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+```python
+def foo() -> int :
+	return x ** 2
+
+
+x = foo( 2 )
+print(x) # 5
+
+
+def foo( x : str, y : int ) -> str :
+    ...........
+
+
+name = input('Ведите имя:') # - всегда строка!
+print(dir(name)) # - вывод атрибутов
+
+# ['__add__', '__class__', '__contains__', '__delattr__', '__dir__', '__doc__', '__eq__', '__format__', '__ge__', '__getattribute__', '__getitem__', '__getnewargs__', '__getstate__', '__gt__', '__hash__', '__init__', '__init_subclass__', '__iter__', '__le__', '__len__', '__lt__', '__mod__', '__mul__', '__ne__', '__new__', '__reduce__', '__reduce_ex__', '__repr__', '__rmod__', '__rmul__', '__setattr__', '__sizeof__', '__str__', '__subclasshook__', 'capitalize', 'casefold', 'center', 'count', 'encode', 'endswith', 'expandtabs', 'find', 'format', 'format_map', 'index', 'isalnum', 'isalpha', 'isascii', 'isdecimal', 'isdigit', 'isidentifier', 'islower', 'isnumeric', 'isprintable', 'isspace', 'istitle', 'isupper', 'join', 'ljust', 'lower', 'lstrip', 'maketrans', 'partition', 'removeprefix', 'removesuffix', 'replace', 'rfind', 'rindex', 'rjust', 'rpartition', 'rsplit', 'rstrip', 'split', 'splitlines', 'startswith', 'strip', 'swapcase', 'title', 'translate', 'upper', 'zfill']
+#
+```
+
+```python
+# собираем все параметры в кортеж:
+
+def sum_nums(*args):
+	print(args)
+	print(type(args))
+	print(args[0])
+	return sum(args)
+
+
+print(sum_nums(2, 3, 7))
+``` 
+
+```python
+# аргументы с ключевыми словами - порядок не важен:
+
+def get_post_info(name, post_qty):
+	info = f"{name} wrote {post_qty} posts"
+	return info
+  
+
+info = get_post_info(name='Vlapa', post_qty=50)
+print(info)
+```
+
+```python
+# объединение аргументов в DICT (только именованные):
+
+def get_post_info(**person):
+	print(person)
+	print(type(person))
+	info = (
+	f"{person['name']} wrote "
+	f"{person['post_qty']} posts"
+	)
+	return info
+
+info = get_post_info(name='Vlapa', post_qty=50)
+print(info)
+```
+
+```python
+# значение по умолчанию:
+
+def mult_by(value, multiplier=1):
+	return value * multiplier
+
+print(mult_by(10, 2))
+print(mult_by(5))
+
+```
+
+```python
+# 
+
+from datetime import date
+
+  
+def get_weekday():
+	return date.today().strftime('%A')
+
+  
+def create_new_post(post, weekday=get_weekday()):
+	post_copy = post.copy()
+	post_copy['created_on_weekday'] = weekday
+	return post_copy
+
+
+initial_post = {
+	'id': 234,
+	'author': 'Vlapa',
+}
+
+post_with_weekday = create_new_post(initial_post)
+```
+
+```python
+# callback function
+
+def print_number_info(num):
+	"""
+	Print num information
+	Args:
+		num (int): Integer number
+	"""
+	if (num % 2) == 0:
+	print("Число четное")
+else:
+	print("Число НЕ четное")
+
+
+def print_square_num(num):
+	print("Square of the num is", num * num)
+
+
+def process_number(num, callback_fn):
+	callback_fn(num)
+
+  
+entered_num = int(input("Введите любое целое число: "))
+
+process_number(entered_num, print_number_info)
+process_number(entered_num, print_square_num)
+```
+
+```python
+print(dir()) # все переменные области
+```
+
+```python
+def greeting(greet):
+	return lambda name: f"{greet}, {name}!"
+	
+	# def info(name):
+	#	 return f"{greet}, {name}!"
+	# return info
+
+morning_greeting = greeting("Good Morning")
+
+print(morning_greeting('Vlapa'))
+
+evening_greeting = greeting("Good Evening")
+
+print(evening_greeting('Vlapa'))
+```
+======================================================
+### Голобурдин:
+
+```python
+def chain_sum0(number):
+	result = number
+	def wrapper(number2=None):
+		nonlocal result
+		if number2 is None:
+			return result
+		result += number2
+		return wrapper
+	return wrapper
+	
+
+def chain_sum00(number):
+	result = number
+	def wrapper(number2=None):
+		nonlocal result
+		try:
+			number2 = int(number2)
+		except TypeError:
+			return result
+		result += number2
+		return wrapper
+	return wrapper
+	
+
+def chain_sum(number):
+	def wrapper(number2=None):
+		def inner():
+			wrapper.result += number2
+		return wrapper
+		logic = {
+			type(None): lambda: wrapper.result,
+			int: inner
+		}
+		return logic[type(number2)]()
+	wrapper.result = number
+	return wrapper
+
+
+print(chain_sum(5)())
+print(chain_sum(5)(2)())
+print(chain_sum(5)(100)(-10)())
+```
+