def test_file_reader(self) -> None:
"""
In this function, we will the file_reader() function
"""
result = [['123', 'Jin He', 'Computer Science'],
['234', 'Nanda Koka', 'Software Engineering'],
['345', 'Benji Cai', 'Software Engineering']]
self.assertEqual(
list(file_reader('./student_majors.txt', 3, '|', True)), result)
self.assertNotEqual(
list(file_reader('./student_majors.txt', 3, '|')), result)
with self.assertRaises(ValueError):
list(file_reader('./student_majors.txt', 4, '|', True))
with self.assertRaises(FileNotFoundError):
list(file_reader('abc.txt', 3, '|', True))
def _read_grades(self) -> None:
"""
In this method, we will be reading the grades of each student.
"""
try:
for stud_cwid, course, grade, prof_cwid in file_reader(
os.path.join(self._path, "grades.txt"),
fields=4,
sep='\t',
header=False):
if stud_cwid in self._students:
# handle the key error if a new student
s: Student = self._students[stud_cwid]
s.add_course(course=course, grade=grade)
else:
raise KeyError(f"No such Student with {stud_cwid}")
if prof_cwid in self._instructors:
# handle the key error if a new instructor
p: Instructor = self._instructors[prof_cwid]
p.inst_courses_add(course)
else:
raise KeyError(f"No such Student with {prof_cwid}")
except FileNotFoundError:
print(f"Cannot open file at {self._path}")
except ValueError:
print("Wrong input")
def _read_majors(self) -> None:
"""
Reading each major and creating its instance
"""
try:
for major, type, course in file_reader(os.path.join(self._path,
"majors.txt"),
3, sep='\t', header=True):
if major not in self._majors:
self._majors[major] = Major(major)
self._majors[major].add_course(type, course)
except FileNotFoundError:
print(f"Cannot open file at {self._path}")
def _read_instructors(self) -> None:
"""
In this method, we will be reading each student and creating
instances of each instructor as soon as it is read.
"""
try:
for cwid, name, dept in file_reader(os.path.join
(self._path,
"instructors.txt"),
3, sep='|', header=True):
if cwid in self._instructors:
print("Instructor with CWID is already in the file")
self._instructors[cwid] = Instructor(cwid, name, dept)
except (FileNotFoundError, ValueError) as e:
print(f"Cannot open file at {self._path}")
except ValueError:
print("Missing field")
def _read_students(self) -> None:
"""
In this method, we will be reading each student and creating
instances of each student as soon as it is read.
"""
try:
for cwid, name, major in file_reader(os.path.join(
self._path, "students.txt"),
fields=3,
sep='\t',
header=False):
if cwid in self._students:
raise KeyError("Student with CWID is already in the file")
self._students[cwid] = Student(cwid, name, major)
except FileNotFoundError:
print(f"Cannot open file at {self._path}")
except ValueError:
print("Missing field")
def _read_students(self) -> None:
"""
In this method, we will be reading each student and creating
instances of each student as soon as it is read.
"""
try:
for cwid, name, major in file_reader(os.path.join(self._path,
"students.txt"),
3, sep=';', header=True):
if cwid in self._students:
print("Student with CWID is already in the file")
required: List[str] = self._majors[major].get_required()
electives: List[str] = self._majors[major].get_electives()
self._students[cwid] = Student(
cwid, name, major, required, electives)
except FileNotFoundError:
print(f"Cannot open file at {self._path}")
except ValueError:
print("Missing field")