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Python_zipfile\tarfile及购物车小程序分解

# ### tarfile  .tar | .tar.gz | .tar.bz2
import tarfile
"""官方说法, .tar.bz2 的压缩算法,包的大小最小."""

# 1.压缩文件
# (1) 创建tar压缩包  # 10240
tf = tarfile.open("ceshi0513.tar","w",encoding="utf-8")
# (2) 添加文件打包
# add(路径,别名)
tf.add(r"E:\python30\day17\ceshi100\1.txt","1.txt")
tf.add(r"E:\python30\day17\ceshi100\2.txt","222")
tf.add(r"E:\python30\day17\ceshi100\3.py","/tmp/3.py")
# (3) 关闭文件
tf.close()

# .tar.gz 的压缩包 # 245
tf = tarfile.open("ceshi0514.tar.gz","w:gz",encoding="utf-8")
tf.add(r"E:\python30\day17\ceshi100\1.txt","1.txt")
tf.add(r"E:\python30\day17\ceshi100\2.txt","222")
tf.add(r"E:\python30\day17\ceshi100\3.py","/tmp/3.py")
tf.close()

# .tar.bz2 的压缩包 # 240  理论上 , 压缩出来的包最小.
tf = tarfile.open("ceshi0515.tar.bz2","w:bz2",encoding="utf-8")
tf.add(r"E:\python30\day17\ceshi100\1.txt","1.txt")
tf.add(r"E:\python30\day17\ceshi100\2.txt","222")
tf.add(r"E:\python30\day17\ceshi100\3.py","/tmp/3.py")
tf.close()
"""
import zipfile
# (1) 创建压缩包 345
zf = zipfile.ZipFile("ceshi0512.zip","w",zipfile.ZIP_DEFLATED)
zf.write(r"E:\python30\day17\ceshi100\1.txt","1.txt")
zf.write(r"E:\python30\day17\ceshi100\2.txt","222")
zf.write(r"E:\python30\day17\ceshi100\3.py","/tmp/3.py")
zf.close()
"""


# 2.解压文件
tf = tarfile.open("ceshi0514.tar.gz","r",encoding="utf-8")
#extractall(路径)      解压所有文件到某个路径下
# tf.extractall("ceshi500")
#  extract(文件,路径)    解压指定的某个文件到某个路径下
tf.extract("222","ceshi600")
tf.close()


# 3.追加文件
"""只能对w模式下的打包进行追加,其他的模式不行"""
with tarfile.open("ceshi0513.tar","a",encoding="utf-8") as tf:
	tf.add(r"E:\python30\day17\ceshi100\4.php","4.php")

# 对于tar.gz  或者 tar.bz2已经压缩过的包无法追加文件
"""
with tarfile.open("ceshi0514.tar.gz","a",encoding="utf-8") as tf:
	tf.add(r"E:\python30\day17\ceshi100\4.php","4.php")
"""
# 4.查看压缩包
with tarfile.open("ceshi0513.tar","r",encoding="utf-8") as tf:
	lst = tf.getnames()

print(lst)


# ### 对tarfile 不能追加的文件的bug 进行优化.
"""
tarfile 的解决方法   文件或者文件夹都可以通过add放到压缩包中
(1) 先解压原来的压缩包
(2) 把要追加的内容放进去
(3) 过滤数据,重新打包
"""
import os
pathvar = os.getcwd()
print(pathvar) # E:\python30\day17

# 压缩包的路径
pathvar1 = os.path.join(pathvar,"ceshi0515.tar.bz2")
print(pathvar1)
# 解压文件夹的路径
pathvar2 = os.path.join(pathvar,"ceshi0515")
print(pathvar2)


# 1.先解压压缩包
with tarfile.open(pathvar1,"r",encoding="utf-8") as tf:
	tf.extractall(pathvar2)

# 2.把追加的内容放进来
import shutil
shutil.copy(r"E:\python30\day17\ceshi100\4.php",pathvar2)

# 3.过滤数据,重新打包
"""过滤掉222这个文件,剩下的文件重新打包"""
lst = os.listdir(pathvar2)
print(lst) # ['1.txt', '222', '4.php', 'tmp']

with tarfile.open(pathvar1,"w:bz2",encoding="utf-8") as tf:
	for i in lst:
		# print(i)
		pathnew = os.path.join(pathvar2,i)
		print(pathnew)
		# add(路径,别名)
		if i != "222":
			tf.add(pathnew,i)

           
# ### zipfile 后缀是zip
import zipfile

# 1.压缩文件
# (1) 创建压缩包 619
zf = zipfile.ZipFile("ceshi0512.zip","w",zipfile.ZIP_DEFLATED)

# (2) 把文件写入到压缩包当中
# write(路径,别名)
zf.write(r"E:\python30\day17\ceshi100\1.txt","1.txt")
zf.write(r"E:\python30\day17\ceshi100\2.txt","2.txt")
# 可以允许临时创建一个文件夹tmp
zf.write(r"E:\python30\day17\ceshi100\3.py","/tmp/3.py")

# (3) 关闭压缩文件
zf.close()

# 2.解压文件
zf = zipfile.ZipFile("ceshi0512.zip","r")
# ./代表相对于当前路径
# zf.extractall("./ceshi300")
# zf.extract(文件,文件夹)
zf.extract("1.txt","./ceshi400")
zf.close()


# 3.追加文件
zf = zipfile.ZipFile("ceshi0512.zip","a",zipfile.ZIP_DEFLATED)
zf.write(r"E:\python30\day17\ceshi100\4.php","4.py")
zf.close()

# 使用with语法进行优化 (可以省略close操作) 推荐
with zipfile.ZipFile("ceshi0512.zip","a",zipfile.ZIP_DEFLATED) as zf:
	zf.write(r"E:\python30\day17\ceshi100\4.php","6666.py")


# 4.查看文件
with zipfile.ZipFile("ceshi0512.zip","r",zipfile.ZIP_DEFLATED) as zf:
	lst = zf.namelist()
print(lst)


           
# ### 购物车 作业要求：(用函数写)

# 1. 用户先给自己的账户充钱：比如先充3000元。
# 2. 页面显示 序号 + 名称 + 价格 , 如：
# [===========有如下商品供您选择：===========]
# 序号     名称       价格
# 1 		 电脑		1999
# 2 		 鼠标		10
# 3 		 游艇		20
# 4 		 美女		998
# n或N	购物车结算
# q或Q	退出程序(如不结算购物车可直接退出)]
# [==========================================]
# 购物车结算
# 3. 用户输入选择的商品序号，然后打印商品名称及商品价格,并将此商品，添加到购物车，用户还可继续添加商品。
# 4. 如果用户输入的商品序号有误，则提示输入有误，并重新输入。
# 5. (1)用户输入n为购物车结算，依次显示用户购物车里面的商品，数量及单价
#    (2)若充值的钱数不足则让用户删除某商品，直至可以购买，若充值的钱数充足，则可以直接购买退出
#    (3)退出程序之后，依次显示用户购买的商品，数量，单价，以及此次共消费多少钱，账户余额多少
# 6. 用户输入Q或者q 直接退出程序。
           
# ### 购物车小程序
import json
import time

money = 0
goods_lst = []

# 定义一个购物车字典
car = {}
"""
car = {
1:{电脑... }
2:{鼠标...}
}
"""

with open("shopping_data.json", mode="r+", encoding="utf-8") as fp:
	for i in fp:
		dic = json.loads(i)
		goods_lst.append(dic)
print(goods_lst)
"""
[
	0 {'name': '电脑', 'price': 1999}, 1
	1 {'name': '鼠标', 'price': 10},   2
	2 {'name': '游艇', 'price': 20},   3
	3 {'name': '美女', 'price': 998},  4 
	4 {'name': '风油精', 'price': 30}  5
]
"""


def progress(percent):
	if percent > 1:
		percent = 1

	strvar = int(50 * percent) * "#"
	print("\r[%-50s] %d%%" % (strvar, int(100 * percent)), end="")


def exe_progress():
	recv_size = 0
	# 假设文件总大小是 1028000
	total_size = 1028000
	while recv_size < total_size:
		time.sleep(0.01)

		# 一次接受的字节数是1024
		recv_size += 6000
		percent = recv_size / total_size
		progress(percent)


# 充值
def recharge():
	global money
	while True:
		num = input("请充值吧,大哥")
		if num.isdecimal():
			print("恭喜你~ 充值成功{}元人民币".format(num))
			break
		else:
			print("充值失败,非数字.")


# 加载
def loading():
	print("加载商品中 ... ")
	exe_progress()
	print()


# 展示
def show_goods():
	strvar = "{}".format("商品名称").center(18)
	print("序号" + strvar + "价格")
	# 打印对应的商品

	for k, v in enumerate(goods_lst, start=1):
		# print(k,v)
		v['num'] = k
		strvar = "{v[num]:<10}{v[name]:<12}{v[price]}".format(v=v)
		print(strvar)


def error():
	strvar = """
**************************************************
*           您输入的选项不存在 , 请重新输入          *
**************************************************	
"""
	print(strvar)
	time.sleep(1)


def add_car(num):
	if num not in car:
		car[num] = {
			"name": goods_lst[num - 1]["name"],
			"price": goods_lst[num - 1]["price"],
			"account": 1
		}
	else:
		car[num]["account"] += 1

	print(car)
	"""
	{
		序号: 商品描述(字典形式展现)
		2: {'name': '鼠标', 'price': 10, 'account': 1}, 
		3: {'name': '游艇', 'price': 20, 'account': 1}
	}
	"""


def show_car(num):
	print("*" * 50)
	print("您选择的商品具体信息:")
	print("*-商品名称:{}".format(car[num]["name"]))
	print("*-商品单价:{}".format(car[num]["price"]))
	print("*-商品数量:{}".format(car[num]["account"]))
	print("已成功添加到购物车~ 请继续shopping ~")
	print("*" * 50)


# 主文件调用
def main():
	# 1.充值
	recharge()
	# 2.加载中
	loading()
	# 3.展示商品
	show_goods()
	# 4.开始购物
	sign = True
	while sign:
		num = input("请输入您要购买的商品:")
		if num.isdecimal():
			num = int(num)
			add_car(num)
			show_car(num)


		elif num.upper() == "N":
			pass
		elif num.upper() == "Q":
			pass
		else:
			# 报错
			error()


main()
Python
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