AI-Learning

def greet_many(times, name="Guest"):
return (f"Hello, {name}!" * times).strip()

print(greet_many(2))
print(greet_many(3, "Alice"))

class Parent:
def __init__(self):
self.name = "Parent"

class Child(Parent):
pass

obj = Child()
print(obj.name)

class Base:
pass

class Derived(Base):
pass

obj = Derived()
print(isinstance(obj, Derived))
print(isinstance(obj, Base))

class A:
pass

class B(A):
pass

class C:
pass

print(isinstance(B(), A))
print(isinstance(C(), A))

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

try:
raise ValueError("An error occurred")
except ValueError:
print("Caught ValueError")
finally:
print("Executing cleanup")

try:
raise ValueError("An error occurred")
except ValueError:
print("Caught ValueError")
finally:
print("Executing cleanup")

def describe_person(name, age=30, country="Japan"):
print(f"{name} is {age} years old and lives in {country}.")

describe_person("Bob", country="USA")

try:
print("Start")
finally:
print("Cleanup complete")

temperature = 22
if temperature > 30:
print("暑いです")
elif temperature >= 20:
print("快適です")
else:
print("寒いです")

class MyClass:
class_variable = 5

obj1 = MyClass()
obj1.class_variable += 1

print(MyClass.class_variable)

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)

a = 3
b = 5
result = "aとbは等しい" if a == b else "aはbより小さい" if a < b else "aはbより大きい"
print(result)

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)

z = [10, 20, 30]

def modify_list():
global z
z[1] = 99

modify_list()
print(z)

x = 3

def modify_variable():
global x
x = x * 2
return x

print(modify_variable())
print(x)

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

my_dict = {'x': 10, 'y': 20, 'z': 30}
my_dict.clear()
print(my_dict)

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

class MyClass:
def __init__(self, name):
self.name = name

def greet(self):
return f"Hello, {self.name}!"

import sys
if len(sys.argv) > 2:
print(sys.argv[2])
else:
print("No second argument")

実行コマンド：python script.py input.txt

while True
print("Looping")

f = open('sample.txt', 'w')
f.write("Hello, World!")
f.close()

# パッケージ構造:
# package/
# ├── __init__.py
# ├── module1.py
# ├── subpackage/
# │ ├── __init__.py
# │ ├── module2.py
# module2.py
from ..module1 import add
print(add(10, 20))

# module1.py
def add(a, b):
return a + b

import unittest

class TestExample(unittest.TestCase):
def test_something(self):
self.assertTrue(True)

items = [(2, "b"), (3, "c"), (1, "a")]
sorted_items = sorted(items)
print(sorted_items)

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

class MyClass:
pass

obj = MyClass()
print(isinstance(obj, MyClass))

import json
data = {"numbers": [10, 20, 30, 40]}
json_data = json.dumps(data, separators=(",", ":"))
print(json_data)

f = open('sample.txt', 'w')
f.write("Test content")
# プログラムがここで終了した場合

class MyClass:
def __init__(self, values):
self.values = values

obj = MyClass([1, 2, 3])
obj.values[0] = 10
print(obj.values)

class Parent:
pass

class Child(Parent):
pass

obj = Child()
print(isinstance(obj, Parent))

data = None
result = "値がありません" if data is None else "値があります"
print(result)

lst = [1, 2, 3]
lst.extend([4, 5])
print(lst)

import argparse
parser = argparse.ArgumentParser()
parser.add_argument("-n", "--name", required=True, help="Specify the name")
parser.add_argument("-a", "--age", type=int, help="Specify the age")
args = parser.parse_args()
print(f"Name: {args.name}, Age: {args.age}")

実行コマンド：python script.py -n Alice -a 30

my_dict = {'a': 10, 'b': 20}
new_dict = {key: my_dict.get(key, 0) + 5 for key in ['a', 'c']}
print(new_dict)