Use the sample() Function

#import the random module
import random

#The sequence to sample
my_seq = [0, 1, 2, 3, 4, 5, 6, 7, 8, 9]

#get a sample of 4 elements
print(random.sample(my_seq, 4))

The sample() function in the random module  generates a unique random sample of elements from a sequence/population. 

sample(seq, k = 5, counts = None)
seq Required. A sequence of objects like lists, tuples, strings, etc, from which to draw the samples
k Required. An integer that indicates the length of the sample to draw from the population.
counts Optional. Specifies the number of times each item in the sequence should be sampled

The function returns a list containing k random and unique elements drawn from the sequence. The original sequence remains unchanged.

Get a sample of elements from  a population of integers between 0 and 100

#import the random module
import random

data = range(100)

sample = random.sample(data, 10)

print(sample)

with a tuple

#import the random module
import random

data = (0.1, 0.4, 0.2, 0.3, 0.0, 0.5, 0.2, 0.4, 0.1)

sample = random.sample(data, 3)

print(sample)

The k argument should always be positive and smaller than the total number of elements in the original sequence. Otherwise, a ValueError will be raised.

A ValueError is raised if k is greater than the length of the original sequence

#import the random module
import random

data = [1, 2, 3]

#Raises an erro because the defaultk is greater than the length of the sequence
sample = random.sample(data, 5)

print(sample)

You should also note that sets and dictionaries are not sequences, since their elements are unordered. We should first cast such types into a sequence type such as a list or a tuple before sampling their elements. Passing non-sequence objects will result in an error being raised.

import random

data = {0, 1, 2, 3, 4, 5, 6, 7}

sample = random.sample(data, 3)

print(sample)

First cast set elements to a list before sampling them

import random

data = {0, 1, 2, 3, 4, 5, 6, 7}

#cast the set to a list
data = list(data)

sample = random.sample(data, 3)

print(sample)