Not sure why this is happening or how to fix it. I'm new to Python and any help is appreciated.
class Sentence:
def __init__(self, s):
self.s= s
x=s[:-1]
self.L= list(x.split())
def __getitem__(self,idx):
return (self.L[idx])
s= Sentence('What a beautiful morning!')
getitem(s, 2)
NameError: name 'getitem' is not defined
From the docs:
object.__getitem__(self, key)Called to implement evaluation of
self[key]. ...
By implementing __getitem__, you can use the bracket notation to retrieve items:
s[2]
Or by calling __getitem__ explicitly (I wouldn't do it):
s.__geitem__(2)
Blender has a nice straightforward answer but for what it's worth, I notice that you typed:
getitem(s, 2)
It looks like you were thinking something like this:
def __getitem__(self, x):
| |
--------- |
| ------------
v v
getitem(s, 2)
It may or may not be of some benefit to you for me to note that when you define a method for a class and you pass self as an argument, you're specifying the instance of that class, i.e. the object, as self. So when you do self.s = s you're saying "set this object's s to the parameter s's value."
self does not become one of the arguments in parentheses; you can think of that argument as being a special one outside of the parentheses.
def __getitem__(self, x):
| |
------------------ |
| ---------
v v
s.__getitem__(2)
Again, as Blender said, since __getitem__() is a special function (which is kind of like an operator override for subscript), you shouldn't call it directly - just a heads up!
For more, see this question.
