python xrange 28 Answers Sorted by 1038 In Python 2 x range creates a list so if you do range 1 10000000 it creates a list in memory with 9999999 elements xrange is a sequence object that evaluates lazily In Python 3 range does the equivalent of Python 2 s xrange To get the list you have to explicitly use list range xrange no longer exists
Python s xrange function is utilized to generate a number sequence making it similar to the range function But the main difference between the two functions is that the xrange function is only available in Python 2 whereas the range function is available in both Python 2 and 3 Python3 from time import time as t def xrange x return iter range x def count st t x for x in xrange 10000000 if x 4 0 et t print et st count The results are respectively 1 53888392448 3 215819835662842 Why is that I mean why xrange has been removed It s such a great tool to learn
python xrange
python xrange
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Python xrange Python xrange range xrange xrange stop xrange start stop step start start 0 xrange 5 xrange 0 5 stop stop stop The Python xrange method returns a xrange type object which is an immutable sequence commonly used for looping These objects have very little behavior and only support indexing iteration and the len function xrange start stop step Here start optional is the starting point from which the sequence generation would start
In python 3 range does what xrange used to do and xrange does not exist If you want to write code that will run on both Python 2 and Python 3 you can t use xrange range can actually be faster in some cases eg if iterating over the same sequence multiple times In this lesson you ll see how you can use the range and xrange built ins to make your loops more Pythonic The original loop keeps track of the loop index manually which isn t very Pythonic You can instead keep track automatically if you use range in Python 3 and xrange in Python 2 A range object is a generator in Python
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The range function available in both Python 2 x and 3 x returns a list of numbers while xrange only available in Python 2 x returns an object that generates numbers on the fly making it more memory efficient Using range Example usage of range for i in range 10 print i In Python 2 x you could do Master the Python range function and learn how it works under the hood You most commonly use ranges in loops In this tutorial you ll learn how to iterate over ranges but also identify when there are better alternatives
The range is a built in function that returns a range object that consists series of integer numbers which we can iterate using a for loop In Python Using a for loop with range we can repeat an action a specific number of times For example let s see how to use the range function of Python 3 to produce the first six numbers Example Contents Syntax of xrange in python The syntax of xrange is xrange start stop step xrange takes three parameters start stop and step start It is the starting point from which the sequence would be generated The start is an optional parameter and if not mentioned by default its value is zero
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python xrange - Xrange Edit on GitHub xrange Description Returns an xrange object Syntax xrange stop xrange start stop step start Required when full syntax is used An integer specifying start value for the range stop Required The boundary value for the range step Optional Step value Return Value TODO Time Complexity TODO