pyStudentDatabaseCreateAndList

# Example of a student "database" using nested dictionary
# Each student's data includes age, grade, and decision, and may contain multiple comments (or no comments)

students = {}
name = ""
heading = ""

fin = open("StudentData.txt")

for line in fin:
    lista = line.split(":")
    if len(lista) == 2:                 # Line has 2 sections, data heading and data value
        heading = lista[0]
        value = lista[1].strip()        # Everything after ":" stripped of white space
        if heading == "Student":
            name = value
            students[name] = {}         # Create empty sub-dictionary for this student
        elif heading == "Comments":
            students[name][heading] = [value]       # Create list containing first comment line
        else:
            students[name][heading] = value
    elif heading == "Comments":           # continuation of comments section
        students[name][heading].append(line.strip())      # append new comment to list in dict

# print(students)       # optional print for testing purposes
# print()

# Print data for all students
for name in students:
    age = students[name]["Age"]
    grade = students[name]["Grade"]
    decision = students[name]["Decision"]
    comment_list = []           # set default empty comments list

    print(f"Name: {name:<12}  Age: {age:<6} Grade: {grade}")
    if "Comments" in students[name]:
        print("Comments:")
        comment_list = students[name]["Comments"]
    for comment in comment_list:
        print("   ", comment)
    print(f"Decision: {decision}\n")


# OUTPUT:-
# Name: David         Age: 21     Grade: 98
# Comments:
#     Good behaviour.
#     Participated fully in music class.
# Decision: Pass
#
# Name: Matilda       Age: 29     Grade: 100
# Comments:
#     Good behaviour.
#     Helped friend with math problems.
#     Will place in advanced math.
# Decision: Pass
#
# Name: Rupert        Age: 19     Grade: 72
# Comments:
#     Lacking in concentration
# Decision: Fail
#
# Name: George        Age: 20     Grade: 67
# Decision: Fail