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Custom object with __iter__() not returning what is defined in __tuple__()?


Custom object with __iter__() not returning what is defined in __tuple__()?

By : EW80
Date : November 20 2020, 03:01 PM
Does that help __tuple__ isn't a thing. tuple doesn't look for a __tuple__ method to perform conversion-to-tuple. I don't know where you got that idea.
code :


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Python - implement __iter__ or return a list's __iter__

Python - implement __iter__ or return a list's __iter__


By : Andrés Soria
Date : March 29 2020, 07:55 AM
Hope this helps It is fine to use the iterator of the built-in list type. I'd suggest not to call __iter__() explicitly, though, but rather use the built-in function iter():
code :
def __iter__(self):
    return iter(self.list)
What is the use of returning self in the __iter__ method?

What is the use of returning self in the __iter__ method?


By : Ali Yousefi
Date : March 29 2020, 07:55 AM
should help you out , EDIT: for 2.7 instead of 3
Here is my understanding
code :
class Testing:
    def __init__(self,a,b):
        self.a = a
        self.b = b
    def __iter__ (self):
        return self
    def next(self):
        if self.a <= self.b:
            self.a += 1
            return self.a-1
        else:
            raise StopIteration

myObj = Testing(1,5)           
for i in myObj:
    print i
Why `__iter__` does not work when defined as an instance variable?

Why `__iter__` does not work when defined as an instance variable?


By : Latif Amrane
Date : March 29 2020, 07:55 AM
will be helpful for those in need It is done by design. You can find the thorough description here: https://docs.python.org/3/reference/datamodel.html#special-method-lookup
Short answer: the special method must be set on the class object itself in order to be consistently invoked by the interpreter.
code :
class A:
    def __init__(self):
        self.__iter__ = lambda: iter('text')
Powershell runspace output behaves differently depending on how returning custom object is defined

Powershell runspace output behaves differently depending on how returning custom object is defined


By : xvn177
Date : March 29 2020, 07:55 AM
To fix the issue you can do It appears that my primary issue, aside from errors in my code, was a lack of understanding related to powershell's default object handling. Powershell displays the output of objects as a table when there are less than four key-value pairs and as a list when there are more.
The custom object returned in my test module had more than for key-value pairs while the custom object I returned directly only had two. This resulted in what I thought was odd behavior. I compounded the issue by removing some key-value pairs in my posted code to shorten it and then didn't test it (sorry).
What is the purpose of __iter__ returning the iterator object itself?

What is the purpose of __iter__ returning the iterator object itself?


By : Edward213
Date : March 29 2020, 07:55 AM
it should still fix some issue When you loop over something using for x in something, then the loop actually calls iter(something) first, so it has something to work with. In general, the for loop is approximately equivalent to something like this:
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