print("Hello World") print(f"{42:5d}") name = ["ann", "mary", 'john', "peter"] name1 = ["ann", "mary", 'john', "peter", [1,2,3,4 ],True] print( name, id( name ), type( name) ) print( name[0], name[1]) name[3]='david' print( name) print( name1) print(name1[4]) print(name1[4][1]) name = ["ann", ["mary", 'john'], "peter", [1,2,3,4 ],[True,4,[5,6],7,8],["hello",False],"ann"] print(name) print(name[4][2][1]) print(name[5], name[-2], len(name) ) print(name[len(name)-2], name[-2], len(name) ) name.append([1,2,3]) print(name) name.insert(1,True) print(name) name = "ann", ["mary", 'john'], "peter", [1,2,3,4 ],[True,4,[5,6],7,8],["hello",False],"ann" print(name, type(name))