class StudentInfoError$($Exception$)$:

$"""$Custom exception for student information errors."""

def $\_\_$init$\_\_($self$,$ message$)$:

self.message $=$ message

super$().\_\_$init$\_\_($self$.$message$)$

def find$\_$ID$($name$,$ student$\_$dict$)$:

$"""$Find the student ID by name."""

if name in student$\_$dict:

return student$\_$dict$[$name$]$

else:

raise StudentInfoError$($f$"$Student ID not found for $\{$name$\}")$

def find$\_$name$($student$\_$id$,$ student$\_$dict$)$:

$"""$Find the student name by ID$."""$

for name, id in student$\_$dict.items$()$:

if id $==$ student$\_$id:

return name

raise StudentInfoError$($f$"$Student name not found for $\{$student$\_$id$\}")$

def main$()$:

student$\_$dict $=\{$

'Reagan': 'rebradshaw$835\text{'},$

'Ryley': 'rbarber$894\text{'},$

'Peyton': 'pstott$885\text{'},$

'Tyrese': 'tmayo$945\text{'},$

'Caius': 'ccharlton$329\text{'}$

$\}$

try:

user$\_$choice $=$ int$($input$("$Enter $0$ to find ID by name or $1$ to find name by ID: $"))$

user$\_$input $=$ input$("$Enter the student name or ID: $")$

if user$\_$choice $==0$:

# Find ID by name

result $=$ find$\_$ID$($user$\_$input, student$\_$dict$)$

print$($result$)$

elif user$\_$choice $==1$:

# Find name by ID

result $=$ find$\_$name$($user$\_$input, student$\_$dict$)$

print$($result$)$

else:

print$("$Invalid choice. Please enter $0$ or $1.")$

except StudentInfoError as e:

print$($e$.$message$)$

except ValueError:

print$("$Invalid input. Please enter a valid integer for user choice."$)$

if $\_\_$name$\_\_=="\_\_$main$\_\_"$:

main$()$