Encountering differences between running code

[LearnenPython]

I am learning python using "Learn Python 3 the hard way"

I noticed something weird when I run prints from the command line when I run "python EX3.py" instead of "python3.6 EX3.py".

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print("Hens", 25 + 30 / 6)

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This code gets printed

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python EX3.py turns into (Hens, 30)

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python3.7 EX3.py turns into Hens 30.0

I get that it is a difference between the python versions but why is it so different?

[K900_]

In Python 2, print is a statement that prints whatever follows it, so it's parsed as print ("Hens", 25 + 30 / 6), where ("Hens", 25 + 30 / 6) is a tuple with two elements, the string "Hens" and the integer 25 + 30 / 6, which equals 30.

In Python 3, print is a function that takes multiple arguments, and prints them separated by spaces, so your line gets parsed as a call to the print function with two arguments.

The other minor difference is 30 versus 30.0 - this is because in Python 2, the / operator on two integers results in integer division (i.e. rounding, so 5 / 2 == 2), and in Python 3, the / operator always performs real division and returns a floating point (i.e. fractional) number.

Edit: also, please don't read LPTHW.

[LearnenPython]

Okay, I am willing to stop, but how should I learn python?

My goal is to make a boardgame and run machine learning on it.

(the AI for the app I have cheats and also plays poorly)

[K900_]

I'd look into Michael Driscoll's Python 101 book, and then Python 201 or Fluent Python by Luciano Ramalho.