After countless attempts to solve my issue and using chegg, I can not figure out why my code is not connecting my trunk lines correctly. I will send the inputs, but my code is suppose to use recursion somewhere within my code but even with it$,$ i am still not getting the desired result. whenever i switch$-$connect $2$ phone numbers and start$-$call between them, it's suppose to say that the numbers are connected, but it's not. Could someone please help me fix my issue?

code:

import json

HYPHEN $="-"$

QUIT $=$ 'quit'

SWITCH$\_$CONNECT $=$ 'switch$-$connect'

SWITCH$\_$ADD $=$ 'switch$-$add'

PHONE$\_$ADD $=$ 'phone$-$add'

NETWORK$\_$SAVE $=$ 'network$-$save'

NETWORK$\_$LOAD $=$ 'network$-$load'

START$\_$CALL $=$ 'start$-$call'

END$\_$CALL $=$ 'end$-$call'

DISPLAY $=$ 'display'

def connect$\_$switchboards$($switchboards$,$ area$\_1,$ area$\_2)$:

if area$\_1$ not in switchboards:

switchboards$[$area$\_1]=\{\}$

if area$\_2$ not in switchboards:

switchboards$[$area$\_2]=\{\}$

switchboards$[$area$\_1][$area$\_2]=[]$

switchboards$[$area$\_2][$area$\_1]=[]$

def add$\_$switchboard$($switchboards$,$ area$\_$code$)$:

# Add a new switchboard to the network

switchboards$[$area$\_$code$]=\{\}$

def add$\_$phone$($switchboards$,$ area$\_$code, phone$\_$number$)$:

# Add a new phone to the network

if area$\_$code not in switchboards:

switchboards$[$area$\_$code$]=\{\}$

switchboards$[$area$\_$code$][$phone$\_$number$]=[]$

def save$\_$network$($switchboards$,$ file$\_$name$)$:

# Save the network to a file

with open$($file$\_$name, $\text{'}$w$\text{'})$ as f:

json.dump$($switchboards$,$ f$)$

def load$\_$network$($file$\_$name$)$:

# Load the network from a file

with open$($file$\_$name, $\text{'}$r$\text{'})$ as f:

switchboards $=$ json.load$($f$)$

return switchboards

def start$\_$call$($switchboards$,$ start$\_$area, start$\_$number, end$\_$area, end$\_$number$)$:

# Start a call between two phones

if start$\_$area not in switchboards or end$\_$area not in switchboards:

print$(\text{'}$Invalid area code.$\text{'})$

return

start$\_$phone $=$ str$($start$\_$number$)$

end$\_$phone $=$ str$($end$\_$number$)$

if start$\_$area $==$ end$\_$area:

# Local call

switchboards$[$start$\_$area$].$setdefault$($start$\_$phone, $[]).$append$($end$\_$phone$)$

print$($f$\text{'}\{$start$\_$area$\}-\{$start$\_$phone$\}$ and $\{$end$\_$area$\}-\{$end$\_$phone$\}$ are now connected.$\text{'})$

elif switchboards$[$start$\_$area$].$get$($end$\_$area$)$ or switchboards$[$end$\_$area$].$get$($start$\_$area$)$:

# Long$-$distance call

if end$\_$area not in switchboards$[$start$\_$area$]$:

print$($f$\text{'}$Connecting switchboards $\{$start$\_$area$\}$ and $\{$end$\_$area$\}.\text{'})$

connect$\_$switchboards$($switchboards$,$ start$\_$area, end$\_$area$)$

switchboards$[$start$\_$area$][$start$\_$phone$].$append$($end$\_$phone$)$

print$($f$\text{'}\{$start$\_$area$\}-\{$start$\_$phone$\}$ and $\{$end$\_$area$\}-\{$end$\_$phone$\}$ are now connected.$\text{'})$

else:

print$($f$\text{'}$Cannot connect phone $\{$start$\_$area$\}-\{$start$\_$phone$\}$ to phone $\{$end$\_$area$\}-\{$end$\_$phone$\}.\text{'})$

def end$\_$call$($switchboards$,$ start$\_$area, start$\_$number$)$:

# End a call between two phones

if len$($switchboards$[$start$\_$area$][$start$\_$number$])>0$:

switchboards$[$start$\_$area$][$start$\_$number$].$pop$()$

else:

print$($f$\text{'}$No call in progress for phone $\{$start$\_$number$\}.\text{'})$

def display$\_$switchboard$($switchboards$,$ switchboard$)$:

print$(\text{'}$Switchboard with area code: $\text{'}+$ str$($switchboard$))$

print$(\text{'}$ Trunk lines are:$\text{'})$

for connected$\_$area in switchboards$[$switchboard$]$:

print$(\text{'}$ Trunk line connection to: $\text{'}+$ str$($connected$\_$area$))$

print$(\text{'}$ Local phone numbers are:$\text{'})$

for phone$\_$number, connections in switchboards$[$switchboard$].$items$()$:

if not connections:

print$(\text{'}$ Phone with number: $\text{'}+$ str$($phone$\_$number$)+\text{'}$ is not in use.$\text{'})$

else:

for connection in connections:

print$(\text{'}$ Phone with number: $\text{'}+$ str$($connection$)+\text{'}$ is in use.$\text{'})$

def display$($switchboards$)$:

# Display the network

for switchboard in switchboards:

display$\_$switchboard$($switchboards$,$ switchboard$)$

inputs:

switch$-$add $443$

switch$-$add $410$

switch$-$add $656$

display

switch$-$connect $443410$

phone$-$add $656-112-3412$

phone$-$add $443-132-1332$

display

start$-$call $656-112-3412443-132-1332$

switch$-$connect $656410$

start$-$call $656-112-3412443-132-1332$

$($main function will be sent as picture$)$

The issue is after using start$-$call the first time, it's suppose to say that the phone lines are not connected, but using switch$-$connect is suppose to connect these numbers together to allow them to call, but within my code the issue is that it's not saying that it's connected.