readme：
1. 员工信息表程序，实现增删改查操作：
1).可进行模糊查询，语法至少支持下面3种:
select name,age from staff_table where age > 22
select * from staff_table where dept = "IT"
select * from staff_table where enroll_date like "2013"
最后显示有查到的条数
2).可创建新员工纪录，以phone做唯一键，staff_id需自增
3).可删除指定员工信息纪录，输入员工id，即可删除
4).可修改员工信息，语法如下:
UPDATE staff_table SET dept="Market" WHERE dept = "IT"
流程图：
I-Shop购物系统
下载
部分功能简介：商品收藏夹功能热门商品最新商品分级价格功能自选风格打印结算页面内部短信箱商品评论增加上一商品，下一商品功能增强商家提示功能友情链接用户在线统计用户来访统计用户来访信息用户积分功能广告设置用户组分类邮件系统后台实现更新用户数据系统图片设置模板管理CSS风格管理申诉内容过滤功能用户注册过滤特征字符IP库管理及来访限制及管理压缩，恢复，备份数据库功能上传文件管理商品类别管理商品添加/修改/
代码：
# coding:utf8import sysimport redef select(staff, field):
cmd = input("cmd>").strip()
cmd = cmd.replace('FROM', 'from')
cmd = cmd.replace('WHERE', 'where')if '*' in cmd:for i in field.keys():
sys.stdout.write(str(i) + ' ')print('')for line in staff:
info_list = re.split(r',+', line.strip('\n'))
cmd_list = re.split(r'[ ,;]+', cmd)
f_index = cmd_list.index('from')
search_field = cmd_list[1:f_index]
from_field = cmd_list[f_index + 1]if from_field != 'staff_table':print('\033[31;1mplease select `staff_table`...\033[0m')breakif 'where' not in cmd_list:# 不存在where条件，显示所有view_list = []for i in range(len(search_field)):if search_field[i] == '*':
view_list = info_list[:]else:
view_list.append(info_list[field.get(search_field[i])])else:print(','.join(view_list))else:# 存在where条件w_index = cmd_list.index('where')
where_str = ''.join(cmd_list[w_index + 1:])if re.search(r'like', where_str):
sizeof = 'like'where_list = re.split(r'like', where_str)else:
sizeof = re.search(r'[=><]+', where_str).group()
where_list = re.split(r'[=><]+', where_str)
where_field = where_list[0]
value = where_list[1]if re.search(r'[\'\"]+', value): # 带'和"的表示字符,处理掉'和"value = value.replace('\"', '')
value = value.replace('\'', '')else:
value = float(value)# print(where_str, where_field, sizeof, value)# 条件判断 >, <, =, likeif sizeof == '>':
v = info_list[field.get(where_field)]if float(v) > value:
view_list = []for i in range(len(search_field)):if search_field[i] == '*':
view_list = info_list[:]else:
view_list.append(info_list[field.get(search_field[i])])else:print(','.join(view_list))elif sizeof == '<':
v = info_list[field.get(where_field)]if float(v) < value:
view_list = []for i in range(len(search_field)):if search_field[i] == '*':
view_list = info_list[:]else:
view_list.append(info_list[field.get(search_field[i])])else:print(','.join(view_list))elif sizeof == '=':
v = info_list[field.get(where_field)]if field.get(where_field) == 2:
v = float(v)if v == value:
view_list = []for i in range(len(search_field)):if search_field[i] == '*':
view_list = info_list[:]else:
view_list.append(info_list[field.get(search_field[i])])else:print(','.join(view_list))elif sizeof == 'like':
v = info_list[field.get(where_field)]if value in v:
view_list = []for i in range(len(search_field)):if search_field[i] == '*':
view_list = info_list[:]else:
view_list.append(info_list[field.get(search_field[i])])else:print(','.join(view_list))else:passdef add(staff):
staff.sort()
num = int(re.split(r',', staff[-1])[0]) + 1phone = input("phone:").strip()for line in staff:if phone == line[3]:print("already exists...")return Falseif not re.match(r'^\d+$', phone) or len(phone) < 7:print("format error...")return False
name = input("name:").strip()
age = input("age:").strip()
dept = input("dept:").strip()
enroll_date = input("enroll_date:").strip()for s in (name, age, dept, enroll_date):if not len(s):print("input is null...")return Falseelse:
staff.append('%s,%s,%s,%s,%s,%s\n' % (num, name, age, phone, dept, enroll_date))return staffdef update(staff, field):
cmd = input("cmd>").strip()
up_list = []
cmd = cmd.replace('SET', 'set')
cmd = cmd.replace('WHERE', 'where')for line in staff:
info_list = re.split(r',+', line.strip('\n'))
cmd_list = re.split(r'[ ,;]+', cmd)if cmd_list[1] != 'staff_table':print('\033[31;1mplease update `staff_table`...\033[0m')breakset_index = cmd_list.index('set')
where_index = cmd_list.index('where')
set_list = re.split(r'=', ''.join(cmd_list[set_index + 1:where_index]))
set_field = set_list[0]
set_value = set_list[1]if re.search(r'[\'\"]+', set_value):
set_value = set_value.replace('\'', '')
set_value = set_value.replace('\"', '')
where_list = re.split(r'=', ''.join(cmd_list[where_index + 1:]))
where_field = where_list[0]
where_value = where_list[1]if re.search(r'[\'\"]+', where_value):
where_value = where_value.replace('\'', '')
where_value = where_value.replace('\"', '')if info_list[field.get(where_field)] == where_value:
info_list[field.get(set_field)] = set_valueprint(','.join(info_list))
up_list.append(','.join(info_list))else:return up_listdef delete(staff):
del_id = input("delete id:").strip()for i in range(len(staff)):if re.split(r',', staff[i])[0] == del_id:
staff.pop(i)print("id:%s delete success." % del_id)return staffelse:return Falsedef main():
staff_table = 'staff_table.txt'field = {'staff_id': 0,'name': 1,'age': 2,'phone': 3,'dept': 4,'enroll_date': 5}
menu = '''\033[33;1m-- staff_table --\033[0m\033[29;1m
S. 查询 h. 帮助
A. 新增 q. 退出
E. 修改
D. 删除\033[0m'''print(menu)while True:try:
with open(staff_table, 'r') as f:
staff = f.readlines()
choice = input(">>").strip().lower()if choice == 'h': # helpprint(menu)elif choice == 'q':breakelif choice == 's': # search select(staff, field)elif choice == 'a': # addresult = add(staff)if not result:print('\033[31;1madd failed...\033[0m')continueelse:
with open(staff_table, 'w') as f:
f.writelines(result)elif choice == 'e': # updateresult = update(staff, field)if not result:print('\033[31;1mupdate failed...\033[0m')continueelse:
with open(staff_table, 'w') as f:for line in result:
f.write(line + '\n')elif choice == 'd': # deleteresult = delete(staff)if not result:print('\033[31;1mdelete failed...\033[0m')continueelse:
with open(staff_table, 'w') as f:
f.writelines(result)else:continueexcept:print("\033[31;1minput error...\033[0m")continueif __name__ == '__main__':
main()
View Code
