How to copy file to USB Mounted on Pi from SSH Server

Question

I am writing a python script that checks the files in a folder on my Android, and will copy .jpg files to a USB I have mounted on my RPi. (My Android is running as an SSH server).

I am able to connect to my Android and get a list of filenames. I'm stuck as to how to copy the file from the Android 'server' to my USB Drive on the Pi. (Again, via Python script).

Here's what I have so far:

import paramiko as pmko
import os
import shutil
import subprocess


def list_files(directory, filetype, ssh):
    """
    This will scan a directory for the filetype,
    which is passed as `.jpg`, or `.mp3`, etc. and return
    a list of those files.
    """
    print("listing all photos in file.")
    distantFiles = list()
    filePath = '/storage/emulated/0/' + directory
    filePattern = '"*' + filetype + '"'
    rawcommand = 'find {path} -name {pattern}'
    command = rawcommand.format(path=filePath, pattern=filePattern)

    stdin, stdout, stderr = ssh.exec_command(command)
    filelist = stdout.read().splitlines()
    for afile in filelist:
        (head, filename) = os.path.split(afile)
        distantFiles.append(filename)
    return distantFiles

def connect_to_phone():
    host = "192.168.0.105"
    port = 2222
    username = "logintest"
    password = "supersecretpassword"

    print("Starting connection")
    ssh = pmko.SSHClient()
    ssh.set_missing_host_key_policy(pmko.AutoAddPolicy())
    ssh.connect(host, port=port, username=username,
                password=password)
    sftp = ssh.open_sftp()
    print("Connected!")
    return sftp, ssh


def main():
    sftp, ssh = connect_to_phone()
    files = list_files("DCIM/camera", ".jpg", ssh)
    directory = '/storage/emulated/0/' + 'DCIM/camera/'
    for file in files:
        _file = file.decode('utf-8')
        print(_file)
        #shutil.copy2(directory + _file, '/media/pi/usb/')
        sftp.put(directory+_file, '/media/pi/usb')  #no such file or directory '/storage/emulated/0/DCIM/camera/[whatever].jpg 
        quit()


if __name__ == "__main__":
    main()

So when I run this, I expected the sftp.put() to put the file in the /media/pi/usb folder (see this Answer), which does exist on the Pi (I followed #3 on this site to set up the USB, but named it USB, not USB1 and I can't rename due to permissions error...) - see screenshot of RPI's directories here.

However, I get this error when I run the program:

FileNotFoundError: [Errno 2] No such file or directory: '/storage/emulated/0/DCIM/camera/[jpeg name].jpg'

I think that's because it's looking for that directory on the RPi, not the SSH Server. How would I link that folder to the SSH Server, or otherwise copy the file from the SSH Server to the RPi's USB?

_{(I'm not sure if this is better here on RPi.SE or should be on StackExchange. Please migrate if preferable.)}

Answer 1

Per the comments, I just needed to use the sftp.get method, not .put.