009 python语法_类 range

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时间：2018/10/28
目录: 
　　一: 概述
        1 help查看
        2 文件查看
        3 类型查看
　　二: 使用
        1 说明
        2 举例
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# coding:utf-8

help(range)

Help on class range in module builtins:

class range(object)
 |  range(stop) -> range object
 |  range(start, stop[, step]) -> range object

    range(stop) -> range object
    range(start, stop[, step]) -> range object
    
    Return an object that produces a sequence of integers from start (inclusive)
    to stop (exclusive) by step.  range(i, j) produces i, i+1, i+2, ..., j-1.
    start defaults to 0, and stop is omitted!  range(4) produces 0, 1, 2, 3.
    These are exactly the valid indices for a list of 4 elements.
    When step is given, it specifies the increment (or decrement).

# coding:utf-8

print(type(range))

<class ‘type‘>