AI-Learning

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

# ファイル名: sample.txt
# 初期内容:
# ---
# Line1
# Line2
# ---
with open('sample.txt', 'r+') as f:
f.seek(6)
f.write("Modified")
f.seek(0)
print(f.read())

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

# ファイル名: sample.txt
with open('sample.txt', 'x') as f:
f.write("Exclusive write mode")

x, y = 5, 10
result = "条件成立" if x 5 else "条件不成立"
print(result)

# sample.txt
# ---
# Line1
# Line2
# Line3
# ---
with open('sample.txt', 'r') as f:
print(f.read(5))
print(f.read(5))

items = [0, None, ""]
result = "リストに有効な要素があります" if any(items) else "有効な要素がありません"
print(result)

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

a, b = 5, None
result = "成立" if a > 0 or b is not None else "不成立"
print(result)

# sample.txt
# ---
# Hello, World!
# ---
with open('sample.txt', 'r') as f:
f.seek(7)
print(f.read(5))

name = ""
result = "名前が設定されています" if name else "名前が設定されていません"
print(result)

# ファイル名: sample.txt
# 初期内容:
# ---
# Line1
# Line2
# ---
with open('sample.txt', 'r+') as f:
f.write("New")
f.seek(6)
f.write("Content")

# sample.txt が空の場合
with open('sample.txt', 'r') as f:
data = f.read()
print(data)

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

# sample.txt
# ---
# Initial Line
# ---
with open('sample.txt', 'a+') as f:
f.write("\nAppended Line")
f.seek(0)
print(f.read())

value = ""
result = "空でない値です" if bool(value) else "空の値です"
print(result)

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

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

# sample.txt
# ---
# Line1
# Line2
# ---
with open('sample.txt', 'r') as f:
lines = f.readlines()
print(len(lines))

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

$ python -m venv env
$ source env/bin/activate
$ pip freeze > requirements.txt
$ cat requirements.txt

value = 0.1234
formatted = "{:.2%}".format(value)
print(formatted)

value = 0.98765
formatted = "{:.3e}".format(value)
print(formatted)

# ファイル名: sample.txt
with open('sample.txt', 'w') as f:
f.write("Line1\n")
f.write("Line2\n")
print(f.tell())

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)

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)

# sample.txt
# ---
# Initial Content
# ---
with open('sample.txt', 'w') as f:
f.truncate(5)

# ファイル名: sample.txt
# 初期内容: なし（ファイルは存在しない）
with open('sample.txt', 'a') as f:
f.write("Hello, World!")

$ python -m venv projectenv
$ source projectenv/bin/activate
$ pip install requests
$ pip list

with open('sample.txt', 'w') as f:
f.write("Hello, World!\n")
f.write("Python Programming")

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

# empty.txt は存在しないファイル
try:
with open('empty.txt', 'r') as f:
print(f.read())
except FileNotFoundError as e:
print("File not found!")

x = -5
y = 0
result = "正またはゼロ" if x > 0 or y == 0 else "負"
print(result)