AI-Learning

number = 0
result = "ゼロです" if not number else "ゼロ以外の数です"
print(result)

# empty.txt は空のファイル
with open('empty.txt', 'r') as f:
print(f.read())

value = 123.456789
formatted = "{:.2f}".format(value)
print(formatted)

value = 255
formatted = "{:#o}".format(value)
print(formatted)

items = [None, 0, "", False]
result = "有効な要素が含まれていません" if not any(items) else "有効な要素が含まれています"
print(result)

python -m venv env

x = 10
result = "非ゼロ" if x and x % 2 == 0 else "ゼロまたは奇数"
print(result)

# sample.txt は存在しない
try:
with open('sample.txt', 'w+') as f:
f.write("Testing w+ mode")
f.seek(0)
print(f.read())
except Exception as e:
print(f"Error: {e}")

username = None
result = "ユーザー名が設定されています" if username else "ユーザー名が設定されていません"
print(result)

value = 1234
formatted = "{:08}".format(value)
print(formatted)

# sample.txt
# ---
# Hello, Python!
# ---
with open('sample.txt', 'r') as f:
for line in f:
print(line, end="")

value = "Python"
formatted = "{:^10}".format(value)
print(formatted)

# sample.txt
# ---
# Line1
# Line2
# ---
with open('sample.txt', 'r') as f:
for line in f:
print(line.strip())

# ファイル名: sample.txt
# 初期内容:
# ---
# Line1
# ---
with open('sample.txt', 'w') as f:
f.write("New Line")
f.seek(0)
f.write("Old")

# sample.txt
# ---
# Python Programming
# File Handling
# ---
with open('sample.txt', 'r') as f:
print(f.read(15))
print(f.read())

n = 10
result = "偶数かつ5の倍数" if n % 2 == 0 and n % 5 == 0 else "条件を満たさない"
print(result)

# sample.txt
# 初期内容: なし
try:
with open('sample.txt', 'x') as f:
f.write("New File Content")
f.write("\nSecond Line")
except FileExistsError:
print("File already exists")

$ python -m venv env
$ source env/bin/activate
$ deactivate
$ rm -rf env
$ which python

# ファイル名: sample.txt
with open('sample.txt', 'w') as f:
f.write("First Line\n")
f.flush()
f.write("Second Line\n")

with open('sample.txt', 'a') as f:
f.write("Appended Text\n")

# sample.txt
# ---
# Line1
# Line2
# ---
with open('sample.txt', 'r') as f:
print(f.tell())
f.read(5)
print(f.tell())

$ python -m venv env
$ source env/bin/activate

# sample.txt は存在しない
try:
with open('sample.txt', 'r+') as f:
f.write("Hello, World!")
except FileNotFoundError:
print("File not found")

value = 12345
formatted = "{:,}".format(value)
print(formatted)

# sample.txt
# ---
# Hello, World!
# ---
with open('sample.txt', 'r') as f:
print(f.read())

x = 0
result = "ゼロ以外" if x or x + 5 else "ゼロです"
print(result)

a, b = 10, 0
result = "実行されました" if a > 5 or b / 0 else "実行されませんでした"
print(result)

# sample.txt
# ---
# Hello, Python!
# Welcome to the world of programming.
# ---
with open('sample.txt', 'r') as f:
print(f.readline())

items = [1, 2, 3]
result = "リストに要素があります" if items else "リストは空です"
print(result)

# sample.txt
# ---
# Python is fun.
# File Handling is useful.
# ---
with open('sample.txt', 'r') as f:
print(f.readlines()[-1])

elements = [True, True, False]
result = "すべてがTrueです" if all(elements) else "Falseが含まれています"
print(result)

data = {"name": "Alice", "age": 25, "score": 92.5}
formatted = "{name} is {age} years old and scored {score:.1f}.".format(**data)
print(formatted)