The only thing that i$\text{'}$m having an issue with now is that I can't get it to display $3$ decimal places no matter what, for example $0\mathrm{.}600$ appears as $0\mathrm{.}6$ when it outputs. This is the code:

import numpy as np

import sys

def logistic$($x$,$ r$)$:

return r $*$ x $*(1-$ x$)$

def simulate$($x$0,$ r$,$ n$\_$steps, output$\_$file$)$:

population $=$ np$.$zeros$($n$\_$steps $+1)$

population$[0]=$ x$0$

for i in range$(1,$ n$\_$steps $+1)$:

population$[$i$]=$ logistic$($population$[$i $-1],$ r$)$

population$[$i$]=$ round$($population$[$i$],3)$ # Round the population value

with open$($output$\_$file, $"$w$")$ as f:

for i in range$($n$\_$steps $+1)$:

f$.$write$($f$"\{$i$\}\backslash$t$\{$population$[$i$]\}$

$")$ # Add a newline character

if $\_\_$name$\_\_=="\_\_$main$\_\_"$:

# Check if command line arguments are provided

if len$($sys$.$argv$)!=5$:

print$("$Usage: python script.py x$0$ r n$\_$steps output$\_$file"$)$

sys$.$exit$(1)$

# Parse command line arguments

x$0=$ float$($sys$.$argv$[1])$

r $=$ float$($sys$.$argv$[2])$

n$\_$steps $=$ int$($sys$.$argv$[3])$

output$\_$file $=$ sys$.$argv$[4]$

simulate$($x$0,$ r$,$ n$\_$steps, output$\_$file$)$

Everything works great other than this one thing, and I$\text{'}$m not very sure on how to fix it$.$