python学生管理システム1.0バージョン

#       
list_stuInf = []
#     
def add() :
    #          
    while True:
        #             
        name = input('          ,q    :')
        #          q       
        if name == 'q':
            break
        else:
            #            
            list_stuInf.append(name)
            print(list_stuInf)
            continue
#     
def modify():
    #             
    for x in range(0, len(list_stuInf)):
        rs = list_stuInf[x]
        x = x + 1
        print('  :%s    :%s' % (x, rs))
    while True:
        #           
        y = int(input('         :'))

        #          
        if y > x:
            y = int(input('     ,     :'))
        else:
            #      
            a = input('       :')
            y = y - 1
            list_stuInf[y] = a
            break
#     
def delInf():
    #             
    for x in range(0, len(list_stuInf)):
        rs = list_stuInf[x]
        x = x + 1
        print('  :%s    :%s' % (x, rs))
    #           ,         
    while True:
        #           
        z = int(input('         :'))

        #          
        if z > x:
            y = int(input('     ,     :'))
        else:
            #       
            z = z - 1
            del list_stuInf[z]
            break

#    
def display():
    for x in range(0, len(list_stuInf)):
        rs = list_stuInf[x]
        x = x + 1
        print('  :%s    :%s' % (x, rs))

while True:
    print('      1.0  :')
    print('1.    ')
    print('2.    ')
    print('3     3.1      ')
    print('4.    ')
    print('0.  ')

    select = int(input('     :'))
    while select < 0 or select >4:
        select = float(input('    ,   '))
    if select == 1:
        #    
        add()
    if select == 2:
        modify()
    if select == 3:
        delInf()
    if select == 4:
        display()
    if select == 0:
        print('      !')
        break