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python provides two main constructs for iterating over a sequence of elements: for loops and iterators. while both serve the purpose of traversing through a collection, they differ in their implementation, use cases, and flexibility. in this tutorial, we'll explore the differences between for loops and iterators in python, along with code examples to illustrate their usage.
the for loop in python is a concise and readable way to iterate over a sequence (e.g., list, tuple, string).
in this example, the for loop iterates over the numbers list, and in each iteration, the variable num takes the value of the current element in the list. the loop prints each number.
an iterator is an object that implements the python iterator protocol, consisting of the _iter_ and _next_ methods. this protocol allows objects to be iterated over using the for loop.
in this example, the myiterator class defines an iterator for the numbers list. the _iter_ method initializes the iterator, and _next_ method returns the next element in the sequence.
readability:
flexibility:
memory usage:
choose between for loops and iterators based on the specific requirements of your code. for simple iterations, for loops are usually sufficient, while iterators offer more control and customization when needed.
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