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Python

Posted by john larson
john larson
16,594 Points

Tuples, I want to know more about them so I use the python help(), I get this...

I get the first couple of lines, but from "Methods defined here" and on, I'm lost. Are they dunder init functions I will use? or are they the behind the scenes heavy lifting that python does. 

 |  tuple() -> empty tuple
 |  tuple(iterable) -> tuple initialized from iterable's items
 |
 |  If the argument is a tuple, the return value is the same object.
 |
 |  Methods defined here:
 |
 |  __add__(self, value, /)
 |      Return self+value.
 |
 |  __contains__(self, key, /)
 |      Return key in self.
 |
 |  __eq__(self, value, /)
 |      Return self==value.
 |
 |  __ge__(self, value, /)
 |      Return self>=value.
 |
 |  __getattribute__(self, name, /)
 |      Return getattr(self, name).
 |
 |  __getitem__(self, key, /)
 |      Return self[key].
 |
 |  __getnewargs__(...)

1 Answer

Janessa Huppi
.a{fill-rule:evenodd;}techdegree seal-36
Janessa Huppi
Front End Web Development Techdegree Graduate 42,048 Points

They do the heavy lifting, so they are used by you the pythonista indirectly:

thirteen_one = (13, 1)
13 in thirteen_one
# returns True

In this case Python called contains(13, thirteen_one)

Dunder methods can be defined in custom classes to invoke certain behaviors when specific syntax is used. More info

john larson
john larson
16,594 Points

Thanks Jonathin