内置函数二---作业
4,用map来处理字符串列表,把列表中所有人都变成sb,比方alex_sb
# name=["alex","oldboy","wusir"]
# print(list(map(lambda x: x+"_sb", name)))
5,用map来处理下述l,然后用list得到一个新的列表,列表中每个人的名字都是sb结尾
# l=[{'name':'alex'},{'name':'y'}]
# print(list(map(lambda dic: {"name": dic['name']+"_sb"} , l)))
# 6,用filter来处理,得到股票价格大于20的股票名字
# shares={
# 'IBM':36.6,
# 'Lenovo':23.2,
# 'oldboy':21.2,
# 'ocean':10.2,
# }
# print(list(filter(lambda x: shares[x] > 20 , shares)))
#7. 有下面字典,得到购买每只股票的总价格,并放在一个迭代器中。
# 结果:list一下[9110.0, 27161.0,......] shares * price
# portfolio = [
# {'name': 'IBM', 'shares': 100, 'price': 91.1},
# {'name': 'AAPL', 'shares': 50, 'price': 543.22},
# {'name': 'FB', 'shares': 200, 'price': 21.09},
# {'name': 'HPQ', 'shares': 35, 'price': 31.75},
# {'name': 'YHOO', 'shares': 45, 'price': 16.35},
# {'name': 'ACME', 'shares': 75, 'price': 115.65}
# ]
#
# print(list(map(lambda dic: dic['shares'] * dic['price'],portfolio)))
# print(list(filter(lambda dic: dic['price'] > 100,portfolio)))
# # # 有下列三种数据类型,
# l1 = [1,2,3,4,5,6]
# l2 = ['oldboy','alex','wusir','太白','日天']
# tu = ('**','***','****','*******')
# # 写代码,最终得到的是(每个元祖第一个元素>2,第三个*至少是4个)
# # [(3, 'wusir', '****'), (4, '太白', '*******')]这样的数据。
# l1 = [1,2,3,4,5,6]
# l2 = ['oldboy','alex','wusir','太白','日天']
# tu = ('**','***','****','*******')
# # 写代码,最终得到的是(每个元祖第一个元素>2,第三个*至少是4个)
# # [(3, 'wusir', '****'), (4, '太白', '*******')]这样的数据。
# # ????
# print(list(filter(lambda x: x[0] > 2 and len(x[2]) >=4, zip(l1, l2, tu))))
# print(list(filter(lambda x: x[0] > 2 and len(x[2]) >=4, zip(l1, l2, tu))))
l1 = [ {'sales_volumn': 0},
# {'sales_volumn': 108},
# {'sales_volumn': 337},
# {'sales_volumn': 475},
# {'sales_volumn': 396},
# {'sales_volumn': 172},
# {'sales_volumn': 9},
# {'sales_volumn': 58},
# {'sales_volumn': 272},
# {'sales_volumn': 456},
# {'sales_volumn': 440},
# {'sales_volumn': 239}]
# print(list(sorted(l1, key=lambda x: x['sales_volumn'])))
# {'sales_volumn': 108},
# {'sales_volumn': 337},
# {'sales_volumn': 475},
# {'sales_volumn': 396},
# {'sales_volumn': 172},
# {'sales_volumn': 9},
# {'sales_volumn': 58},
# {'sales_volumn': 272},
# {'sales_volumn': 456},
# {'sales_volumn': 440},
# {'sales_volumn': 239}]
# print(list(sorted(l1, key=lambda x: x['sales_volumn'])))