name = ["john", "ann", "mary", "peter", ["ryan", 1], 2, 3, [True, 0,0,9, "hello"]] print(name, id(name), type(name)) print(name[0], name[4]) print(name[4][0]) name[0] = ["david", 20] name[4][0]= 'goodman' print(name) del name[1] print(name) #temp7 a=[1,[2,3],4,5,6,7,8,9,['a','b','c']] print(a[8][1]) a=[1,[2,3],4,[5,[[6],7]],8,9,['a','b','c']] print(a[3][1][0][0]) a[0] = 10 print(a) a[1] = 10 print(a) a = [1,2,3,4,5,6,7,8,9,10,11,12,13,14,15,16] print(a[10], a[-4]) b=slice(0,7,1) # start, end-1, step print(type(b)) print(a[b], a[0:7:1]) print(a[b], a[0:15:7]) x = 2 y = 17 z = 6 b = slice(x,y,z) # start, end-1, step print("aaa") print(a[x:y:z]) print("bbb") print(a[7:2:1]) print(a[7:-1:1]) print(a[7:-1:-1]) print("ccc") print(a[-1:0:-4]) print(a[15:0:-4]) #allow empty value and some functions print(a[-1::-1]) print(a[:10]) # 0:10:1 print(a[::5]) # 0:len(a):5 print(a[0:15:1]) print("ddd") del a[::5] print(a) a.remove(4) print(a) a = [1,2,3,4,5,4,6,7,8,9,10,11,12,13,14,15,16] a.remove(4) print(a) a.clear() print(a) a = [1,2,3,4,5,6,7,8,9,10,11,12,13,14,15,16] a = [] print(a) a = [1,2,3,4,5,6,7,8,9,10,11,12,13,14,15,16] a.sort(reverse=True) # change original list print(a) print("eee") b = sorted(a) print(a) print(b) print("fff") a=[1,2,3,4,9,10,11,12,5,6,7,8,13,14,15] a.sort() print(a) b = sorted(a,reverse=True) c = sorted(a) print(a) print(b) print(c) a=[1,2,3,4,9,10,11,12,5,6,6,7,8,13,14,15] print(a.count(6), a.index(6)) print(a.count(0), a.index(6)) #print(a.count(0), a.index(0)) #error appear for index 0 not in the list