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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 17")
print("Example 1")
from random import randint
random_bits = 0
for i in range(32):
if randint(0, 1):
random_bits |= 1 << i
print(bin(random_bits))
print("Example 2")
flavor_list = ["바닐라", "초콜릿", "피칸", "딸기"]
for flavor in flavor_list:
print(f"{flavor}는 맛있어요.")
print("Example 3")
for i in range(len(flavor_list)):
flavor = flavor_list[i]
print(f"{i + 1}: {flavor}")
print("Example 4")
it = enumerate(flavor_list)
print(next(it))
print(next(it))
print("Example 5")
for i, flavor in enumerate(flavor_list):
print(f"{i + 1}: {flavor}")
print("Example 6")
for i, flavor in enumerate(flavor_list, 1):
print(f"{i}: {flavor}")