How to use random.randint() to select random names given in a list in python.
I want to print 5 names from that list. Actually i know how to use random.randint() for numbers. but i don't know how to select random names from a given list.
we are not allowed to use random.choice.
help me please
This will not guarantee no repeats, since random.choice is better for that.
import random
names = ["A", "B", "C", "D", "E", "F", "G", "H", "I"]
print([names[random.randint(0, len(names)-1)] for i in range(5)])
>>> population = range(10)
Are you allowed to use random.sample?
>>> names = random.sample(population, 5)
>>> names
[4, 0, 1, 2, 8]
Using solely random.randint would be more difficult, but if you must do so, I'd do something like this:
>>> names = [population[random.randint(0, len(population)-1)] for x in range(5)]
>>> names
[2, 8, 6, 6, 9]
But obviously this is with replacement. If you don't want replacement, you'd need some more complicated code. For example, a function:
def custom_sample(population, count):
names = []
already_used = []
for x in range(count):
temp_index = random.randint(0, len(population)-1)
while temp_index in already_used:
temp_index = random.randint(0, len(population)-1)
names.append(population[temp_index])
already_used.append(temp_index)
return names
So:
>>> names = custom_sample(population, 5)
>>> names
[7, 4, 8, 3, 0]
The simplest way to select a random item from the list is to use using random.randint() as below,
Say for instance your list is:
list_1 = ['cat', 'amusement park', 'bird watching']
and you want to print an item from the list randomly then,
import random
print(list_1[random.randint(0,2)])
If you want to get a random element from a list using random.randint(), below is an option
list_name = [...] # a sample list
size = len(list_name) # finding the length of the list
random_elemet = list_name[random.randint(0,size)] # get a random element
Yes, for repeat sample from one population, @MaxLascombe's answer is OK. If you do not want tiles in samples, you should kick the chosen one out. Then use @MaxLascombe's answer on the rest of the list.
