def _read_customers(self, path):
""" read customer from path and add to self._customers """
try:
for cust_id, cust_name in file_reader(path, 2, sep=",", header=True):
if cust_id in self._customers:
print(f'customer id already there {cust_id}')
else:
self._customers[cust_id] = Customer(cust_id, cust_name)
except ValueError as err:
print(err)
def _read_products(self, path):
"""read product file"""
try:
for prod_id, store_id, prod_name in file_reader(path, 3, sep="|", header=False):
if prod_id in self._products:
print(f"product id already exists {prod_id}")
else:
self._stores[store_id].add_productname(prod_id, prod_name)
except ValueError as err:
print(err)
def _read_stores(self, path):
"""read store file"""
try:
for store_id, store_name in file_reader(path, 2, sep="*", header=True):
if store_id in self._stores:
print(f"Store id already there {store_id}")
else:
self._stores[store_id] = Store(store_id, store_name)
except ValueError as err:
print(err)
def _read_inventory(self, path):
"""read inventory file"""
try:
for store_id, available_quantity, product_id in file_reader(path, 3, sep="|", header=True):
if store_id in self._stores:
self._stores[store_id].add_inventory(available_quantity, product_id)
else:
print(f"Warning: Store id does not exists {store_id}")
except ValueError as err:
print(err)
def read_instructors(self, path):
try:
for cwid, name, dept in file_reader(path,
3,
sep="\t",
header=False):
if cwid in self._instructors:
print(f"already exists {cwid}")
else:
self._instructors[cwid] = Instructor(cwid, name, dept)
except ValueError as err:
print(err)
def read_students(self, path):
try:
for cwid, name, major in file_reader(path,
3,
sep="\t",
header=False):
if cwid in self._students:
print(f"ALready exists {cwid}")
else:
self._students[cwid] = Student(cwid, name, major)
except ValueError as err:
print(err)
def read_majors(self, path):
"""read the majors from major.txt"""
try:
for major, flag, course in file_reader(path,
3,
sep='\t',
header=False):
if major in self._majors:
self._majors[major].add_course(flag, course)
else:
self._majors[major] = Major(major)
self._majors[major].add_course(flag, course)
except ValueError as err:
print(err)
def read_students(self, path):
"""read the students.txt"""
try:
for cwid, name, major in file_reader(path,
3,
sep="\t",
header=False):
if cwid in self._students:
print(f"{cwid} is already there")
else:
self._students[cwid] = Student(cwid, name, major,
self._majors[major])
except ValueError as err:
print(err)
def _read_transactions(self, path):
"""read transaction file"""
try:
for cust_id, quantity, prod_id, store_id in file_reader(path, 4, sep="|", header=True):
if cust_id in self._customers:
available_product = self._stores[store_id].available_product(prod_id)
self._customers[cust_id].add_quantity(self._stores[store_id]._product_name[prod_id], quantity
if int(quantity) < available_product else available_product)
else:
print(f"Warning: Customer Id {cust_id} does not exist")
if store_id in self._stores:
self._stores[store_id].update_inv(prod_id, quantity, self._customers[cust_id]._name)
else:
print(f"Warning: Store Id {store_id} does not exist")
except ValueError as err:
print(err)
def read_grades(self, path):
"""read the file grades.txt"""
try:
for student_cwid, course, grade, instructor_cwid in file_reader(
path, 4, sep='\t', header=False):
if student_cwid in self._students:
self._students[student_cwid].add_course(course, grade)
else:
print(
f"Warning: Student cwid {student_cwid} doesnt exist in students file"
)
if instructor_cwid in self._instructors:
self._instructors[instructor_cwid].add_course(
course) # using the instructor cwid as key
else:
print(
f"Warning: instructor cwid {instructor_cwid} doesnt exist in instructor file"
)
except ValueError as erf:
print(erf)