https://blog.youkuaiyun.com/gengfu_phpzh-cnhttps://blog.youkuaiyun.com/https://blog.youkuaiyun.com/gengfu_php/article/details/78571374https://blog.youkuaiyun.com/gengfu_php/article/details/78571374gengfu_phpSat, 18 Nov 2017 21:24:10 +0800>> a = (1,2,3) >>> del a[0] Traceback (most recent call last): File "", line 1, in TypeError: 'tuple' object doesn't support item del]]>https://blog.youkuaiyun.com/gengfu_php/article/details/78546428https://blog.youkuaiyun.com/gengfu_php/article/details/78546428gengfu_phpWed, 15 Nov 2017 23:52:16 +0800>> a = list() >>> a []>>> b = list('python') >>> b ['p', 'y', 't', 'h', 'o', 'n']>>> c = list('1234') >>> c ['1', '2', '3', '4']>>> d =]]>https://blog.youkuaiyun.com/gengfu_php/article/details/78546216https://blog.youkuaiyun.com/gengfu_php/article/details/78546216gengfu_phpWed, 15 Nov 2017 23:15:39 +0800>> a= 'afe' >>> a 'afe' >>> a[5] Traceback (most recent call last): File "", line 1, in IndexError: string index out of range2 切片s[起始索引:结束索引:步长]含起始，不]]>https://blog.youkuaiyun.com/gengfu_php/article/details/78544846https://blog.youkuaiyun.com/gengfu_php/article/details/78544846gengfu_phpWed, 15 Nov 2017 20:46:04 +0800https://blog.youkuaiyun.com/gengfu_php/article/details/78536070https://blog.youkuaiyun.com/gengfu_php/article/details/78536070gengfu_phpTue, 14 Nov 2017 22:40:41 +0800https://blog.youkuaiyun.com/gengfu_php/article/details/78483385https://blog.youkuaiyun.com/gengfu_php/article/details/78483385gengfu_phpWed, 08 Nov 2017 21:14:13 +0800https://blog.youkuaiyun.com/gengfu_php/article/details/78473539https://blog.youkuaiyun.com/gengfu_php/article/details/78473539gengfu_phpTue, 07 Nov 2017 22:47:49 +0800https://blog.youkuaiyun.com/gengfu_php/article/details/78447547https://blog.youkuaiyun.com/gengfu_php/article/details/78447547gengfu_phpSun, 05 Nov 2017 08:39:17 +0800https://blog.youkuaiyun.com/gengfu_php/article/details/78430721https://blog.youkuaiyun.com/gengfu_php/article/details/78430721gengfu_phpThu, 02 Nov 2017 23:52:07 +0800https://blog.youkuaiyun.com/gengfu_php/article/details/78429858https://blog.youkuaiyun.com/gengfu_php/article/details/78429858gengfu_phpThu, 02 Nov 2017 21:54:40 +0800https://blog.youkuaiyun.com/gengfu_php/article/details/78429399https://blog.youkuaiyun.com/gengfu_php/article/details/78429399gengfu_phpThu, 02 Nov 2017 21:09:20 +0800https://blog.youkuaiyun.com/gengfu_php/article/details/78420339https://blog.youkuaiyun.com/gengfu_php/article/details/78420339gengfu_phpThu, 02 Nov 2017 00:15:06 +0800https://blog.youkuaiyun.com/gengfu_php/article/details/78419695https://blog.youkuaiyun.com/gengfu_php/article/details/78419695gengfu_phpWed, 01 Nov 2017 22:36:52 +0800>> L = ['Michael', 'Sarah', 'Tracy', 'Bob', 'Jack']取前3个元素，笨办法：>>> [L[0], L[1], L[2]] ['Michael', 'Sarah', 'Tracy']取前N个元素，也就是索引为0-(N-1)的元素，可以用循环：>>> r = [] >>]]>https://blog.youkuaiyun.com/gengfu_php/article/details/78418225https://blog.youkuaiyun.com/gengfu_php/article/details/78418225gengfu_phpWed, 01 Nov 2017 20:27:14 +0800>> int('123') 123 >>> int(12.34) 12 >>> fl]]>https://blog.youkuaiyun.com/gengfu_php/article/details/78398737https://blog.youkuaiyun.com/gengfu_php/article/details/78398737gengfu_phpMon, 30 Oct 2017 23:36:06 +0800https://blog.youkuaiyun.com/gengfu_php/article/details/78398182https://blog.youkuaiyun.com/gengfu_php/article/details/78398182gengfu_phpMon, 30 Oct 2017 22:27:10 +0800: <执行1> elif <条件判断2>: <执行2> elif <条件判断3>: <执行3> else: <执行4>if语句执行有个特点，它是从上往下判断，如果在某个判断上是True，把该判断对应的语句执行后，就忽略掉剩下的elif和else，所以，请]]>https://blog.youkuaiyun.com/gengfu_php/article/details/78397593https://blog.youkuaiyun.com/gengfu_php/article/details/78397593gengfu_phpMon, 30 Oct 2017 21:29:41 +0800https://blog.youkuaiyun.com/gengfu_php/article/details/78388055https://blog.youkuaiyun.com/gengfu_php/article/details/78388055gengfu_phpSun, 29 Oct 2017 21:15:37 +0800https://blog.youkuaiyun.com/gengfu_php/article/details/78307950https://blog.youkuaiyun.com/gengfu_php/article/details/78307950gengfu_phpSun, 22 Oct 2017 08:47:34 +0800https://blog.youkuaiyun.com/gengfu_php/article/details/78169448https://blog.youkuaiyun.com/gengfu_php/article/details/78169448gengfu_phpSat, 07 Oct 2017 14:25:32 +0800