[Python] conditional statement is not working when function returns "None" in Python

import pandas as pd
import ipaddress


def get_destination_host_from_csv():

df = pd.read_csv('dc_interface.csv')
for i in df['destination']:
if ipaddress.ip_network(ip_add2,strict=False).subnet_of(ipaddress.ip_network(i,strict=False)) is True:
target_value = i
break
else:
target_value = None

if target_value is not None:
index_list = []
column_list = []
for column in df.columns:
for index in df.index:
if df.loc[index, column] == target_value:
index_list.append(index)
column_list.append(column)
df.iloc[index_list[0]]['hostname']
return df.iloc[index_list[0]]['hostname'],df.iloc[index_list[0]]['virtual-router']
else:
return None

def component_to_dest_fw():
if get_destination_host_from_csv() is None:
dest_fw = firewall.Firewall(get_destination_host_from_csv()[0],api_username= username, api_password= password)
source_route_xml = dest_fw.op(f'test routing fib-lookup virtual-router "trust-vr" ip "{ip_add2}"', xml=True)
source_interface = ET.fromstring(source_route_xml)
source_interface_finder = source_interface.findall(".//result/interface")[0].text
return source_interface_finder
else:
print("no need to check destination side firewall")


my first function get_destination_host_from_csv() is returning None when I run the function, but when I match the condition of the first function with returned value of 2nd function component_to_dest_fw() and try to print it then it gets me below output:

<function component_to_dest_fw at 0x7ff10c061bc0>
​

instead of :

no need to check destination side firewall
​

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