在循环外打印最终声明

Question

I'm trying to print a final statement that says "The 50th bus arrives at HH:MM." But it appears my print statement is still in my for loop. How do I get it out of it? Also, it seems like my output is still in brackets. I'm not sure how to get rid of that. Sorry, I'm very new to programming.

import numpy as np
import math
import random

l=[]
for i in range (50):
    def nextTime(rateParameter):
        return -math.log(1.0 - random.random()) / rateParameter
    a = np.round(nextTime(1/15),0)
    l.append(a)
cum_l = np.cumsum(l)
print(cum_l)

print("The 50th bus arrives at ", cum_l//60,":", cum_l%60,2)

Answer 1

Print is not in for loop. The reason you think that your print is in for loop is because you print cum_l which is a list . But you need only last element:

import numpy as np
import math
import random

rateParameter = 1/15

def nextTime(rateParameter):
        return -math.log(1.0 - random.random()) / rateParameter

l=[]
for i in range (50):
    a = np.round(nextTime(rateParameter), 0)
    l.append(a)

cum_l = np.cumsum(l)
#print(cum_l)

output = ""
last = len(cum_l) - 1

output += str(cum_l[-1]//60) + ":" + str(cum_l[-1]%60)

print("The 50th bus arrives at: ", output)