Python 交互窗口不断打开或运行脚本

Question

I keep trying to run this loop, which is meant to register numbers above or below 50 in a random set of 10 loops.

import random, string
N = random.sample(range(1,100),10)
if N > 50
        cntOver += 1
if N <= 50
        cntUnder += 1
cntOver = 0; cntUnder = 0
print cntOver, cntUnder

I'm not sure if I wrote something wrong with it, but every time I try to run it with Python's interactive window, it just opens up the script file instead of running it. I admit I am a complete novice here, so if the solution is simple don't be afraid to call me dim.

Answer 1

1. N is a list, so you can not compare N with 50. You should use a for-loop.
2. You should initialize cntOver and cntUnder first. Therefore, the correct way is following:

import random, string
N = random.sample(range(1,100),10)
cntOver = 0; cntUnder = 0
for i in N:
    if i > 50:
        cntOver += 1
    if i <= 50:
        cntUnder += 1
print (cntOver, cntUnder)

The better way is using the built-in function sum(), where we can use list as an input. check how to use it: https://www.w3schools.com/python/ref_func_sum.asp

import random, string
N = random.sample(range(1,100),10)
cntOver = sum(i > 50 for i in N)
cntUnder = sum(i <= 50 for i in N)
print (cntOver, cntUnder)