AI-Learning

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

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

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

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

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

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

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

value = [123.456, 78.9, 4.321]
formatted = " | ".join("{:.1f}".format(v) for v in value)
print(formatted)

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)

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

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

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)

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
# ---
with open('sample.txt', 'w') as f:
f.write("New Line")
f.seek(0)
f.write("Old")

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

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

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

$ python -m venv myenv
$ source myenv/bin/activate
$ which python

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

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

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

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

# ファイル名: sample.txt
# 初期内容:
# ---
# Line1
# Line2
# ---
with open('sample.txt', 'w') as f:
f.writelines(["New1\n", "New2\n", "New3\n"])

a, b = 0, 10
result = "成立" if a != 0 and b / a > 2 else "不成立"
print(result)

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)

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

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

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

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

value = []
result = "空のリストです" if not value else "リストに値があります"
print(result)

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