FILENAME='products.json'
#常量
import json
def get_file_content():
with open(FILENAME,encoding='utf-8') as f :
content = f.read()
if len(content)>0:
res = json.loads(content)
else:
res = {}
return res
def write_file_content(dic):
with open(FILENAME,'w',encoding='utf-8') as fw:
json.dump(dic,fw,indent=4,ensure_ascii=False)
def check_digit(st:str):
if st.isdigit():
st = int(st)
if st>0:
return st
else:
return 0
else:
return 0
def add_product():
product_name = input('请输入商品名称：').strip()
count = input('请输入商品数量：').strip()
price = input('请输入商品价格：').strip()
all_products = get_file_content()
if check_digit(count) == 0:
print('数量输入不合法')
elif check_digit(price) == 0:
print('价格输入不合法')
elif product_name in all_products:
print('商品已经存在')
else:
all_products[product_name] = {"count":int(count),
"price":int(price)}
write_file_content(all_products)
print('添加成功！')
def show_product():
product_name = input('请输入要查询的商品名称：').strip()
all_products = get_file_content()
if product_name=='all':
print(all_products)
elif product_name not in all_products:
print('商品不存在')
else:
print(all_products.get(product_name))
def del_product():
product_name = input('请输入要删除的商品名称：').strip()
all_products = get_file_content()
if product_name in all_products:
all_products.pop(product_name)
print('删除成功')
write_file_content(all_products)
else:
print('商品不存在')
choice = input('请输入你的选择:\n 1、添加商品 2、删除商品 3、查看商品信息')
if choice=="1":
add_product()
elif choice=="2":
del_product()
elif choice=="3":
show_product()
else:
print('输入错误，请重新输入！')
