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I've just developed my first python program! In order to learn something more out of it I think the best idea and post it here. I'm just wondering if there is a better way to write this program.

It is a python program that brings "i-ching, the book of mutations" with the translation by Richard Wilhelm, on command line.

The complete project is on github: https://github.com/roorco/CliChing/blob/master/cliching.py

Interesting to note: in order to recognize which hexagram the program extracts, it transforms the hexagram in a binary number. In coding this I suppose I understood how Leibniz discovered the binary number studying I-Ching.

Thanks to this exercise I understood better the classes in Python but still one thing is not clear for me:

if I wrote:

class Line(object):
    def intro():
        ...

and the end of the code I call: 

Line().intro()

the result will be:

TypeError: intro() takes no arguments (1 given)

Why? The only way I figure out is giving a 'x' argument to intro. Other ways are possible?

If you like to, please leave me some feedback.

senshin
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ro_orco
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1 Answers1

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Methods that are defined within a class need to take self as a parameter. This is basically because they need to know which object the function is operating on. Take a look at these 2 links they do a pretty good job of explaining what self is and why we need to use it.

What is the purpose of self?

https://freepythontips.wordpress.com/2013/08/07/the-self-variable-in-python-explained/

Community
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user3282276
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