diff --git a/README.md b/README.md
index b20c87d..194e955 100644
--- a/README.md
+++ b/README.md
@@ -1,17 +1,19 @@
+
:information_source: This repo contains questions and exercises to learn and practice Python
:bar_chart: There are currently **231** exercises and questions
+- [Free App for Learning Python](#free-app-for-learning-python)
- [Exercises](#exercises)
- [Hello World](#hello-world)
- - [Objects & Data Types](#objects--data-types)
+ - [Objects \& Data Types](#objects--data-types)
- [Variables](#variables)
- [Booleans](#booleans)
- [Strings](#strings)
- [Numbers](#numbers)
- - [Lists & Tuples](#lists--tuples)
+ - [Lists \& Tuples](#lists--tuples)
- [Dictionaries](#dictionaries)
- [Loops](#loops)
- [Functions](#functions)
@@ -26,12 +28,41 @@
- [Improve the Code](#improve-the-code)
- [Type Hinting](#type-hinting)
- [Misc](#misc)
+ - [Lambda](#lambda)
- [Questions](#questions)
- [Hello World](#hello-world-1)
+ - [Conditionals](#conditionals)
+ - [Loops](#loops-1)
- [Classes](#classes-1)
- [Strings](#strings-1)
- [Lists](#lists)
-
+ - [Python - OOP](#python---oop)
+ - [Python - Exceptions](#python---exceptions)
+ - [Python Built-in functions](#python-built-in-functions)
+ - [Properties](#properties)
+ - [Python - Lists](#python---lists)
+ - [Python - Dictionaries](#python---dictionaries)
+ - [Common Algorithms Implementation](#common-algorithms-implementation)
+ - [Python Files](#python-files)
+ - [Python OS](#python-os)
+ - [Python Regex](#python-regex)
+ - [Python Strings](#python-strings)
+ - [Python Iterators](#python-iterators)
+ - [Python Misc](#python-misc)
+ - [Python - Slicing](#python---slicing)
+ - [Python Debugging](#python-debugging)
+ - [Python - Linked List](#python---linked-list)
+ - [Python - Stack](#python---stack)
+ - [Python Testing](#python-testing)
+ - [Flask](#flask)
+
+# Free App for Learning Python
+
+
+
+ 
+
+
# Exercises
@@ -1613,333 +1644,4 @@ def home():
return 'main website'
app.add_url_rule('/', view_func=home)
-```
-
-
-
-
-What is a blueprint in Flask?
-
-
-
-What is a template?
-
-
-#### zip
-
-
-Given x = [1, 2, 3], what is the result of list(zip(x))?
-
-```
-[(1,), (2,), (3,)]
-```
-
-
-
-What is the result of each of the following:
-
-```
-list(zip(range(5), range(50), range(50)))
-list(zip(range(5), range(50), range(-2)))
-```
-
-
-```
-[(0, 0, 0), (1, 1, 1), (2, 2, 2), (3, 3, 3), (4, 4, 4)]
-[]
-```
-
-
-#### Python Descriptors
-
-
-Explain Descriptors
-
-Read about descriptors [here](https://docs.python.org/3/howto/descriptor.html)
-
-
-
-What would be the result of running a.num2 assuming the following code
-
-```
-class B:
- def __get__(self, obj, objtype=None):
- reuturn 10
-
-class A:
- num1 = 2
- num2 = Five()
-```
-
-10
-
-
-
-What would be the result of running some_car = Car("Red", 4) assuming the following code
-
-```
-class Print:
-
- def __get__(self, obj, objtype=None):
- value = obj._color
- print("Color was set to {}".format(valie))
- return value
-
- def __set__(self, obj, value):
- print("The color of the car is {}".format(value))
- obj._color = value
-
-class Car:
-
- color = Print()
-
- def __ini__(self, color, age):
- self.color = color
- self.age = age
-```
-
-An instance of Car class will be created and the following will be printed: "The color of the car is Red"
-
-
-#### Python Misc
-
-
-How can you spawn multiple processes with Python?
-
-
-
-Implement simple calculator for two numbers
-
-```
-def add(num1, num2):
- return num1 + num2
-
-
-def sub(num1, num2):
- return num1 - num2
-
-
-def mul(num1, num2):
- return num1*num2
-
-
-def div(num1, num2):
- return num1 / num2
-
-operators = {
- '+': add,
- '-': sub,
- '*': mul,
- '/': div
-}
-
-if __name__ == '__main__':
- operator = str(input("Operator: "))
- num1 = int(input("1st number: "))
- num2 = int(input("2nd number: "))
- print(operators[operator](num1, num2))
-```
-
-
-
-What data types are you familiar with that are not Python built-in types but still provided by modules which are part of the standard library?
-
-This is a good reference https://docs.python.org/3/library/datatypes.html
-
-
-
-Explain what is a decorator
-
-In python, everything is an object, even functions themselves. Therefore you could pass functions as arguments
-for another function eg;
-
-```
-def wee(word):
- return word
-
-def oh(f):
- return f + "Ohh"
-
->>> oh(wee("Wee"))
-<<< Wee Ohh
-```
-
-This allows us to control the before execution of any given function and if we added another function as wrapper,
-(a function receiving another function that receives a function as parameter) we could also control the after execution.
-
-Sometimes we want to control the before-after execution of many functions and it would get tedious to write
-
- f = function(function_1())
- f = function(function_1(function_2(*args)))
-
-every time, that's what decorators do, they introduce syntax to write all of this on the go, using the keyword '@'.
-
-
-
-
-Can you show how to write and use decorators?
-
-
-These two decorators (ntimes and timer) are usually used to display decorators functionalities, you can find them in lots of
-tutorials/reviews. I first saw these examples two years ago in pyData 2017. https://www.youtube.com/watch?v=7lmCu8wz8ro&t=3731s
-
-```
-Simple decorator:
-
-def deco(f):
- print(f"Hi I am the {f.__name__}() function!")
- return f
-
-@deco
-def hello_world():
- return "Hi, I'm in!"
-
-a = hello_world()
-print(a)
-
->>> Hi I am the hello_world() function!
- Hi, I'm in!
-```
-
-This is the simplest decorator version, it basically saves us from writting a = deco(hello_world()).
-But at this point we can only control the before execution, let's take on the after:
-
-```
-def deco(f):
- def wrapper(*args, **kwargs):
- print("Rick Sanchez!")
- func = f(*args, **kwargs)
- print("I'm in!")
- return func
- return wrapper
-
-@deco
-def f(word):
- print(word)
-
-a = f("************")
->>> Rick Sanchez!
- ************
- I'm in!
-```
-
-deco receives a function -> f
-wrapper receives the arguments -> *args, **kwargs
-
-wrapper returns the function plus the arguments -> f(*args, **kwargs)
-deco returns wrapper.
-
-As you can see we conveniently do things before and after the execution of a given function.
-
-For example, we could write a decorator that calculates the execution time of a function.
-
-```
-import time
-def deco(f):
- def wrapper(*args, **kwargs):
- before = time.time()
- func = f(*args, **kwargs)
- after = time.time()
- print(after-before)
- return func
- return wrapper
-
-@deco
-def f():
- time.sleep(2)
- print("************")
-
-a = f()
->>> 2.0008859634399414
-```
-
-Or create a decorator that executes a function n times.
-
-```
-def n_times(n):
- def wrapper(f):
- def inner(*args, **kwargs):
- for _ in range(n):
- func = f(*args, **kwargs)
- return func
- return inner
- return wrapper
-
-@n_times(4)
-def f():
- print("************")
-
-a = f()
-
->>>************
- ************
- ************
- ************
-```
-
-
-
-
-Write a decorator that calculates the execution time of a function
-
-
-
-Write a script which will determine if a given host is accessible on a given port
-
-
-
-Are you familiar with Dataclasses? Can you explain what are they used for?
-
-
-
-You wrote a class to represent a car. How would you compare two cars instances if two cars are equal if they have the same model and color?
-
-```
-class Car:
- def __init__(self, model, color):
- self.model = model
- self.color = color
-
- def __eq__(self, other):
- if not isinstance(other, Car):
- return NotImplemented
- return self.model == other.model and self.color == other.color
-
->> a = Car('model_1', 'red')
->> b = Car('model_2', 'green')
->> c = Car('model_1', 'red')
->> a == b
-False
->> a == c
-True
-```
-
-
-
-Explain Context Manager
-
-
-
-Tell me everything you know about concurrency in Python
-
-
-
-Explain the Buffer Protocol
-
-
-
-Do you have experience with web scraping? Can you describe what have you used and for what?
-
-
-
-Can you implement Linux's tail command in Python? Bonus: implement head as well
-
-
-
-You have created a web page where a user can upload a document. But the function which reads the uploaded files, runs for a long time, based on the document size and user has to wait for the read operation to complete before he/she can continue using the web site. How can you overcome this?
-
-
-
-How yield works exactly?
-
-
+```
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