Python program to grab a file off of Raspberry Pi

I am looking to automate file retrieval from a python program that gets a file from my Raspberry Pi and returns it to my local PC. I have tried SSH, FTP & SCP but can't get any to work and run into connection problems in my Python program. Any one have a quick code snippet. below is the code I think should work but getting an error

From PI: Raspberry PI Zero W
Receiving PC: Windows 10 running a pycharm python program

-IDE: Pycharm

NOTE: Connected to same network, ssh, putty, cmd line SCP, remote desktop work to PI but I can't do the same by just running a python program to get a file.

Filename: testfile.jpg Pi: Directory. /home/pi/testfile.jpg

Open to any method to retrieve file as long as it can do it automagically?

Ideas?

Thank you!

Code failing with Cryptography deprecation error

Code won't make simple connection - feel its on my local pC?

from paramiko import SSHClient
from scp import SCPClient

ssh = SSHClient()
ssh.Connect(ipadd.re.ss)

CAN'T GET PAST HERE ERROR BELOW

Error: CryptographyDeprecationWarning: encode_point has been deprecated on EllipticCurvePublicNumbers and will be removed in a future version. Please use EllipticCurvePublicKey.public_bytes to obtain both compressed and uncompressed point encoding. m.add_string(self.Q_C.public_numbers().encode_point())

Solution

Have you heard of Paramiko? It's an SSH client for Python.

You could do something like:

client.connect(...)
i, o, e = client.exec_command('cat /home/pi/testfile.jpg')
with open('testfile.jpg', 'wb') as f:
    for line in o:
        # these are lines in the file.
        f.write(line)