why does random give duplicate values [duplicate]

This question already has an answer here:

• Changing one list unexpectedly changes another, too [duplicate] 5 answers

i'm a beginner in python so i'm sorry if this question is bad but i'm trying to write a simple script to calculate the distance of some points from the origin but when i went to test it with some random data i got a weird result: the x and y values got the same value from random() no matter what i did. here is as minimal an example as i could make of the issue:

from random import random

x = y = [None]*5
for i in range(5):
    x[i] = random()*10
    y[i] = random()*10
    print("x: ", x[i])
    print("y: ", y[i])

dist = []
for d in range(len(x)):
    dist.append((x[d]**2 + y[d]**2)**0.5)
    print("d: ", dist[d])

which i would expect to print 5 random values for x and 5 different random values for y and then the distance from each pair to the origin but instead it prints the same value for each x and y, like this

x:  4.0208682354265655
y:  4.0208682354265655
x:  3.923508926640271
y:  3.923508926640271
x:  6.854641339548273
y:  6.854641339548273
x:  0.5508569083735182
y:  0.5508569083735182
x:  0.312088919076029
y:  0.312088919076029
d:  5.686366391055424
d:  5.548679536146577
d:  9.693926747592448
d:  0.7790293107487427
d:  0.44136038202367955

i thought maybe it was the random module because i've heard before not to use it and to use numpy's instead but it happened with either. what is going on here?