AttributeError: 'str' object has no attribute 'public_blob'

Question

I'd like to get a file onto my raspberry pi from my google cloud compute engine, but I get the following error:

  File "/usr/local/lib/python2.7/dist-packages/paramiko/auth_handler.py", line 212, in wait_for_response
raise e
AttributeError: 'str' object has no attribute 'public_blob'

What does this error message mean?

Thanks in advance!

python file:

import paramiko

hostname = '43.123.231.212'
password = 'passw'
username = 'dosop'
port = 22

gc_path='/home/do//assets/locations.txt'
remotepath='/home/pi/ada.txt'

t = paramiko.Transport((hostname, 22))
t.connect(username=username, password=password, pkey="/home/pi/dos/priv_key"
sftp = paramiko.SFTPClient.from_transport(t)
sftp.get(gc_path, remotepath)

Answer 1

The parameter pkey, much like hostkey, expects a value of type PKey. But you seem to be providing a string to it. You can get a PKey object out of your private key file by creating an object from paramiko.RSAKey. The following should help:

import paramiko

hostname = '43.123.231.212'
password = 'passw'
username = 'dosop'
port = 22

gc_path='/home/do//assets/locations.txt'
remotepath='/home/pi/ada.txt'
pk = paramiko.RSAKey.from_private_key(open('/home/pi/dos/priv_key'))
t = paramiko.Transport((hostname, 22))
t.connect(username=username, password=password, pkey=pk)
sftp = paramiko.SFTPClient.from_transport(t)
sftp.get(gc_path, remotepath)

Please note that this assumes you're working with rsa keys; hence the use of paramiko.RSAKey.

Also, please keep in mind that if your private key file has a password, you will need to provide the password as a second argument to the function paramiko.RSAKey.from_private_key, like the following:

pk = paramiko.RSAKey.from_private_key(open('/home/pi/dos/priv_key'), 'password')

I hope this helps.