Python & nmap

[^Bart]

Hi guys,

i need to copy some files from a Debian client to all linux embedded 
clients.

I know the linux commands like:

# scp "my_file" root at 192.168.205.x/my_directory

But... I have to upload 100 devices, I have a lan and a dhcp server just 
for this work and I'd like to make a script by Python which can:

1) To scan the lan
2) To find which ips are "ready"
3) To send files to all of the "ready" clients
4) After I see on the display of these clients the successfully update I 
remove from the lan them and I put them to the box to send them to our 
customers.

I found https://pypi.org/project/python-nmap/ and I followed the line 
"To check the network status" but... it doesn't work.

THE INPUT
-------------------------------------------------------------------------
import nmap
nm.scan(hosts='192.168.205.0/24', arguments='-n -sP -PE -PA21,23,80,3389')
hosts_list = [(x, nm[x]['status']['state']) for x in nm.all_hosts()]
for host, status in hosts_list:
      print('{0}:{1}'.host)

THE OUTPUT
---------------------------------------------------------------------
Traceback (most recent call last):
   File "/home/gabriele/Documenti/Python/nmap.py", line 1, in <module>
     import nmap
   File "/home/gabriele/Documenti/Python/nmap.py", line 2, in <module>
     nm.scan(hosts='192.168.205.0/24', arguments='-n -sP -PE 
-PA21,23,80,3389')
NameError: name 'nm' is not defined

Regards.
^Bart