Creating random numbers in a list-CodePudding

Dear respected coders,

I have a question regarding my code which is not working. Actually, I want to generate random numbers which should be presented in a list, whenever I call the function. Could someone please help me clarifying what goes wrong here and how to continue? I am a bit confused right now.

This is the error message I got:

TypeError: RandomNumbers() missing 1 required positional` argument: 'Number'

I understand, but I do not want to enter a number, it should output me a random list consisting of 7 elements with elements varying between 0 and 9. For example: [2,3,5,0,2,0,9)

import random
Number = []

def RandomNumbers(Number):
    for i in range(0,7):
        x = Number.randint(0,9)
        Number.append(x)
        print(Number)

RandomNumbers()

CodePudding user response：

Considering you've mentioned that you do not want to input any numbers, change your Python function declaration to not take in any arguments - Number in this case - as it currently expects one.

You also need to replace x = Number.randint(0,9) with x = random.randint(0,9) as randint is a method belonging to random.

This should do what you want:

import random
Number = []

def RandomNumbers():
    for i in range(0,7):
        x = random.randint(0,9)
        Number.append(x)
    print(Number)

RandomNumbers()

Output:

[1, 7, 6, 5, 5, 7, 5]

There's also a smaller, cleaner solution, which achieves the same output as above using list comprehensions:

import random
Number = [random.randint(0,9) for _ in range(7)]

print(Number)

CodePudding user response：

just replace the last line of code

RandomNumbers()

with

RandomNumbers(ANYNUMBER)

CodePudding user response：

You can't call a function that receives object without it. so you could do this:

import random
Number = []

def RandomNumbers():
    for i in range(0,7):
        x = random.randint(0,9)
        Number.append(x)
    return Number

print(RandomNumbers())

CodePudding user response：

You have to change Number.randint to random.randint. The corrected code looks like that:

import random
Number = []

def RandomNumbers(Number):
    for i in range(0,7):
        x = random.randint(0,9)
        Number.append(x)
        print(Number)

RandomNumbers(Number)

Output:

[9]
[9, 1]
[9, 1, 5]
[9, 1, 5, 8]
[9, 1, 5, 8, 3]
[9, 1, 5, 8, 3, 9]
[9, 1, 5, 8, 3, 9, 2]

But this code is not cleaned up at all. You can instead learn about the module numpy which has great functions including creating arrays with random integers!

CodePudding user response：

import random
def RandomNumbers():
    arr = []
    for i in range(0,7):
        x = random.randint(0,9)
        arr.append(x)
    return(arr)

Number = RandomNumbers()
print(Number)

Use random.randint(0,9) instead of Number.randint(0,9)
You probably want to use this function more than once so it is advisable to declare an array inside the function.