Is there a way to scan an entire network range (192.168.0./24) in python and have the data outputted to a text file?

I'm relatively new to python so I don't have the most knowledge. I'm using python-nmap to scan the network range but the problem I'm struggling with most is outputting the results to a text file. This is what I have so far

import nmap


ip = '192.168.20.1'
port = 80
nmap = nmap.PortScanner()
result = nmap.scan(ip, str(port))
port_status = (result['scan'][ip]['tcp'][port]['state'])
print(f"Port {port} is {port_status} on {ip}")
with open('nmap.txt','w') as file:
    file.write(f"Port {port} is {port_status} on {ip}")

while this works for only a singular ip, im trying to scan for an entire network range, such as 192.168.20.0/24. When I set to the ip variable to '192.168.20.0/24' I get the following error code:

    Traceback (most recent call last):
  File "c:/Users/john/Desktop/Python/Test.py", line 8, in <module>
    port_status = (result['scan'][ip]['tcp'][port]['state'])
KeyError: '192.168.20.0/24'

I feel like there is a very simple fix to this and part of me feels idiotic for posting this but help would be very much appreciated. Thank you

Solution

With CIDR notation you will get multiple results, while your lines 8-11 can only handle a single result. You need a loop to handle your python-nmap results.

import nmap
ips = '192.168.20.0/24'
port = 80
nmap = nmap.PortScanner()
nmap.scan(ips, port)

with open('nmap.txt','w') as file:
    for host in nmap.all_hosts():
        port_state = nmap[host]['tcp'][port]['state']
        print(f"Port {port} is {port_state} on {host}")
        file.write(f"Port {port} is {port_state} on {host}")