def _read_instructors(self, path: str):
"""read each line from instructors file and create instance of class instructor
and if the file not found or any value error, it raises an exception"""
try:
for cwid, name, dept in file_reader(path, 3, sep='\t',
header=True):
if cwid not in self._instructors:
self._instructors[cwid] = Instructor(cwid, name, dept)
else:
print(f" Duplicate instructor {cwid}")
except (FileNotFoundError, ValueError) as e:
print(e)
def _read_students(self, path: str) -> None:
""" read each line from student file and create instance of class student
and if the file not found or any value error, it raises an exception """
try:
for cwid, name, major in file_reader(path,
3,
sep='\t',
header=True):
if cwid not in self._students:
self._students[cwid] = Student(cwid, name, major)
else:
print(f" Duplicate student {cwid}")
except (FileNotFoundError, ValueError) as e:
print(e)
def test_file_reading_gen(self):
""" Test cases for file reading with header and seperated by | """
self.assertEqual([
a for a in file_reader(
"/Users/anerishah/Desktop/SSW810/WEEK 8/file.txt", 3, "|",
True)
], [("123", "Jin He", "Computer Science"),
("234", "Nanda Koka", "Software Engineering"),
("345", "Benji Cai", "Software Engineering")])
self.assertEqual([
a for a in file_reader(
"/Users/anerishah/Desktop/SSW810/WEEK 8/file.txt", 3, "|",
False)
], [("CWID", "Name", "Major"), ("123", "Jin He", "Computer Science"),
("234", "Nanda Koka", "Software Engineering"),
("345", "Benji Cai", "Software Engineering")])
self.assertEqual([a for a in file_reader("", 3, "|", False)], [])
self.assertNotEqual([
a for a in file_reader(
"/Users/anerishah/Desktop/SSW810/WEEK 8/file.txt", 3, "|",
False)
], [("123", "Jin He", "Computer Science"),
("234", "Nanda Koka", "Software Engineering"),
("345", "Benji Cai", "Software Engineering")])
def _read_major(self, path: str) -> None:
""" read each line from majors file and create instance of class major
and if the file not found or any value error, it raises an exception """
try:
for major, req, course in file_reader(path,
3,
sep='\t',
header=True):
if major not in self._major:
self._major[major] = Major(major)
self._major[major].add_course_re(req, course)
except (FileNotFoundError, ValueError) as e:
print(e)
def _read_grades(self, path: str) -> None:
""" read the student_cwid, course, grade, instructor_cwid from the grades file
and checks for the individual student and the individual instructor.
Raises an exception when unknown student is found"""
try:
for student_cwid, course, grade, instructor_cwid in file_reader(
path, 4, sep='\t', header=True):
try:
s: Student = self._students[student_cwid]
s.add_course_grade(course, grade)
except KeyError:
print(f"Found grade for unknown student {student_cwid}")
try:
inst: Instructor = self._instructors[instructor_cwid]
inst.add_course_student(course)
except KeyError:
print(f"Found grade for unknown student {instructor_cwid}")
except (FileNotFoundError, ValueError) as e:
print(e)