python之路day8作业

第一题
1. 文件a.txt内容：每一行内容分别为商品名字，价钱，个数。
apple 10 3
tesla 100000 1
mac 3000 2
lenovo 30000 3
chicken 10 3
通过代码，将其构建成这种数据类型：[{'name':'apple','price':10,'amount':3},{'name':'tesla','price':1000000,'amount':1}......] 并计算出总价钱。
方法一：
with open("第一题",encoding="utf-8") as f1:
    new_list = []
    dic = {}
    total_price = 0
    for line in f1:
        l1 = line.split()
        dic = {"name":l1[0],"price":l1[1],"amount":l1[2]}
        new_list.append(dic)
        total_price += int(l1[1]) * int(l1[2])
    print(new_list)
    print(total_price)

apple 10 3
tesla 100000 1
mac 3000 2
lenovo 30000 3
chicken 10 3
方法二：
with open("第一题",encoding="utf-8") as f1:
    li1 = []
    new_list = ["name","price","amount"]
    total_price = 0
    for line in f1:
        dic = {}
        l1 = line.split()
        for i in range(len(new_list)):
            dic[new_list[i]] = l1[i]
        li1.append(dic)
        total_price += int(dic["price"])*int(dic["amount"])
    print(li1)
    print(total_price)

第二题
import os
with open("第二题",encoding="utf-8") as f1,\
    open("第二题新",encoding="utf-8",mode="w") as f2:
    s1 = f1.read()
    s2 = s1.replace("alex","SB")
    f2.write(s2)
os.remove("第二题")
os.rename("第二题新","第二题")

import os
with open("第二题",encoding="utf-8") as f1,\
    open("第二题新",encoding="utf-8",mode="w") as f2:
    for line in f1:
        new_line = line.replace("SB", "alex")
        f2.write(new_line)
os.remove("第二题")
os.rename("第二题新", "第二题")

3.文件a1.txt内容
文件内容：
name:apple price:10 amount:3 year:2012
name:tesla price:100000 amount:1 year:2013

通过代码，将其构建成这种数据类型：
[{'name':'apple','price':10,'amount':3},
{'name':'tesla','price':1000000,'amount':1}......]
并计算出总价钱。
with open("第三题",encoding="utf-8") as f1:
    li = []
    total_price = 0
    for line in f1:
        dic = {}
        l1 = line.split()
        for i in l1:
            v1, v2 = i.split(":")
            dic.setdefault(v1, v2)
        li.append(dic)
        total_price += int(dic["price"]) * int(dic["amount"])
    print(li)
    print(total_price)

4,文件a2.txt
文件内容：
序号     部门      人数      平均年龄      备注
1       python    30         26         单身狗
2       Linux     26         30         没对象
3       运营部     20         24         女生多
通过代码，将其构建成这种数据类型：
[{'序号':'1','部门':Python,'人数':30,'平均年龄':26,'备注':'单身狗'},
......]
并计算出总价钱。
方法一：
with open("第四题",encoding="utf-8") as f1:
    l1_key = f1.readline().split()
    li = []
    for line in f1:
        dic = {}
        l2_value = line.split()
        for key in l1_key:
            for value in l2_value:
                if value.isdigit():
                    value = int(value)
                if value in dic.values():
                    pass
                else:
                    dic.setdefault(key,value)
        li.append(dic)
    print(li)

方法二：
with open("第四题",encoding="utf-8") as f1:
    l1_key = f1.readline().split()
    li = []
    for line in f1:
        dic = {}
        l2_value = line.split()
        for i in range(len(l1_key)):
            dic[l1_key[i]] = l2_value[i]
        li.append(dic)
    print(li)