} color {} phone {} facing cameras , {} {}".format(self.__class__.__name__,self.color,self.brand,self.camera,self.cores,self,additional) 
from mobile_phone import mobile swiss = mobile() print(swiss) # doesnt show

you have comma need dot:

import random  brand = ("samsung","nokia","sony","atat","reliance") no_of_sim = ("dual-sim","single-sim") color = ("blue","violet","orange","green") no_of_camera =("front","front-back","back") no_of_cores = ("dual core","quad core","octa core") additional = ("bluetooth","nfs","gps")  class mobile:     def __init__(self,**kwargs):         name = self         self.brand = random.choice(brand)         self.sim = random.choice(no_of_sim)         self.color = random.choice(color)         self.camera = random.choice(no_of_camera)         self.cores = random.choice(no_of_cores)         self.additional = random.choice(additional)         key,value in kwargs.items():             setattr(self,key,value)     def __str__(self):         return("{} {} color {} phone "                "{} facing cameras , {} {}".format(                     self.__class__.__name__,                     self.color,                     self.brand,                     self.camera,                     self.cores,                     self.additional))  # changed self,additional  #from mobile_phone import mobile swiss = mobile() print(swiss)

output:

mobile green color reliance phone front-back facing cameras , dual core bluetooth

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