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item_008.py
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executable file
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#!/usr/bin/env PYTHONHASHSEED=1234 python3
# Copyright 2014-2024 Brett Slatkin, Pearson Education Inc.
#
# Licensed under the Apache License, Version 2.0 (the "License");
# you may not use this file except in compliance with the License.
# You may obtain a copy of the License at
#
# http://www.apache.org/licenses/LICENSE-2.0
#
# Unless required by applicable law or agreed to in writing, software
# distributed under the License is distributed on an "AS IS" BASIS,
# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
# See the License for the specific language governing permissions and
# limitations under the License.
### 책 예제에 맞는 환경 설정을 시작함
import random
random.seed(1234)
import logging
from pprint import pprint
from sys import stdout as STDOUT
# 모든 출력을 임시 디렉터리로 보냄
import atexit
import gc
import io
import os
import tempfile
TEST_DIR = tempfile.TemporaryDirectory()
atexit.register(TEST_DIR.cleanup)
# 윈도우에서 프로세스가 제대로 종료되도록 함
OLD_CWD = os.getcwd()
atexit.register(lambda: os.chdir(OLD_CWD))
os.chdir(TEST_DIR.name)
def close_open_files():
everything = gc.get_objects()
for obj in everything:
if isinstance(obj, io.IOBase):
obj.close()
atexit.register(close_open_files)
### 책 예제에 맞는 환경설정 끝
print("아이템 8")
print("Example 1")
fresh_fruit = {
"사과": 10,
"바나나": 8,
"레몬": 5,
}
print("Example 2")
def make_lemonade(count):
print(f"{count} 레몬을 레모네이드로 만듭니다")
def out_of_stock():
print("Out of stock!")
count = fresh_fruit.get("레몬", 0)
if count:
make_lemonade(count)
else:
out_of_stock()
print("Example 3")
if count := fresh_fruit.get("레몬", 0):
make_lemonade(count)
else:
out_of_stock()
print("Example 4")
def make_cider(count):
print(f"{count} 사과를 사과주스로 만듭니다")
count = fresh_fruit.get("사과", 0)
if count >= 4:
make_cider(count)
else:
out_of_stock()
print("Example 5")
if (count := fresh_fruit.get("사과", 0)) >= 4:
make_cider(count)
else:
out_of_stock()
print("Example 6")
def slice_bananas(count):
print(f"{count} 바나나를 슬라이스합니다")
return count * 4
class OutOfBananas(Exception):
pass
def make_smoothies(count):
print(f"{count} 바나나 슬라이스를 스무디로 만듭니다")
pieces = 0
count = fresh_fruit.get("바나나", 0)
if count >= 2:
pieces = slice_bananas(count)
try:
smoothies = make_smoothies(pieces)
except OutOfBananas:
out_of_stock()
print("Example 7")
count = fresh_fruit.get("바나나", 0)
if count >= 2:
pieces = slice_bananas(count)
else:
pieces = 0 # 옮겨짐
try:
smoothies = make_smoothies(pieces)
except OutOfBananas:
out_of_stock()
print("Example 8")
pieces = 0
if (count := fresh_fruit.get("바나나", 0)) >= 2: # 변경함
pieces = slice_bananas(count)
try:
smoothies = make_smoothies(pieces)
except OutOfBananas:
out_of_stock()
print("Example 9")
if (count := fresh_fruit.get("바나나", 0)) >= 2:
pieces = slice_bananas(count)
else:
pieces = 0 # Moved
try:
smoothies = make_smoothies(pieces)
except OutOfBananas:
out_of_stock()
print("Example 10")
count = fresh_fruit.get("바나나", 0)
if count >= 2:
pieces = slice_bananas(count)
to_enjoy = make_smoothies(pieces)
else:
count = fresh_fruit.get("사과", 0)
if count >= 4:
to_enjoy = make_cider(count)
else:
count = fresh_fruit.get("레몬", 0)
if count:
to_enjoy = make_lemonade(count)
else:
to_enjoy = "없음"
print("Example 11")
if (count := fresh_fruit.get("바나나", 0)) >= 2:
pieces = slice_bananas(count)
to_enjoy = make_smoothies(pieces)
elif (count := fresh_fruit.get("사과", 0)) >= 4:
to_enjoy = make_cider(count)
elif count := fresh_fruit.get("레몬", 0):
to_enjoy = make_lemonade(count)
else:
to_enjoy = "없음"
print("Example 12")
FRUIT_TO_PICK = [
{"사과": 1, "바나나": 3},
{"레몬": 2, "라임": 5},
{"오렌지": 3, "멜론": 2},
]
def pick_fruit():
if FRUIT_TO_PICK:
return FRUIT_TO_PICK.pop(0)
else:
return []
def make_juice(fruit, count):
return [(fruit, count)]
bottles = []
fresh_fruit = pick_fruit()
while fresh_fruit:
for fruit, count in fresh_fruit.items():
batch = make_juice(fruit, count)
bottles.extend(batch)
fresh_fruit = pick_fruit()
print(bottles)
print("Example 13")
FRUIT_TO_PICK = [
{"사과": 1, "바나나": 3},
{"레몬": 2, "라임": 5},
{"오렌지": 3, "멜론": 2},
]
bottles = []
while True: # 무한 루프
fresh_fruit = pick_fruit()
if not fresh_fruit: # 중간에서 끝내기
break
for fruit, count in fresh_fruit.items():
batch = make_juice(fruit, count)
bottles.extend(batch)
print(bottles)
print("Example 14")
FRUIT_TO_PICK = [
{"사과": 1, "바나나": 3},
{"레몬": 2, "라임": 5},
{"오렌지": 3, "멜론": 2},
]
bottles = []
while fresh_fruit := pick_fruit(): # 변경함
for fruit, count in fresh_fruit.items():
batch = make_juice(fruit, count)
bottles.extend(batch)
print(bottles)