The yield statement suspends function’s execution and sends a value back to caller, but retains enough state to enable function to resume where it is left off. When resumed, the function continues execution immediately after the last yield run. This allows its code to produce a series of values over time, rather them computing them at once and sending them back like a list.
Let’s see with an example:
1 2 3
Return sends a specified value back to its caller whereas Yield can produce a sequence of values. We should use yield when we want to iterate over a sequence, but don’t want to store the entire sequence in memory.
Yield are used in Python generators. A generator function is defined like a normal 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.
1 4 9 16 25 36 49 64 81 100
This article is contributed by Arpit Agarwal. If you like GeeksforGeeks and would like to contribute, you can also write an article and mail your article to firstname.lastname@example.org. See your article appearing on the GeeksforGeeks main page and help other Geeks.
Please write comments if you find anything incorrect, or you want to share more information about the topic discussed above
- Returning Multiple Values in Python
- Generators in Python
- Python | Set 2 (Variables, Expressions, Conditions and Functions)
- Function Decorators in Python | Set 1 (Introduction)
- Precision Handling in Python
- Python | globals() function
- Python | Pandas str.join() to join string/list elements with passed delimiter
- Python | Pandas Series.str.cat() to concatenate string
- Python | Pandas.Categorical()
- Python | Pandas Categorical DataFrame creation