1.use a list comprehension to create a list,cubes_by_four
2.the comprehension should consist of cubes of the numbers 1 through 10 only if the cube is evenly divisible by four.
3.finally,print that list to the console.
cubes_by_four =[cube ** 3 for cube in range(1,11) if cube**3 % 4 == 0]
print cubes_by_four
cube有三次方的意思，开始按照语法写，出现错误，看了问答，原来是三次方没写。
14.try it
1.create a list,squares,that cosists of the squares of the numbers 1 to 10.a list comprehension could be useful here.
2.use filter() and a lambda expression to print out only the squares that are between 30 ad 70(inclusive).
syntax:
cubes =[x **3 for x in range(1,11)]
filter (lambda x: x % 3 == 0,cubes)
hint:
you'll want to filter for x >=30 and x <=70
squares = [x ** 2 for x in range(1,11)]
print filter(lambda x: x >=30 and x <=70,squares)
print 没写，看题目不仔细
x >=30 少了=号，不认真看题，只看到包括70,没注意30也包括在里面
