import random
# Writing part:
user_input = []
while True:
i = input('Enter your number. For end press enter:')
if not i:
break
else:
user_input.append(i)
f = open('user.txt', 'w')
for number in user_input:
f.write(number+'\n')
f.close()
# Reading part:
numbers = []
f = open('user.txt', 'r')
for line in f:
numbers.append(line)
f.close()
print(random.choice(numbers))
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