查看模块帮助文档: help(len) -- docs for the built in len function (note here you type "len" not "len()" which would be a call to the function) help(sys) -- overview docs for the sys module (must do an "import sys" first) dir(sys) --
定义: Stack arrays in sequence horizontally (column wise). Take a sequence of arrays and stack them horizontally to make a single array. Rebuild arrays divided by hsplit. This function continues to be supported for backward compatibility, but you shoul
一 安装,导入模块 安装: pip3 install 模块名称 导入: import module from module.xx.xx import xx from module.xx.xx import xx as rename from module.xx.xx import * 二 random random.random random.random()用于生成一个0到1的随机符点数: 0 <= n < 1.0 random.randint 用于生成一个指定范围内的整数 random.r
经常调用的时候不知道python当前版本的内置函数是哪些,可以用下面的指令查看: C:\Users\Administrator>python Python 2.7.11 (v2.7.11:6d1b6a68f775, Dec 5 2015, 20:32:19) [MSC v.1500 32 bit ( Intel)] on win32 Type "help", "copyright", "credits" or "license&q