what is the difference between unspecified and random python code example

Example 1: python random

from random import randint # Import randint from random
print(randint(1,20)) # Gets random number from first parameter to the second

Example 2: random.uniform python

#In contrast to randInt .random.uniform generates a floating number between two variables
# imports random
import random
# randint generates a random integar between the first parameter and the second
print(random.randint(1, 100))