The life of TB

# Mutable objectl = [1, 2, 3]print(f"Address of l is {id(l)}")l += [4]print(f"Address of l is {id(l)}")# Immutable objects = 'abc'print(f"Address of s is {id(s)}")s += 'd'print(f"Address of s is {id(s)}")# Output:Address of l is 1621540708864Address of l is 1621540708864Address of s is 1621541747712Address of s is 1621542153616

Python 2024. 12. 23. 17:06

# Exceptionstry: result = 1 / 0except Exception as e: print(f"'{e}' error occurred!")lst = [1, 2, 3]try: print(lst[3])except Exception as e: print(f"'{e}' error occurred!")# 결과'division by zero' error occurred!'list index out of range' error occurred! # Try, except, else# - The else block in a try statement is executed only if# no exceptions are raised in the try block.# Try, except,..

Python 2024. 12. 23. 15:05

# convert a given number of seconds into hours, minutes, # and secondstotal_seconds = 7385hours, remaining_seconds = divmod(total_seconds, 3600)minutes, second = divmod(remaining_seconds, 60)print(f"{total_seconds=}", end=' ')print(f"{hours=}", end=' ')print(f"{minutes=}", end=' ')print(f"{second=}")# 결과total_seconds=7385 hours=2 minutes=3 second=5 from datetime import datefrom datetime import t..

Python 2024. 12. 23. 11:08

# Types of Testing# ================# Unit Testing:# - Tests individual components or functions in isolation.# - Ensures that each part of the code works correctly on its own.## Integration Testing:# - Tests the interaction between different components or modules.# - Ensures that integrated parts of the application work together.## Testing in Python# =================# unittest# - Buil..

Python 2024. 12. 23. 08:44

# Decorators# ==========# Decorator funcdef printer(func): def wrapper(*args, **kwargs): print("Before calling {func.__name__}()...") func(*args, **kwargs) print("After calling {func.__name__}()...") return wrapper# func to be decorateddef say_hello(name: str): print(f"Hello, {name}")# say_hello("John")# method 1. Create another functionsay_to_person = printer(say_h..

Python 2024. 12. 23. 08:41

http://stackoverflow.com/questions/231767/the-python-yield-keyword-explained IterablesTo understand what yield does, you must understand what generators are. And before generators come iterables. When you create a list, you can read its items one by one, and it's called iteration :>>> mylist = [1, 2, 3]>>> for i in mylist :...    print(i)123Mylist is an iterable. When you use a comprehension lis..

Python 2024. 12. 22. 19:02

# Duck Typing with Protocols# ==========================# Duck Typing is a powerful feature of Python# that allows us to write flexible code by focusing# on the behavior of objects, not their type.from typing import Protocolclass Flyer(Protocol): def fly(self) -> str: ...class Bird: def fly(self) -> str: return 'Bird is flying'class Airplane: def fly(self) -> str: return '..

Python 2024. 12. 20. 16:13

# Enums# =====# Key Features:# - Enums are iterable: You can loop through an Enum class.# - Unique values: Enum members are uniquel; two# members cannot have the same value.# - Immutable: Enum members are constants and cannot be modified.from enum import Enumclass Color(Enum): RED = 1 GREEN = 2 BLUE = 3red = Color.REDgreen = Color.GREENprint(red == Color.RED)print(red == gre..

Python 2024. 12. 20. 15:38