class EmailNotValidError$()$:

$"""$ Raised when the target email is not valid $"""$

def is$\_$email$\_$valid$($mailing$\_$list$)$:

for key, email in mailing$\_$list.items$()$: # Loop through the mailing list:

if $\text{'}$@$\text{'}$ not in email: # Check if the email contains an @:

raise # Raise an EmailNotValidError exception if the @ is not present

def is$\_$email$\_$valid$\_$extended$($mailing$\_$list$)$:

final$\_$users$\_$list $=[]$ # Array to hold user ids

# Inserted a try.., except.. block to cast the exception

try:

# Loop through the mailing list

for key, email in mailing$\_$list.items$()$: # Your mailing list:

if $\text{'}$@$\text{'}$ in email: # Check if the @ is present in the email:

# Append the id of users with valid emails

else:

raise # Raises an EmailNotValidError otherwise

except # Your user$-$defined exception:

return # Return a user$-$friendly message to cast the exception

def is$\_$email$\_$valid$\_$extended$\_$finally$($mailing$\_$list$)$:

final$\_$users$\_$list.append$($key$)=$ # Array to hold user ids

# Inserted a try.., except.. block to cast the exception

try:

# Loop through the mailing list

for key, email in # Your mailing list:

if $\text{'}$@$\text{'}$ in # Check if the @ is present in the email:

# Append the id of users with valid emails

else:

raise # Raises an EmailNotValidError otherwise

except # Your user$-$defined exception:

# Print a user$-$friendly message to cast the exception

finally:

return # Return the id of the users with valid email

How do you fix this code?