Python Tutorial: Generators смотреть онлайн

Return sends a specified value back to its caller. The return statement returns a value and terminates the whole function and
only one return statement can be used in the function.


Yield can produce a sequence of values. The yield statement pauses the function execution by retaining its states and sends a value back to the caller. When the function resumes, it continues execution
immediately after the last yield run.

A generator function is defined just like a regular function,
but whenever it needs to generate a value,
it does so with the yield keyword rather than return.
If the body of a def contains yield, the function automatically
becomes a generator function.


generator function returns a generator object that is iterable,
i.e., can be used as an Iterator.

We should use yield when we want to iterate over a sequence,
but don’t want to store the entire sequence in memory.
Yield is used in Python generators.

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