Python xrange() Function

Python 内置函数Python Built-in Functions

xrange() is a function in Python 2 used to generate a sequence of numbers.

xrange()The function usage is the same asrangeexactly; the difference is that it does not generate an array, but a generator.

Note:In Python 3,xrange()it was removed,range()the function was improved and hasxrange()all the functions and features. That is, in Python 3,range()the function lazily generates sequences, so there is no longer a need forxrange()。

Syntax

xrange syntax:

xrange(stop)
xrange(start, stop[, step])

Parameter description:

  • start: Counting starts from start. Default is starting from 0. For example, xrange(5) is equivalent to xrange(0, 5)
  • stop: Counting ends at stop, but does not include stop. For example: xrange(0, 5) is [0, 1, 2, 3, 4] without 5
  • step: step size, default is 1. For example: xrange(0, 5) is equivalent to xrange(0, 5, 1)

Return Value

Returns a generator.

Examples

The following examples demonstrate how to use xrange:

>>>xrange(8) xrange(8) >>> list(xrange(8)) [0, 1, 2, 3, 4, 5, 6, 7] >>> range(8) # Using range [0, 1, 2, 3, 4, 5, 6, 7] >>> xrange(3, 5) xrange(3, 5) >>> list(xrange(3,5)) [3, 4] >>> range(3,5) # Using range [3, 4] >>> xrange(0,6,2) xrange(0, 6, 2) # Step size is 2 >>> list(xrange(0,6,2)) [0, 2, 4] >>>

Python 内置函数Python Built-in Functions

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