cannot insert variables {r1}, {r2}, {r3}

[deanhystad]

You are confusing .format with f'. This is your example with corrections,

num1=111
num2=222
num3=333
text1 = "numbers: {0},{1},{2}"
print(text1.format(num1,num2,num3))

The numbers in "numbers: {0},{1},{2}" are index numbers and tell the formatter which argument to print where. This will print the numbers in the opposite order.

num1=111
num2=222
num3=333
text1 = "numbers: {2},{1},{0}"
print(text1.format(num1,num2,num3))

Output:
numbers: 333,222,111

The code below uses the newest way to format strings, f-Strings.

import random
r1 =(random.randrange(0, 3))
r2 =(random.randrange(3, 6))
r3 =(random.randrange(6, 9))
print(f'numbers: {r1},{r2},{r3}')

When using f-Strings the brackets contain the thing you want to print instead of an index that is used to get the value from the format() function.