Paramiko SFTP Hello World

paramiko_hello_world.py

import paramiko

def get(host, user, passw, remote_path, local_path, public_host_key_filepath=None):
    with paramiko.SSHClient() as ssh:
        if public_host_key_filepath:
            # secure
            ssh.load_host_keys(public_host_key_filepath)
            ssh.set_missing_host_key_policy(paramiko.RejectPolicy())
        else:
            # not secure
            ssh.set_missing_host_key_policy(paramiko.WarningPolicy())
        # if False:
            # especially insecure. Just don't.
            # ssh.set_missing_host_key_policy(paramiko.AutoAddPolicy())

        try:
            # Please note that opening a new connection for every `get` operation is 
            # inefficient and creates unnecessary network traffic. To improve this, 
            # leave the connection open while performing all needed operations
            ssh.connect(host, username=user, password=passw)
            with ssh.open_sftp() as sftp:
                sftp.get(remote_path, local_path)
        finally:
            ssh.close()

if __name__ == "__main__":
    get("fake.host.url", "fake_user", "12345", "remote_path", "local_path")