python - Error with print: unsupported operand type(s) for +: 'NoneType' and 'str' -

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I have the code to add two strings but this is showing me an error.

+: 'Any type' and 'str' for unsupported operand type (s)

How can I fix it?

print is a function, no one is returning

Then when you write 

  print (name) + "good boy"

You are actually adding return value function call ( I.e. none) in the string 

  print (name, "good boy")

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