python学习笔记（二）python基础知识(交作业)

交作业

#!/usr/bin/env python
# coding: utf-8

# # 1. 每个用户购买了多少不同种类的产品
#

filename = 'train.txt'

import sys
result=[]
with open(filename, 'r', encoding='utf8') as fp:
    for line in fp:
        result.append(list(line.strip('\n').split(',')))
print(result)

result.pop(0)

from collections import defaultdict,namedtuple
d=defaultdict(set)
for x,y in result:
    d[x].add(y)

print('每个用户购买了多少种不同的产品')
for k, v in d.items():
    print(k, len(v))

print('每个用户购买的哪些产品')
for k, v in d.items():
    print(k,v)

# # 2. 列出2018-01-01到2018-06-30的所有日期

from datetime import datetime, timedelta, date

st=datetime.strptime('2018-01-01', '%Y-%m-%d')
ed=datetime.strptime('2018-06-30', '%Y-%m-%d')

diffday=ed-st
diffday=diffday.days+1

for i in range(diffday):
    n=st + timedelta(days=i)
    print(n.strftime('%Y-%m-%d'))

s=0
printtime=st
while s<diffday:
    print(printtime.strftime('%Y-%m-%d'))
    printtime=printtime + timedelta(days=1)
    s+=1