原文件（数据已经脱敏）：
staff_id,name,age,phone,dept,enroll_date
1,姬建明,25,152015410,运维,2013-11-01
2,刘海龙,26,186184177,运维,2012-12-25
3,闫培飞,25,157016802,IT,2015-10-14
4,孙海涛,33,158206312,IT,2005-09-27
5,张亚磊,24,137338110,IT,2014-06-23
6,张松,26,136837094,IT,2013-10-08
7,刘文剑,25,155550213,SA,2014-05-21
8,魏曼,18,189108670,运维,2014-05-21
9,宋晓楠,18,110168082,测试,2014-05-21
10,吴东杭,21,177108908,运维,1995-08-29
11,李静,18,186127011,测试,2015-08-20
12,文鑫,23,181805410,无,2016-7-31
13,于洪林,31,133232639,运维,2013-6-24
14,王新凯,22,169965127,运维,2015-10-31
15,盖爽,18,185003763,运维,2015-10-28
16,张振兴,27,135214320,运维,2015-10-28
17,侯梓煜,21,186819511,运维,2016-10-31
18,张玉新,27,101241184,运维,2015-10-28
19,纪冠宇,24,150113743,运维,2015-11-12
20,李乾龙,24,185105376,运维,2015-7-13
21,杨洋,21,188131922,运维,2015-1-1
22,张泽伟,27,101029861,无,2011-2-1 如下是要求：
# 有以下员工信息表staff_table
# 1, AlexLi, 22, 13651054608, IT, 2013-04-01
# 现需要对这个员工信息文件，实现增删改查操作
# 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"
# 查到的信息，打印后，最后面还要显示查到的条数
# 可创建新员工纪录，以phone做唯一键，staff_id需自增
# 可删除指定员工信息纪录，输入员工id，即可删除
# 可修改员工信息，语法如下:
# UPDATE staff_table SET dept = "Market" where dept = "IT"
# 注意：以上需求，要充分使用函数，请尽你的最大限度来减少重复代码！
# select * from staff_table where age < 25
自己写的代码，替换和删除后续补上：
#查询函数
def select(column,term=[],symbol=[],option=[]):
f=open("staff_table","r",encoding="utf-8")
object = f.readline().strip().split(",") #查询column为*，不带条件，比如:select * from staff_table
if column == "*" and not term and not symbol and not option:
for line in f:
object = line.strip().split(",")
print("%s %s %s %s %s %s" % (object[0], object[1], object[2], object[3], object[4], object[5]))
exit() #查询column为*，带条件，比如:select * from staff_table where age > 25
if column == "*" and term:
show_list=[]
position = object.index(term)
for line in f:
object = line.strip().split(",")
if object[0].isdigit:
if symbol == "=":
if object[position] == option.strip('\"'):
show_list.append(object)
elif symbol == ">":
if object[position] > option.strip('\"'):
show_list.append(object)
elif symbol == "<":
if object[position] < option.strip('\"'):
show_list.append(object)
elif symbol == ">=":
if object[position] >= option.strip('\"'):
show_list.append(object)
elif symbol == "<=":
if object[position] <= option.strip('\"'):
show_list.append(object)
elif symbol == "like":
if option.strip('\"') in object[position]:
show_list.append(object)
i = 0
for i, ele in enumerate(show_list):
print("%s %s %s %s %s %s" % (ele[0], ele[1], ele[2], ele[3], ele[4], ele[5]))
print("共%s位成员%s %s %s" % (i + 1, term, symbol, option))
exit() # 查询column为自选，不带条件，比如:select name,age,dept from staff_table
if column != "*" and not term and not symbol and not option:
column = column.split(",")
position_list = []
show_list1 = []
show_list2 = []
for i in range(0,len(column)):
position = object.index(column[i])
position_list.append(position)
for line in f:
object = line.strip().split(",")
for i in range(0,len(position_list)):
show_list1.append(object[position_list[i]])
show_list2.append(show_list1)
show_list1 = []
for i in show_list2:
print(i)
exit() # 查询column为自选，带条件，比如:select name,age,dept from staff_table where dept = "运维"
if column != "*" and term:
show_list=[]
position = object.index(term)
for line in f:
object_data = line.strip().split(",")
if object_data[0].isdigit:
if symbol == "=":
if object_data[position] == option.strip('\"'):
show_list.append(object_data)
elif symbol == ">":
if object_data[position] > option.strip('\"'):
show_list.append(object_data)
elif symbol == "<":
if object_data[position] < option.strip('\"'):
show_list.append(object_data)
elif symbol == ">=":
if object_data[position] >= option.strip('\"'):
show_list.append(object_data)
elif symbol == "<=":
if object_data[position] <= option.strip('\"'):
show_list.append(object_data)
elif symbol == "like":
if option.strip('\"') in object_data[position]:
show_list.append(object_data)
column = column.split(",")
position_list = []
show_list1 = []
show_list2 = []
for i in range(0,len(column)):
position = object.index(column[i])
position_list.append(position)
for j in range(0,len(show_list)):
for i in range(0,len(position_list)):
show_list1.append(show_list[j][position_list[i]])
show_list2.append(show_list1)
show_list1 = []
for i in show_list2:
print(i)
exit() #插入函数：
def insert(name,age,phone,dept,enroll_date):
f = open("staff_table","r",encoding="utf-8")
num = 0
for line in f:
object = line.strip().split(",")
if phone == object[3]:
print("手机号重复，无法插入")
exit()
num = object[0]
f.close()
num = int(num)
num = num + 1
num = str(num)
name = name.strip('\"')
age = str(age)
phone = str(phone)
dept = dept.strip('\"')
enroll_date = enroll_date.strip('\"')
new_line = "\n"+num+","+name+","+age+","+phone+","+dept+","+enroll_date
f = open("staff_table","a",encoding="utf8")
f.write(new_line)
f.close() def update():
pass def delete():
pass msg = """
请选择：
1.查询
2.插入
3.更新
4.删除
5.退出
"""
main_dic = {
"":select,
"":insert,
"":update,
"":delete,
"":exit
} while True:
f = open("staff_table","r",encoding="utf-8")
print("成员表如下".center(40, "*"))
for line in f:
object = line.strip().split(",")
print("%s %s %s %s %s %s" % (object[0],object[1],object[2],object[3],object[4],object[5]))
print(msg)
column=[]
term=[]
symbol=[]
option=[]
choice = input("what do you want :")
if len(choice) == 0 or choice not in main_dic:continue
if choice == "":break
if choice == "":
select_sql = input("查询语句 ：")
select_sql_list=select_sql.split(" ")
column = select_sql_list[1]
if len(select_sql_list) > 7:
term = select_sql_list[5]
symbol = select_sql_list[6]
option = select_sql_list[7]
main_dic[""](column,term,symbol,option)
if choice == "":
insert_sql = input("插入语句 ：")
insert_sql_list = insert_sql.split(" ")
# insert into staff_table values ("terry",22,13333333,"it","2013-1-1")
column_str = insert_sql_list[4]
column_list = column_str.lstrip("(").rstrip(")").split(",")
name = column_list[0]
age = column_list[1]
phone = column_list[2]
dept = column_list[3]
enroll_date = column_list[4]
main_dic[""](name,age,phone,dept,enroll_date)