Python top tips what is yield in python
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sure! here is a tutorial on python top tips, focusing on the `yield` keyword.
python top tips: understanding `yield` in python
1. *what is `yield`?*
in python, the `yield` keyword is used in generator functions to pause the function's execution and return a value to the caller. when the function is called again, it resumes execution from where it left off.
2. *generators vs. functions:*
regular functions in python use `return` to return a value and then exit. generators, on the other hand, use `yield` to produce a series of values over multiple iterations.
3. *lazy evaluation:*
generators provide a way to implement lazy evaluation, where values are only generated as they are needed. this can be more memory-efficient compared to creating all values at once.
4. *iterating over generators:*
generators can be iterated over using a `for` loop or by calling the `next()` function on the generator object until it raises a `stopiteration` exception.
5. *example of `yield` in python:*
in the example above, the `countdown` function is a generator that yields numbers in reverse order from `n` down to 1. when iterating over the generator, it prints each number until the countdown reaches 1.
remember, using `yield` in python allows you to create efficient and readable code that generates values on-the-fly. generators are powerful tools for handling large datasets, infinite sequences, and more.
i hope this tutorial helps you understand the `yield` keyword in python better! feel free to ask if you have any questions or need further clarification.
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