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Added 1st, 2nd lessons
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‎README.md

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# Order
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1. Hello World! Introduction to Python. Variables and operators: numbers, strings, boolean type.
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hello_world.py, vars.py, boolean.py, types.py
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2. Conditional statements: if-elif-else, ternary operator. While loop.
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conditional_if.py, conditional_elif.py, while.py
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3. Lists. List operations.
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lists.py
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4. For loop. More lists. List comprehensions.
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for.py, more_lists.py, list_generators.py
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5. Dictionaries. Sets. Tuples.
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dicts_sets_tuples.py
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6. Functions. Lambdas. Decorators.
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functions.py
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7. Exceptions. Files. Context manager.
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exceptions.py, files.py
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8. Modules. Packages.
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modularity.py
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9. PEP 8 - code style. PEP 257 - documentation.
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Guido.md
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10. OOP basics in Python: classes.
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classes.py
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11. Abstraction. OOP principles: encapsulation, inheritance, polymorphism.
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encapsulation.py, inheritance.py, polymorphism.py
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12. Module abc. Static variables, methods. Properties.
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abstract.py, static.py, properties.py
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13. Python standard library: os, sys, re, math, random, datetime, timeit, doctest, unittest.
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oslib.py, syslib.py, relib.py, mathlib.py, randomlib.py, datetimelib.py, timeitlib.py, doctestlib.py, unittestlib.py
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14. PIP. Anaconda. Introduction to numpy, pandas, requests, bs4, flask.
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numpylib.py, pandaslib.py, requestslib.py, bs4lib.py, flaskr/start.sh
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15. Concurrency. GIL - Global Interpreter Lock. Modules threading and multiprocessing.
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threadinglib.py, prodcons.py, asynciolib.py, multiprocessinglib.py
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16. NLTK, Keras, scikit-learn. Introduction to Big Data.

‎boolean.py

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# Запустить это - python boolean.py
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apples = 2
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bananas = 4
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print("Apples:", apples)
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print("Bananas:", bananas)
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# Считаем количество фруктов
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fruits = apples + bananas
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print("Fruits:", fruits)
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# Фруктов больше 5?
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is_greater_than_five = (fruits > 5)
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print("Is greater than 5:", is_greater_than_five)
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# Фруктов больше 8?
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is_greater_than_eight = (fruits > 8)
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print("Is greater than 8:", is_greater_than_eight)
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# Boolean = True или False (истина или ложь, да или нет)
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# Остальные операции над boolean
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x = 2
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y = 5
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print("x:", x)
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print("y:", y)
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print("x < 2", x < 2)
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print("x <= 2", x <= 2)
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print("y > 5", y > 5)
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print("y >= 5", y >= 5)
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print("x == 2", x == 2)
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print("y != 6", y != 6)
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# Операция AND
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my_name = "Alex"
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my_age = 21
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print("Me:", my_name, my_age)
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name = "Max"
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age = 24
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print("Someone:", name, age)
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is_me = name == my_name and age == my_age
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print("Is it me:", is_me)
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# X and Y = RESULT
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# T and T T
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# T and F F
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# F and T F
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# F and F F
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# Операция OR
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color = "red"
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print("Color:", color)
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is_blue_or_red = color == "blue" or color == "red"
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print("Is blue or red:", is_blue_or_red)
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# X or Y = RESULT
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# T or T = T
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# T or F = T
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# F or T = T
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# F or F = F
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# Операция NOT
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true_value = True
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false_value = not true_value
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print("True value:", true_value)
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print("False value:", false_value)
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# not X = RESULT
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# not T = F
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# not F = T

‎conditional_elif.py

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# Запустить это - python conditional_elif.py
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# Оценка от 0 до 100 за тест
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mark = int(input('Please enter your mark: '))
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# Условный переход
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if mark < 0: # условие №1
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print("Something is wrong. Must be higher than 0!") # если условие №1 истинно
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elif mark < 25: # условие №2
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print("It's a bad attempt. Try again!") # если условие №2 истинно
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elif mark >= 25 and mark < 50: # условие №3
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print("You can be better. Once again!") # если условие №3 истинно
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elif mark >= 50 and mark < 75: # условие №4
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print("Good enough. Maybe once again?") # если условие №4 истинно
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elif mark >= 75 and mark <= 100: # условие №5
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print("Good job! You are the best!") # если условие №5 истинно
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else:
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print("Something is wrong. Must be lower than 100!") # если никуда раньше не зашли
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is_wrong = mark < 0 or mark > 100
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is_bad = mark < 25
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can_be_better = mark >= 25 and mark < 50
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is_good_enough = mark >= 50 and mark < 75
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is_good_job = mark >= 75 and mark <= 100
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if is_wrong:
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print("Something is wrong. Must be higher than 0!")
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elif is_bad:
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print("It's a bad attempt. Try again!")
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elif can_be_better:
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print("You can be better. Once again!")
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elif is_good_enough:
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print("Good enough. Maybe once again?")
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elif is_good_job:
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print("Good job! You are the best!")

‎conditional_if.py

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# Запустить это - python conditional_if.py
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right_name = "Alex"
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right_password = "12345678"
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name = input("Please enter the name: ")
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password = input("Please enter the password: ")
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access_granted = "ACCESS GRANTED! You are in!"
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access_denied = "ACCESS DENIED! Wrong name or password!"
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# Условный переход
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if name == right_name and password == right_password: # условие
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print(access_granted) # если условие истинно
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print('123')
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print(123)
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else:
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print(access_denied) # если условие ложно
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'''
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Это
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многострочный
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комментарий
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is_alex = name == right_name
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is_password_right = password == right_password
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can_login = is_alex and is_password_right
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if can_login:
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print(access_granted)
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else:
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print(access_denied)
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print(access_granted if can_login else access_denied)
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'''

‎exercises/99bottles.py

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'''
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99 bottles of beer on the wall, 99 bottles of beer.
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Take one down and pass it around, 98 bottles of beer on the wall.
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...
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1 bottle of beer on the wall, 1 bottle of beer.
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Take one down and pass it around, no more bottles of beer on the wall.
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No more bottles of beer on the wall, no more bottles of beer.
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Go to the store and buy some more, 99 bottles of beer on the wall.
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'''
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bottles = 99
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while bottles >= 0:
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if bottles == 1:
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print('1 bottle of beer on the wall, 1 bottle of beer.')
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print('Take one down and pass it around, no more bottles of beer on the wall.')
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elif bottles == 0:
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print('No more bottles of beer on the wall, no more bottles of beer.')
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print('Go to the store and buy some more, 99 bottles of beer on the wall.')
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else:
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bottle_string = str(bottles - 1) + (' bottles' if (bottles - 1) > 1 else ' bottle')
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print(f'{bottles} bottles of beer on the wall, {bottles} bottles of beer.')
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print(f'Take one down and pass it around, {bottle_string} of beer on the wall.')
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bottles -= 1
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'''
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a = '{} bottles of beer'.format(bottles)
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b = '{ZZZ} bottles of beer'.format(ZZZ=bottles)
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c = f'{bottles} bottles of beer'
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print(a)
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print(b)
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print(c)
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'''
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‎exercises/lists.py

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'''
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Есть список с числами. Необходимо составить новый список, причем для каждого элемента этого списка вывести сумму двух его соседей.
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Для крайних элементов одним из соседей считается элемент с противоположного конца списка.
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Например:
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[1, 3, 5, 6, 10] -> [13, 6, 9, 15, 7]
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'''
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l = [1, 3, 5, 6, 10]
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a = []
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a.append(l[1] + l[-1])
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for index in range(1, len(l) - 1):
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a.append(l[index - 1] + l[index + 1])
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a.append(l[0] + l[-2])
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print(a)

‎exercises/seasons.py

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'''
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Переменная month содержит номер месяца
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Нужно вывести время года, которому принадлежит месяц
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'''
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month = int(input('Month: '))
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if month == 12 or 1 <= month <= 2:
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print('Winter')
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elif 3 <= month <= 5: # 3 <= month <= 5
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print('Spring')
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elif 6 <= month <= 8:
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print('Summer')
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elif 9 <= month <= 11:
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print('Autumn')
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else:
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print('Error')

‎exercises/sum_all_even.py

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'''
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Суммировать все четные числа от 0 до n
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'''
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n = int(input('Enter number: '))
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counter = 0
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accumulator = 0
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while counter != n:
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if counter % 2 == 0:
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accumulator += counter
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counter += 1 # counter = counter + 1
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print(accumulator)

‎exercises/tutor/lists.py

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'''
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Есть список с числами. Необходимо составить новый список, причем для каждого элемента этого списка вывести сумму двух его соседей. Для крайних элементов одним из соседей считается элемент с противоположного конца списка.
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Например:
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[1, 3, 5, 6, 10] -> [13, 6, 9, 15, 7]
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'''
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a = [1, 3, 5, 6, 10]
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b = []
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for index in range(len(a)):
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if index == 0:
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value = a[index + 1] + a[-1]
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elif index == len(a) - 1:
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value = a[index - 1] + a[0]
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else:
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value = a[index - 1] + a[index + 1]
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b.append(value)
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'''
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b = []
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for index in range(len(a)):
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previous_index = (index - 1)
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next_index = (index + 1) % len(a)
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value = a[previous_index] + a[next_index]
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b.append(value)
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'''
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print(b)

‎for.py

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# Запустить это - python for.py
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# Списки
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list_of_numbers = [1, 2, 3]
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list_of_strings = ["Hello", " ", "World", "!"]
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list_of_mixed_types = [1, "apple", 2, 4.5, False]
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# Вывести элементы списка
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print("Elements of list of mixed types:")
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for element in list_of_mixed_types:
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print(element)
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# Сложить все числа в списке
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print("Sum of all numbers in list of numbers:")
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accumulator = 0
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for element in list_of_numbers:
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accumulator += element
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print(accumulator)
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# Конкатенировать все строки в списке
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print("Concatenate all strings in list of strings:")
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accumulator = ""
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for element in list_of_strings:
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accumulator += element
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print(accumulator)
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# Как я говорил, строки = списки символов
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print("Letters:")
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for letter in "Alex":
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print(letter)

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