how to generate a floating point random number with two precision in python

Question

I want to generate a floating point random number with two precision. For example:2.54 How to change the uniform(a,b) in python. Thanks

You are confusing `fixed point` with `floating point` you can't generate floating point numbers with a precision of 2 decimal places. (though you can print them to 2 decimal places). If you require 2 decimals places look at the `Decimal` type in the `decimal` module. — AChampion, May 25 '17 at 04:45
You can do it in a hacky way generating 3 digit random number and dividing it by 100 — Arun G, May 25 '17 at 04:47
I'm not totally sure if you want two decimals, or randmon between two values? maybe you can clarify a little — developer_hatch, May 25 '17 at 05:05
@ArunG, how would be that? Could I see if you don't mind, I didn't follow you sorry — developer_hatch, May 25 '17 at 05:06

score 15 · Accepted Answer · answered May 25 '17 at 04:47

15

You can use round function with uniform function to limit float number to two decimal places.

Example:

 round(random.uniform(1.5, 1.9),2)
 Out[]: 1.62

 round(random.uniform(1.5, 1.9),3)
 Out[]: 1.885

answered May 25 '17 at 04:47

Sayali Sonawane

Thank you! And what should I do If I want to generate it fixed whenever I run my program? – user3356423 May 25 '17 at 05:12
if you want fixed number then just apply round(any_number,2). random.uniform will generate different value every time. – Sayali Sonawane May 25 '17 at 05:37

score 4 · Answer 2 · answered May 25 '17 at 05:36

4

This could be the possible solution, As requested by @Damian

>>> from random import randint
>>> randint(100, 999)/100.00
7.32
>>> randint(100, 999)/100.00
4.69
>>> randint(100, 999)/100.00
5.36

answered May 25 '17 at 05:36

Arun G

score 2 · Answer 3 · answered May 25 '17 at 04:58

If you want to generate a random number between two numbers, with a specific amount of decimals, here is a way:

import random

greaterThan = float(1)
lessThan = float(4)
digits = int(2)

rounded_number = round(random.uniform(greaterThan, lessThan), digits)

in this case, your random number will be between 1 and 4, with two digits

3 Answers3