Regular expressions work - Calculator

dic = {'id': 0, 'name': 1, 'age': 2, 'phone': 3, 'job': 4}

def add_info(filename):
    user_info = []
    with open(filename, 'r', encoding='utf-8') as f:
        lines = f.readlines()
        last_line = lines[-1]
        id_max = last_line[dic['id']]
         IF id_max.isdigit (): 
            ID = int (id_max) +. 1 
            user_info.append (STR (ID)) 

        name = INPUT ( ' Enter your name: ' ) .strip ()
         IF name.isspace ():
             Print ( ' name can not be empty ' )
         the else : 
            user_info.append (name) 

        Age = the iNPUT ( ' Please enter ages: ' ) .strip ()
         IF age.isspace ():
             Print ( ' Age can not be empty ' )
         elif  notage.isdigit ():
             Print ( ' ages must be numeric ' )
         the else : 
            user_info.append (Age) 

        Phone = the INPUT ( ' Please enter the phone: ' ) .strip ()
         IF phone.isspace ():
             Print ( ' phone can not empty ' )
         elif  not phone.isdigit ():
             Print ( ' phone numbers must consist of all ' )
         the else : 
            user_info.append (phone) 

        the job = the iNPUT ( ' Please enter the work:' ) .Strip ()
         IF job.isspace ():
             Print ( ' work can not be empty ' )
         the else : 
            user_info.append (Job) 

    with Open (filename, ' A ' , encoding = ' UTF-. 8 ' ) AS F: 
        info = ' , ' .join (USER_INFO)
         IF f.writable ():
             IF f.write (info)> 0:
                 Print ( ' user [% s] information added successfully! ' % name) 


DEF del_info():
    pass

def read_file(filename):
    with open(filename, encoding='utf-8') as f:
        for line in f:
            line = line.strip()
            line_list = line.split(',')
            yield line_list


def cond_filter(condition, filename):
    condition = condition.strip()
    if '>=' in condition:
        condition = condition.split('>=')
        col = condition[0].strip()
        val = condition[1].strip()

        g = read_file(filename)
        for line_list in g:
            if int(line_list[dic[col]]) >= int(val):
                yield line_list
    elif '<=' in condition:
        condition = condition.split('<=')
        col = condition[0].strip()
        val = condition[1].strip()

        g = read_file(filename)
        for line_list in g:
            if int(line_list[dic[col]]) <= int(val):
                yield line_list
    elif '>' in condition:
        condition = condition.split('>')
        col = condition[0].strip()
        val = condition[1].strip()

        g = read_file(filename)
        for line_list in g:
            if int(line_list[dic[col]]) > int(val):
                yield line_list
    elif '<' in condition:
        condition = condition.split('<')
        col = condition[0].strip()
        val = condition[1].strip()

        g = read_file(filename)
        for line_list in g:
            if int(line_list[dic[col]]) < int(val):
                yield line_list
    elif 'like' in condition:
        condition = condition.split('like')
        col = condition[0].strip()
        val = condition[1].strip()

        g = read_file(filename)
        for line_list in g:
            if val in line_list[dic[col]]:
                yield line_list
    else:
        print('查询暂时只支持>=、<=、>、<、like')


def print_info(col_lst, staff):
    if ' * '  In col_lst: 
        col_lst = dic.keys () 

    for   I in col_lst:
         Print (I, End = ' \ T \ T \ T ' )
     Print ( '' ) 

    for staff_info in Staff:
         for I in col_lst:
             Print ( staff_info [dic [i.strip ()]], End = ' \ t \ t \ t ' )
         Print ( '' ) 


Print ( " Please select your function: [1] [2] new user information delete user information [3] query user information [exit] to exit")
choose = input("请选择你的功能：").strip()
while True:
    ret = input(">>>").lower()
    if 'exit'.lower() == ret.strip():
        break

    if choose == '3':
        if 'where' in ret:
            select, where = ret.split('where')
            select, table = select.split('from')
            cols = select.replace('select', '').strip()
            cols = cols.split(',')
            g = cond_filter(where.strip(), table.strip())
            print_info(cols, g)
        else:
            select, table = ret.split('from')
            cols = select.replace('select', '').strip()
            cols = cols.split(',')
            g = read_file(table.strip())
            print_info(cols, g)
        ret = input(">>>")
    elif choose == '1':
        add_info('userinfo')
        ret = input(">>>")