字母'n'在Python中是无效的语法？

Question

它在我的程序中早先作为变量名称工作现在突然Python在我的程序中将字母'n'作为无效语法返回。

知道原因，以及如何解决这个问题？

bad_input=True
while bad_input:
    bad_input=False
    User_Choice=int(input('Which frame would you like to choose(1,2,3 represent positive selections, 4,5,6 represent -1,-2, and -3 respectively')
    n = 3
    if User_Choice== int(1):
        Chunks=[RNA_Comp[i:i+n] for i in range(0, len(RNA_Comp), n)]
    if User_Choice== int(2):
        Chunks=[RNA_Comp[i:i+n] for i in range(1, len(RNA_Comp), n)]
    if User_Choice== int(3):
        Chunks=[RNA_Comp[i:i+n] for i in range(2, len(RNA_Comp), n)]
    else:
        print('Please select an integer value from 1 to 6')
        bad_input=True

Answer 1

您忘记在)

之前的行中关闭n = 3