This version includes secure GradeTracker.py

Author: dominict

1 gradetracker/GradeTracker_more_secure.py

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+'''
+This is a grade tracking program - think through the goal up front- what is the task and design?
+needs to enable several basic functions for faculty members.
+This comment in triple quotes is called a docstring.
+It is text that explains what a code file (aka module) or function does.
+See https://www.geeksforgeeks.org/python-docstrings/
+This version saves the login and password in a separate file.
+You can learn more about how to handle secrets like passwords here:
+https://blog.gitguardian.com/how-to-handle-secrets-in-python/ 
+'''
+#import libraries (aka module) first
+import statistics as s
+from dotenv import load_dotenv
+import os
+
+#Now we can load the login and password from the .env file. They are no longer exposed in the code.
+load_dotenv()
+admins = os.getenv("admins")
+students = os.getenv("students")
+
+
+# Now we define functions. Functions encapsulate logic into reusable recipes that can be
+# executed whenever we need them by calling their name with parentheses.
+def enter_grades():
+    '''
+    Function to input a grade for a given student.
+    '''
+    name_to_enter = input('Student name: ')
+    grade_to_enter = input('Grade: ')
+    # This checks through the keys of the students dictionary to see if the name entered
+    # exactly matches any one in there.
+    if name_to_enter in students:
+        print('Adding grade for'+name_to_enter)
+        students[name_to_enter].append(float(grade_to_enter)) #float will have a .0
+        print(str(name_to_enter)+' now has these grades:')
+        print(students[name_to_enter])
+    else:
+        print('Student not found. Please check your spelling or go back and add if new.')
+
+def remove_student():
+    '''
+    Function to remove a specific student.
+    '''
+    name_to_remove = input('Who do you want to remove? ')
+    if name_to_remove in students:
+        print('Removing '+name_to_remove)
+        del students[name_to_remove]
+        print(students)
+    else:
+        print('Student not found.')
+
+def average_students():
+    '''
+    Function to average all students' grades.
+    '''
+    for student in students:
+        grades = students[student]
+        average = s.mean(grades) #notice the s? we imported the statistics module as s.
+        #Thus, we are using a fucntion called "mean()" from the statistics module.
+        print(student,' average ',average)
+
+def main():
+    '''
+    Function to show user main menu and process option selections.
+    '''
+    print("User: " + login)
+    # Here we present our main menu options once a person logs in successfully.
+    print("""
+    Welcome to the Grade Tracker
+
+    [1] - Enter Grades
+    [2] - Remove Student
+    [3] - Student Averages
+    [4] - Exit
+    """)
+
+    action = input('What would you like to do? (Enter a number) ')
+    #Here we process their choice of what they want to do.
+    if action == '1':
+        #print('1 selected')
+        enter_grades()
+    elif action == '2':
+        #print('2 selected')
+        remove_student()
+    elif action == '3':
+        #print('3 selected')
+        average_students()
+    elif action == '4':
+        #print('4 selected')
+        exit()
+    else:
+        print('Valid option not selected.') #need to cause it to reprompt
+
+login = input('Faculty account name: ')
+
+if login in admins:
+    password = input('Password: ')
+    if admins[login] == password:
+        print('Welcome,',login)
+        #now run the code
+        while True:
+            main()
+    else:
+        print('Invalid password.')
+else:
+    print('Invalid user.')