#!/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