students $=[]$

studentCount $=0$

def addStudent$()$:

student$\_$id $=$ input$("$Enter student ID: $")$

name $=$ input$("$Enter student name: $")$

age $=$ input$("$Enter student age: $")$

gpa $=$ input$("$Enter student GPA: $")$

newstudent $=\{$

$"$id$"$: student$\_$id$,$

"name": name,

"age": age,

"gpa": gpa

$\}$

students.append$(\text{'}$newstudent$\text{'})$

studentCount $+=1$

def displayStudents$()$:

if not students:

print$("$No students to display."$)$

else:

for student in students:

print$($f$"$ID: $\{$student$[\text{'}$id$\text{'}]\},$ Name: $\{$student$[\text{'}$name$\text{'}]\},$ Age: $\{$student$[\text{'}$age$\text{'}]\},$ GPA: $\{$student$[\text{'}$gpa$\text{'}]\}")$

I am still getting this error code

print$($f$"$ID: $\{$student$[\text{'}$id$\text{'}]\},$ Name: $\{$student$[\text{'}$name$\text{'}]\},$ Age: $\{$student$[\text{'}$age$\text{'}]\},$ GPA: $\{$student$[\text{'}$gpa$\text{'}]\}")$

TypeError: string indices must be integers, not $\text{'}$str$\text{'}$