Produces a student report from data extracted from an external source using Python

1 # Produces a student report from data extracted from an external source.
2 from studentfile import StudentFileReader
3
4 # Name of the file to open.
5 FILE_NAME = "students.txt"
6
7 def main():
8 # Extract the student records from the given text file.
9 reader = StudentFileReader( FILE_NAME )
10 reader.open()
11 studentList = reader.fetchAll()
12 reader.close()
13
14 # Sort the list by id number. Each object is passed to the lambda
15 # expression which returns the idNum field of the object.
16 studentList.sort( key = lambda rec: rec.idNum )
17
18 # Print the student report.
19 printReport( studentList )
20
21 # Prints the student report.
22 def printReport( theList ):
23 # The class names associated with the class codes.
24 classNames = ( None, "Freshman", "Sophomore", "Junior", "Senior" )
25
26 # Print the header.
27 print( "LIST OF STUDENTS".center(50) )
28 print( "" )
29 print( "%-5s %-25s %-10s %-4s" % ('ID', 'NAME', 'CLASS', 'GPA' ) )
30 print( "%5s %25s %10s %4s" % ('-' * 5, '-' * 25, '-' * 10, '-' * 4))
31 # Print the body.
32 for record in theList :
33 print( "%5d %-25s %-10s %4.2f" % \
34 (record.idNum, \
35 record.lastName + ', ' + record.firstName,
36 classNames[record.classCode], record.gpa) )
37 # Add a footer.
38 print( "-" * 50 )
39 print( "Number of students:", len(theList) )
40
41 # Executes the main routine.
42 main()