Can iterators be reset in Python?
Can I reset an iterator / generator in Python? I am using DictReader and would like to reset it to the beginning of the file.
iterator
If range() is a generator in Python 3.3, why can I not call next() on a range?
Perhaps I’ve fallen victim to misinformation on the web, but I think it’s more likely just that I’ve misunderstood something. Based on what I’ve learned so far, range() is a generator, and generators can be used as iterators. However, this code:
Skip multiple iterations in loop
I have a list in a loop and I want to skip 3 elements after look has been reached.
In this answer a couple of suggestions were made but I fail to make good use of them:
Is there any built-in way to get the length of an iterable in python?
For example, files, in Python, are iterable – they iterate over the lines in the file. I want to count the number of lines.
Is there an expression for an infinite iterator?
Is there a straight-forward expression that can produce an infinite iterator?
When is not a good time to use python generators?
This is rather the inverse of What can you use Python generator functions for?: python generators, generator expressions, and the itertools module are some of my favorite features of python these days. They’re especially useful when setting up chains of operations to perform on a big pile of data–I often use them when processing DSV files.
How to convert an iterable to a stream?
If I’ve got an iterable containing strings, is there a simple way to turn it into a stream? I want to do something like this:
Making a python iterator go backwards?
Is there anyway to make a python list iterator to go backwards?
python groupby behaviour?
The returned group is itself an iterator that shares the underlying iterable with groupby(). Because the source is shared, when the groupby() object is advanced, the previous group is no longer visible. So, if that data is needed later, it should be stored as a list[.]
split a generator/iterable every n items in python (splitEvery)
I’m trying to write the Haskell function ‘splitEvery’ in Python. Here is it’s definition: