![]() The second argument is exclusive and will never appear in the sequence. An iterator is a potential sequence with a method that knows where the next item is in the sequence given the starting and ending point, and the stride length between points. At the end of the day we still have a sequence. That’s code doing that, though, not something that will ever take up more space in memory than it does. board for x in range (0, 5): board.append ( 'O' 5) def printboard (board): for row in board: print ' '.join (row) def randomrow (board): return randint (0, len (board) - 1) def randomcol (board): return randint (0, len (board 0) - 1. Only thing is to get to 1000, it must iterate through the other 0-999. I am trying to make my own version of codecademys Battleships. The new range doesn’t take up any more space for one or a thousand possible elements. The old range returned a list which took up space in memory for every element in the list. It is good practice to put a space between the comma and the next value. List values are placed in between square brackets, separated by commas. Will still give x all the values between 0 and 9 inclusive, in turn. Learn Python 3: Lists Cheatsheet Codecademy Lists Lists In Python, lists are ordered collections of items that allow for easy use of a set of data. It doesn’t matter the difference if we use for to handle the iteration. The range function has one purpose, to create an iterable in Python 2 and an iterator in Python 3. ![]() I do not understand the range function’s effect in this exercise. This works for me: n 1, 2, 3, 4, 5, 6, 7, 8, 9 def flatten(lists): results for numbers in. Join millions of students and teachers in over 180 countries starting with an Hour of Code. For this problem you have to concatenates two lists. … as do commas (compare with what you’ve shown.) Learn Hour of Code Activities Try a one-hour tutorial designed for all ages in over 45 languages. … the last line of which is what you want. ![]() If, however, it is indented like this: board= Reverse a Python List Using a For Loop Python for loops are great ways to repeat an action for a defined number of times. This method doesn’t modify the object in place and needs to be assigned to a variable. … which when printed with the appropriate formatting, gives what you were looking for. In the code above, we create a new list by stepping over the original list in reverse order. Data Scientist: Machine Learning Specialist. If so, it gives the expected output, a list of lists of the character ‘O’:, ,, , ] When you post code, use the icon at the right of the menu bar atop the text box you are using. ![]()
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