Python random number generator using randint, randrange, random and uniform

Generating random integer between a range , 1(inclusive ) and 10 ( inclusive )

import random
print(random.randint(1, 10))

Output

Displaying 10 random integers between 0 and 10

import random

for x in range(10):
  print(random.randint(0, 10), ', ', end='')

Output

4 , 0 , 3 , 10 , 2 , 6 , 7 , 3 , 4 , 7 ,

randrange

Random number between a range. ( start , stop [,step])

from random import randrange
print(randrange(10))  # From 0 to 9

Output

without repeating numbers

Without duplicate numbers we can generate from 1 to 100 ( 10 numbers selected )

print(random.sample(range(1, 100), 10))

Random float

We can generate float between 0 and less than 1 ( exclusive )

import random
print(random.random())  # between 0 and less than 1

Output

0.6919994035378282

uniform

Random float between a range of numbers

random.uniform(1.2, 2.3)  # start and stop, both inclusive

Output

1.7852514538737663

We used random.random() and random.uniform for generating random float numbers. The main difference between them are here.

random.uniform takes two parameters start and stop to return number within the range. random.random() takes no parameter and returns between 0.0 and 1. (It will return less than 1. )

random.uniform() returns between start and stop ( inclusive )

Example

Use one function to generate marks for a class. Input to the function will be the number of students in the class. A student can secure marks between 0 and 100.

def gen_marks(student_no):
    my_list = []
    for i in range(student_no):
        my_list.append(random.randint(0, 101))
    return my_list
class_4 = gen_marks(28)  # Marks of class 4 for 28 students

random string

Length of 6 chars , all lowercase. Change the char to Uppercase by using ascii_uppercase

import string
def id_generator(size=6, chars=string.ascii_lowercase):
    return ''.join(random.choice(chars) for _ in range(size))
str1 = id_generator()

random string with number

import string
import random
def id_generator(size=6):  # default size is 6
    chars = string.ascii_lowercase + string.digits
    return ''.join(random.choice(chars) for _ in range(size))
str1 = id_generator(4)

Random element from a list

l1 = ['cheking', 'cleaning', 'inspection', 'repair', 'painting']
import random
activity = random.choice(l1)
print(activity)

Create a list of random elements by using a list

We will get a list ( activity ) of 10 elements by randomly selecting from a 5 elements list.

import random
l1 = ['cheking', 'cleaning', 'inspection', 'repair', 'painting']
activity = [random.choice(l1) for i in range(10)]
print(activity)

Housie game using Random Number Generator

list math functions Python- Tutorials

Subhendu Mohapatra

Author & Instructor at plus2net

I write and maintain practical tutorials on Python, PHP, SQL, JavaScript, HTML, jQuery, and web development at plus2net. The tutorials focus on clear explanations, working examples, and code that readers can test and adapt while learning.

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