python - Cant understand dot operator concept -

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People are really confused about the job of the dot operator. The code I have tried .. 

  class name: square x: def __init __ (self, y): self Y = y def __init __ (self): pass some = name () some.xy = 'foo' print something. Xy   
 When I run this code, Code> foo .  
 But when I tried the code  
  class name: class x: def __init __ (self, y, z): self Y = y self.z = z def __init __ (self): pass some = name () some.xyz = 'foo' print some.xyz   
 I get an error. How can i use it as  some.xyz  and get the output as  foo  ?? Any helpful help would be appreciated .. Thank you   
 
 
 It is not clear why you expected the second code to work. The first code is bad because it mixes classes and examples:  some   class   Name is  example ;  some.x  is an  class , and  class attribute 's  name . If you create another  name  example, then it will share the same attributes at  x . Instead, consider this:  
  class name (object): def __init __ (self, x = none, y = none, z = none): self.x X = x (x = x) (Z = 'foo'))) # one-line equivalent print some.exe # 'afo'   
 looks the result:  
  - Something: Name - x: name - x   
 none - y: name - x: none - y: none - z: 'foo' - z: none - y: some No -z: none   
 the arbitrary chain of properties  abcd  and the Switch to expect it to work; You have to define the properties of your object (unless you get into sadness, but we do not worry about it anymore). You can not add voluntary attributes for example wire or  none  (so that you can no longer set  some.xyzfoo = 'bar' ), although you can not set your classes In (so you  Some.xybar = 'baz' ). However, you can not do this  some.x.y.foo.bar = 'baz' , because  some.x.y.foo  is not present (yet).

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