python循环，判断及函数

#for循环格式（类似Java中的foreach）：for 标识符 in 列表名称 :
>>> movies = ["movie1","movie2","movie3"]
>>> for item in movies :
	print(item)
	
movie1
movie2
movie3

#while循环格式：while 循环条件 ：
>>> while count < len(movies) :
	print(movies[count])
	count = count + 1
	
movie1
movie2
movie3

if 满足某个条件 :
    执行某些语句
else :
    执行某些语句

>>> new_movies = ["movie1","movie2","movie3",["movie4_1","movie4_2",["movie_4_3_1","movie_4_3_2"]],"movie5"]
>>> def listItems(items) :
        for item in items :
            if isinstance(item,list) :
                listItems(item)
            else :
                print(item)
			
>>> listItems(new_movies)
movie1
movie2
movie3
movie4_1
movie4_2
movie_4_3_1
movie_4_3_2
movie5