day13 练习

day13 练习

筛选掉长度小于3的，剩下的大写输出

lst = ['吴彦祖','这一年','解决','就','可好看','就看见了','dfafdsa']

ls = [name.upper() for name in lst if len(name)>=3 ]

print(ls)

#笛卡尔积

lst = [(i,j)for i in range(5) for j in range(5) if i%2==0 and j%2==1]

print(lst)

#去除列表中的3,6,9，组成新的列表

lst = [[1,2,3],[4,5,6],[7,8,9]]

lst1 = [ls[2]for ls in lst]

print(lst1)

#[3,6,9]

print([[i-2,i-1,i] for i in [3,6,9]])

#50以内能被3整除的数的平方

print([i**2 for i in range(50) if i%3==0])

#[(0, 1), (1, 2), (2, 3), (3, 4), (4, 5), (5, 6)]

print([(i,i+1) for i in range(6])

#lst = ['sdf','发大水发多少','d地方大师傅']

print( el+str(index) for index,el in enumerate(lst)

print([lst[i]+str(i) for i in range(len(lst))])

# [[1517991992.94, 100], [1517992000.94, 200], [1517992014.94, 300],

# [1517992744.94, 350], [1517992800.94, 280]]

x = {

　　'name':'alex'

　　'Values':[{'timestamp':1517991992.94,

　　'values':100,},

　　{'tmestamp': 1517992000.94,

　　'values': 200,},

　　{'timestamp': 1517992014.94,

　　'values': 300,},

　　{'timestamp': 1517992744.94,

　　'values': 350},

　　{'timestamp': 1517992800.94,

　　'values': 280}],}

print([[i['timestamp'],i['values']] for i in x['Values']])