Hej,
Poniższy kod nie chce mi działać:
# example_shop/example_shop.py
from ui.menu import Menu, UserChoice, quit_menu, do_nothing_choice
from ui.shop import ShopUI
from shop.shop import Shop
def main() -> None:
shop = Shop()
shop_ui = ShopUI(shop)
main_menu = Menu('Main menu', items=(
UserChoice('Product list', shop_ui.list_products),
UserChoice('Shopping cart', do_nothing_choice),
UserChoice('Your orders', do_nothing_choice),
UserChoice('Quit', quit_menu)
))
main_menu.loop()
if __name__ == '__main__':
main()
# example_shop/ui/mwnu.py
import enum
from typing import Callable, Iterable, Sequence, NamedTuple, Optional
from user_input import read_number
@enum.uniqueclass BannerStyle(enum.IntEnum):
FRAME_BOX = enum.auto()
HASH = enum.auto()
class UserChoice(NamedTuple):
name: str invoke: Callable[[], Optional[bool]]
def __str__(self) -> str:
return self.name
def format_choices(choices: Sequence[UserChoice]) -> Iterable[str]:
for idx, item in enumerate(choices, 1):
yield f'{idx}) {item}'def read_choice(choices: Sequence[UserChoice]) -> UserChoice:
prompt = '\n'.join((*format_choices(choices),
'Your choice (enter an integer): '))
while True:
index = read_number(prompt, int) - 1 if 0 <= index < len(choices):
return choices[index]
print('Choice out of range.')
class Menu(NamedTuple):
title: str items: Sequence[UserChoice]
banner_style: BannerStyle = BannerStyle.FRAME_BOX
def print_banner(self) -> None:
top_char, edge_char = None, None match self.banner_style:
case BannerStyle.FRAME_BOX:
top_char = '-' edge_char = '|' case BannerStyle.HASH:
top_char = '#' edge_char = '#' print(top_char * (len(self.title) + 4))
print(f'{edge_char} {self.title} {edge_char}')
print(top_char * (len(self.title) + 4))
def loop(self) -> None:
while True:
self.print_banner()
choice = read_choice(self.items)
if choice.invoke():
break print()
def wait_menu() -> None:
input("Press the enter...")
def quit_menu() -> bool:
return Truedef do_nothing_choice() -> None:
""" The replacement function for lambda: None in UserChoice, where UserChoice is the Menu element. """ print('No action defined.')
wait_menu()
# example_shop/ui/shop.py
from example_shop.shop.shop import Shop
from .menu import wait_menu
class ShopUI:
def __init__(self, shop: Shop):
self.shop = shop
def list_products(self):
if self.shop.available_products:
print("Available products:")
for idx, product in enumerate(self.shop.available_products):
print(f"{idx}) {product.name}")
else:
print("No such any products")
wait_menu()
# example_shop/shop/shop.py
from .products import Product
from .users import User
class Shop:
def __init__(self):
self.available_products = []
self.users = []
def count_product(self, product: Product):
return self.available_products.count(product)
def create_user(self, user: User):
self.users.append(user)
def remove_user(self, user: User):
self.users.remove(user)
def add_product(self, product: Product, qty=1):
for _ in range(qty):
self.available_products.append(product)
def remove_product(self, product: Product):
self.available_products.remove(product)
Błąd:
/home/lester29/PycharmProjects/example_shop/venv/bin/python /home/lester29/PycharmProjects/example_shop/example_shop/example_shop.py
Traceback (most recent call last):
File "/home/lester29/PycharmProjects/example_shop/example_shop/example_shop.py", line 2, in <module>
from ui.shop import ShopUI
File "/home/lester29/PycharmProjects/example_shop/example_shop/ui/shop.py", line 1, in <module>
from example_shop.shop.shop import Shop
File "/home/lester29/PycharmProjects/example_shop/example_shop/example_shop.py", line 2, in <module>
from ui.shop import ShopUI
ImportError: cannot import name 'ShopUI' from partially initialized module 'ui.shop' (most likely due to a circular import) (/home/lester29/PycharmProjects/example_shop/example_shop/ui/shop.py)
Process finished with exit code 1
Po zmianie w example_shop/ui/shop.py pierwszej linijki na from ..shop.shop import Shop mam błąd
/home/lester29/PycharmProjects/example_shop/venv/bin/python /home/lester29/PycharmProjects/example_shop/example_shop/example_shop.py
Traceback (most recent call last):
File "/home/lester29/PycharmProjects/example_shop/example_shop/example_shop.py", line 2, in <module>
from ui.shop import ShopUI
File "/home/lester29/PycharmProjects/example_shop/example_shop/ui/shop.py", line 1, in <module>
from ..shop.shop import Shop
ImportError: attempted relative import beyond top-level package
Process finished with exit code 1
Pomoże ktoś?
