A for loop in Python doesn’t require an index ... It takes an iterable and upon each iteration generates a tuple of the index and the object at that index: x = [3,1,4,1,5,9] for index, n ...

In general, for loops are used when you know exactly how many times you plan to run a loop; a while loop is used when the number of iterations is uncertain. Note: The if statement is like a single ...

Python is a general-purpose programming ... that can store the contents of each file on each iteration.>>>file_in = list() Use a "for" loop to cycle through each file name in the file name list.

If you’ve ever written any Python at all, the chances are you’ve used iterators without even realising it. Writing your own and using them in your programs can provide significant performance ...