def load_guitars():
guitars = []
with open("the_guitar_list.csv", "r") as file:
read_guitars = list(csv.reader(file))
for temp_guitars in read_guitars:
name = temp_guitars[0]
year = int(temp_guitars[1])
cost = float(temp_guitars[2])
new_guitar = Guitar(name, year, cost)
guitars.append(new_guitar)
print(str(len(guitars)) + " guitars loaded")
return guitars
def get_guitars():
guitars = list()
user_input = input('Add a guitar? (y/n)\n>>>')
if user_input == 'y':
new_name = input('Enter name of guitar: ')
while len(new_name) == 0:
new_name = input('Name cannot be blank!\nEnter name of guitar: ')
new_year = add_number('integer', 'Enter year guitar was made: ')
new_price = add_number('float', 'Enter price of guitar: ')
guitars.append(Guitar(new_name, new_year, new_price))
elif len(guitars) == 0:
print('You have no guitars')
def add_new_guitar(guitars):
while True:
try:
name = input("name: ")
if not name:
print("input can not be blank")
raise ValueError()
for guitar in guitars:
if name.lower() == str(guitar.name).lower():
print("the guitar is already in the list")
raise ValueError()
break
except ValueError:
continue
while True:
try:
year = input("Year: ")
try:
year = int(year)
except ValueError:
print("invalid input; enter a valid year")
continue
if year < 0:
print("The year must be >= 0")
raise ValueError()
if len(str(year)) < 4 or len(str(year)) > 4:
print("the year must have 4 digits; enter a valid year")
raise ValueError
break
except ValueError:
continue
while True:
try:
cost = input("Cost: ")
try:
cost = float(cost)
except ValueError:
print("invalid input; enter a valid cost")
continue
if cost < 0:
print("The cost must be >= 0")
raise ValueError()
break
except ValueError:
continue
new_guitar = Guitar(name, year, cost)
guitars.append(new_guitar)
print("{} ({}): {} added to guitar list".format(name, year, cost))
main_menu(guitars)
def add_new_guitar(guitars):
while True:
name = input("name: ")
year = input("Year: ")
cost = input("Cost: ")
if not name:
if not year:
if not cost:
list_guitars(guitars)
raise SystemExit(0)
else:
new_guitar = Guitar(name, int(year), int(cost))
guitars.append(new_guitar)
print("{} ({}): {} added to guitar list".format(name, year, cost))
"""
practical 07 - do from scratch exercise
"""
from Guitars import Guitar
def guitar_test(guitar, expected):
got = [guitar.get_age(), guitar.is_vintage()]
print("{} get_age() - expected {}. got {}".format(guitar.name, expected[0],
got[0]))
print("{} is_vintage() - expected {}. got {}".format(
guitar.name, expected[1], got[1]))
first_guitar = Guitar("Gibson L-5 CES", 1922, 16035.40)
guitar_test(first_guitar, [95, "True"])
another_guitar = Guitar("Another Guitar", 2012, 999.99)
guitar_test(another_guitar, [5, "False"])
from Guitars import Guitar
guitars = [Guitar('Fender Stratocaster', 2014, 765.4), Guitar("Gibson L-5 CES", 1922, 16035.40),
Guitar('Line 6 JTV-59', 2010, 1512.9)]
def get_guitars():
guitars = list()
user_input = input('Add a guitar? (y/n)\n>>>')
if user_input == 'y':
new_name = input('Enter name of guitar: ')
while len(new_name) == 0:
new_name = input('Name cannot be blank!\nEnter name of guitar: ')
new_year = add_number('integer', 'Enter year guitar was made: ')
new_price = add_number('float', 'Enter price of guitar: ')
guitars.append(Guitar(new_name, new_year, new_price))
elif len(guitars) == 0:
print('You have no guitars')
def add_number(message, numtype='float'):
try:
if numtype == 'integer':
user_input = int(input(message))
else:
user_input = float(input(message))
except ValueError:
print('Number must be a {0}'.format(numtype))
add_number(numtype, message)