6.2.6 Example: Dictionary of Student Grades

  • Script with a dictionary that represents an instructor’s grade book.
  • Maps each student’s name (a string) to a list of integers containing that student’s grades on three exams. 
# fig06_01.py
"""Using a dictionary to represent an instructor's grade book."""
grade_book = {            
    'Susan': [92, 85, 100], 
    'Eduardo': [83, 95, 79],
    'Azizi': [91, 89, 82],  
    'Pantipa': [97, 91, 92] 
}

all_grades_total = 0
all_grades_count = 0

for name, grades in grade_book.items():
    total = sum(grades)
    print(f'Average for {name} is {total/len(grades):.2f}')
    all_grades_total += total
    all_grades_count += len(grades)

print(f"Class's average is: {all_grades_total / all_grades_count:.2f}")

Average for Susan is 92.33
Average for Eduardo is 85.67
Average for Azizi is 87.33
Average for Pantipa is 93.33
Class's average is: 89.67
In [66]:
run fig06_01.py

Average for Susan is 92.33
Average for Eduardo is 85.67
Average for Azizi is 87.33
Average for Pantipa is 93.33
Class's average is: 89.67

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