在python中调试代码

Question

I am writing some code to do this: fill an array with numbers from 0 to 9 and then put the ones smaller than 5 at the end of it. My code is this:

    print ("give n: ")
    n = int(input())
    a = []
    for i in range(n):
        num = 0
        print ("give a number from 0 to 9 ")
        num = int(input())
        while (num > 9 and num < 0):
            print ("only from 0 to 9")
            num = int(input())
        a.append(num)
    tmp = 0
    for i in range(n):
        if (a[i]<5):
            tmp = a[i]
            a[i] = a[i+1]
            a[i+1] = tmp
    for i in range(n):
        print a[i]

My problem is that when i run it, the loop that checks if a number is from 0 to 9 is ignored if i give anything else and it passes it to the array and that it gives me an error on line 16 (a[i] = a[i+1]). Thanks in advance!

Answer 1

有适用于python的调试器： https : //docs.python.org/3/library/pdb.html可能对于一开始就学习它很有用。

Answer 2

For debugging in Python. Add import pdb and then put pdb.set_trace() where you want the debugger to break.