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+--- Thread: Randomly generate an even number (/thread-17581.html)
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Randomly generate an even number - Truman - Apr-17-2019
How would you randomly generate an even number x, 0 <= x < 100? Fill out the definition for the function genEven(). Please generate a uniform distribution over the even numbers between 0 and 100 (not including 100).
my try:
import random
def genEven():
'''
Returns a random even number x, where 0 <= x < 100
'''
# Your code here
rn = random.choice(range(0, 100, 2))
print(rn)Error:70
TypeError: unorderable types: NoneType() < intRE: Randomly generate an even number - ichabod801 - Apr-17-2019
I take it you are submitting this to a program that checks if your code works correctly. In that case, I bet you need to
return rn, not print it. Without an explicit return statement, your function returns None.
RE: Randomly generate an even number - Truman - Apr-17-2019
Yes, you're correct.
next task is a bit more difficult:
Write a uniformly distributed stochastic program, stochasticNumber, that returns an even number between 9 and 21.
import random
def stochasticNumber():
'''
Stochastically generates and returns a uniformly distributed even number between 9 and 21
'''
# Your code here
return [x for _ in range(9,22) for x in [random.randint(9,22)] if x % 2 I googled similar solution but it is not accepted. Error is the same as in the first case.
RE: Randomly generate an even number - ichabod801 - Apr-17-2019
I don't understand why you aren't just using the same solution as for the first part. Why the double loop? You also appear to be returning a list, not a number. However, there is a missing ']', is there more missing code there?
RE: Randomly generate an even number - Truman - Apr-17-2019
I just didn't copy it correctly. In this program, I submitted with ']'. Will follow your suggestion.
RE: Randomly generate an even number - Skaperen - Apr-17-2019
even_random_number = random_number*2 even_random_number = odd_random_number+1 even_random_number = odd_random_number+another_odd_random_number
RE: Randomly generate an even number - DeaD_EyE - Apr-17-2019
import random
NUMBERS = list(range(2, 100, 2)) # 2, 4, ... 98
def rnd_even():
return random.choice(NUMBERS)
even_random_vals = [rnd_even() for _ in range(10)]With so less numbers, you can prepare a list with even numbers an let random.choice choose values.PS: If you need guaranteed entropy (encryption), this is the wrong way.
RE: Randomly generate an even number - ankit - Apr-17-2019
hi dear,
here is my code for your question ,
import random
random.randrange(0,100,2)
RE: Randomly generate an even number - Truman - Apr-17-2019
Hi Everybody,
Forgot to mention that in this second assignment even number between 9 and 21 should be returned.
The first problem is already solved. :)
and the second one:
import random
def stochasticNumber():
'''
Stochastically generates and returns a uniformly distributed even number between 9 and 21
'''
# Your code here
for x in range(14):
rn = random.choice(range(9, 22))
if rn % 2 == 0:
return rn
RE: Randomly generate an even number - Skaperen - Apr-17-2019
i like
random.randrange(10,22,2). it's 2 characters shorter and more concise (eliminates 2 lines ... it can be returned directly). i don't know if that makes it more pythonic, but i would hope so.