item_08.py

#!/usr/bin/env PYTHONHASHSEED=1234 python3

# Copyright 2014-2019 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.

# Reproduce book environment
import random
random.seed(1234)

import logging
from pprint import pprint
from sys import stdout as STDOUT

# Write all output to a temporary directory
import atexit
import gc
import io
import os
import tempfile

TEST_DIR = tempfile.TemporaryDirectory()
atexit.register(TEST_DIR.cleanup)

# Make sure Windows processes exit cleanly
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)


# Example 1
names = ['Cecilia', 'Lise', 'Marie']
counts = [len(n) for n in names]
print(counts)


# Example 2
longest_name = None
max_count = 0

for i in range(len(names)):
    count = counts[i]
    if count > max_count:
        longest_name = names[i]
        max_count = count

print(longest_name)


# Example 3
longest_name = None
max_count = 0
for i, name in enumerate(names):
    count = counts[i]
    if count > max_count:
        longest_name = name
        max_count = count
assert longest_name == 'Cecilia'


# Example 4
longest_name = None
max_count = 0
for name, count in zip(names, counts):
    if count > max_count:
        longest_name = name
        max_count = count
assert longest_name == 'Cecilia'


# Example 5
names.append('Rosalind')
for name, count in zip(names, counts):
    print(name)


# Example 6
import itertools

for name, count in itertools.zip_longest(names, counts):
    print(f'{name}: {count}')