Generator Expressions

Generator expressions provide a concise way to create generators using a syntax similar to list comprehensions but with parentheses instead of square brackets. They're more memory efficient than list comprehensions because they generate values on-the-fly rather than building a complete list in memory. Generator expressions are useful when you need to process large datasets or when you only need to iterate through values once. They can be used anywhere an iterator is expected, such as in for loops or as arguments to functions like sum(), max(), min(), etc. Generator expressions can also be nested and include conditional logic. However, they can only be iterated once - after exhaustion, they need to be recreated. Understanding generator expressions allows you to write more memory-efficient code, especially when working with large data streams or when the full list of values isn't needed all at once.