import this

class Node:
    def __init__(self, data):
        self.left = None
        self.right = None
        self.data = data

root = Node(1)

root.left = Node(2)
root.right = Node(3)

root.left.left = Node(4)
root.left.right = Node(5)

def preorder_traversal(root):
    if root:
        print(root.data)
        preorder_traversal(root.left)
        preorder_traversal(root.right)

import difflib

words = ['кот', 'собака', 'кит', 'слон']
difflib.get_close_matches('кот', words)

import difflib

str1 = "кот"
str2 = "кит"
diff = difflib.ndiff(str1, str2)
print('\\n'.join(diff))

  к
- о
+ и
  т

import difflib

str1 = "кот"
str2 = "кит"
match = difflib.SequenceMatcher(None, str1, str2)
print(match.ratio())

str1 = '12345'
print(str1.isnumeric())  # Вывод: True

str2 = '12345abc'
print(str2.isnumeric())  # Вывод: False

str3 = 'abc'
print(str3.isalpha())  # Вывод: True

str4 = 'abc123'
print(str4.isalpha())  # Вывод: False

class Node:
    def __init__(self, key):
        self.left = None
        self.right = None
        self.val = key

def insert(root, key):
    if root is None:
        return Node(key)
    else:
        if root.val < key:
            root.right = insert(root.right, key)
        else:
            root.left = insert(root.left, key)
    return root

def inorder(root):
    if root:
        inorder(root.left)
        print(root.val),
        inorder(root.right)

r = Node(50)
r = insert(r, 30)
r = insert(r, 20)
r = insert(r, 40)
r = insert(r, 70)
r = insert(r, 60)
r = insert(r, 80)

inorder(r)

import threading
import time

def loop1():
    for i in range(10):
        print('Loop 1:', i)
        time.sleep(1)

def loop2():
    for i in range(10):
        print('Loop 2:', i)
        time.sleep(1)

thread1 = threading.Thread(target=loop1)
thread2 = threading.Thread(target=loop2)

thread1.start()
thread2.start()

thread1.join()
thread2.join()import threading
import time

def loop1():
    for i in range(10):
        print('Loop 1:', i)
        time.sleep(1)

def loop2():
    for i in range(10):
        print('Loop 2:', i)
        time.sleep(1)

thread1 = threading.Thread(target=loop1)
thread2 = threading.Thread(target=loop2)

thread1.start()
thread2.start()

thread1.join()
thread2.join()