AI-Learning

increment = lambda x: x + 1
print(increment(10))

numbers = [5, 10, 15]
for n in numbers:
print(n + 2)

import os
os.remove("example.txt")

class MyClass:
def instance_method(self):
print("This is an instance method")

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

class A:
pass

class B(A):
pass

class C(B):
pass

obj = C()
print(isinstance(obj, A))

class MyClass:
class_variable = 0

@classmethod
def increment(cls):
cls.class_variable += 1

obj1 = MyClass()
obj2 = MyClass()

obj1.increment()
obj2.increment()
print(MyClass.class_variable)

class MyClass:
class_variable = "shared"

obj = MyClass()
print(obj.class_variable)

age = 17
result = "未成年" if age < 20 else "成人"
print(result)

def append_item(item, items=[]):
items.append(item)
return items

class MyClass:
def greet(self):
return "Hello!"

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

# パッケージ構造:
# package/
# ├── __init__.py
# ├── module1.py
# ├── subpackage/
# │ ├── __init__.py
# │ ├── module2.py
# module2.py から module1 をインポートする

def check_value(x):
if x < 0:
raise ValueError("Negative value not allowed")
return x * 2

try:
print(check_value(-5))
except ValueError as e:
print("Error:", e)

add = lambda x, y=10: x + y
print(add(5))

from datetime import datetime

date = datetime(2024, 2, 29)
days_to_add = 365
new_date = date.replace(year=date.year + 1) + timedelta(days=days_to_add - 1)
print(new_date.strftime("%Y-%m-%d"))

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)

$ pip freeze > requirements.txt
$ cat requirements.txt

class Parent:
def greet(self):
return "Hello from Parent!"

class Child(Parent):
def greet(self):
return super().greet() + " and Child!"

obj = Child()
print(obj.greet())

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

x = 10

def modify_variable():
global x
x = "Hello"

modify_variable()
print(x)

my_dict = {i: i**2 for i in range(3)}
print(my_dict)

score = 85
result = "優秀" if score >= 90 else "合格" if score >= 60 else "不合格"
print(result)

def format_text(text, uppercase=False, exclamation=False):
if uppercase:
text = text.upper()
if exclamation:
text += "!"
return text

print(format_text("hello", uppercase=True, exclamation=True))

import unittest

class TestExample(unittest.TestCase):
def test_exception(self):
with self.assertRaises(ZeroDivisionError):
result = 1 / 0

if __name__ == "__main__":
unittest.main()

num = 12
if num % 3 == 0:
print("3の倍数")
elif num % 4 == 0:
print("4の倍数")
else:
print("3でも4でもない")

import urllib.request

req = urllib.request.Request("https://www.example.com")
response = urllib.request.urlopen(req)
headers = dict(response.getheaders())
print(headers)

data = [["x", "y"], ["z", ["a", "b", "c"]], ["d", "e"]]
print(data[1][1][2])

# パッケージ構造:
# package/
# ├── __init__.py
# ├── subpackage/
# │ ├── __init__.py
# │ ├── module.py
# subpackage/__init__.py
from .module import hello

# main.py
from package.subpackage import hello
print(hello())

def my_function():
y = 7
print(y)

my_function()
print(y)

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

age = 18
result = "成人" if age >= 20 else "未成年"
print(result)