[Python] How to read multi-line output from subprocess?

I'm trying to use subprocess to run commands via Python and capture the output. The terminal needs to be persistent, that is if I run one command the second should run in the same terminal. For example if I run "cd Desktop" and then "dir" it should execute "dir" in Desktop, and not the default path. The problem is that I can't figure out how to capture the output of commands like "dir" that have multi-line outputs. Here's my code:

import subprocess

cmd_process = subprocess.Popen(
"cmd.exe",
stdin=subprocess.PIPE,
stdout=subprocess.PIPE,
stderr=subprocess.PIPE,
text=True,
universal_newlines=True,
creationflags=subprocess.CREATE_NO_WINDOW # Hides the window
)

def send_command(command):
cmd_process.stdin.write(command + "\n")
cmd_process.stdin.flush()

def read_output():
output = cmd_process.stdout.readline()

return output

send_command("dir")
print(read_output())


When running this code, I want it to output the entirety of the commands output (in this case a list of files and folders within the current directory). However instead it only outputs the first line of the output (in this case "Microsoft Windows [Version 10.0.22631.4974]").

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