S6:-Object-Oriented-Programming.md

@@ -147,7 +147,7 @@ class Seq:
     pass
 ```
 
-When the class is defined, we can **create objects** of this class as shown here:
+When the class is defined, we can **create objects** of that class as shown below:
 
 ```python
 # Main program
@@ -158,7 +158,7 @@ s1 = Seq()
 s2 = Seq()
 ```
 
-Let's place a **breakpoint** in the line 7
+Let's place a **breakpoint** in  line 7
 
 ![](https://github.com/myTeachingURJC/2019-2020-PNE/raw/master/s6-OOP/oop-01.png) 
 
@@ -166,7 +166,7 @@ Press the **step over** option twice. On the variable panel we will see the **tw
 
 ![](https://github.com/myTeachingURJC/2019-2020-PNE/raw/master/s6-OOP/oop-02.png)
 
-Contrats! You have created your first two **empty objects**!
+Congrats! You have created your first two **empty objects**!
 
 ### The \_\_init\_\_ method
 
@@ -200,9 +200,9 @@ Testing....
 
 ### Adding data: attribute strbases
 
-For representing a **sequence** we will use a **string** that is store in every object. We will call this string as **strbases**. The data stored in the objects is referred as **attributes**
+For representing a **sequence** we will use a **string** that will be stored in every object. We will call this string **strbases**. Data stored in the objects are referred as **attributes**
 
-We modify the \_\_init\_\_ method to include a new parameter: the string for creating the object. That parameter will be stored in the object attribute: **self.strbases**
+Let's modify the \_\_init\_\_ method to include a new parameter: the string for creating the object. That parameter will be stored in the object attribute: **self.strbases**
 
 ```python
 class Seq:
@@ -220,7 +220,7 @@ class Seq:
 s1 = Seq("AGTACACTGGT")
 s2 = Seq("CGTAAC")
 ```
-If you **execute** it, you will see the **same output** than before. But now something has happened. The two objects created have their own **sequence string** stored in the **strbases** attribute. Let's debug it to see it
+If you **execute** it, you will see the **same output** as before, but now something has happened. The two objects created have their own **sequence string** stored in the **strbases** attribute. Let's debug it to see it
 
 ![](https://github.com/myTeachingURJC/2019-2020-PNE/raw/master/s6-OOP/oop-03.png)
 
@@ -268,7 +268,7 @@ Sequence 2: CGTAAC
 Testing....
 ```
 
-In **debug mode**, if the **step into** option is pressed when the next instruction to be executed is the first print, you will see how the execution pointer moved into the **\_\_str\_\_ method**
+In the **debug mode**, if the **step into** option is pressed when the next instruction to be executed is the first print, you will see how the execution pointer moved into the **\_\_str\_\_ method**
 
 ###  Adding methods: len()
 
@@ -323,7 +323,7 @@ Sequence 2: CGTAAC
 
 ### Inheritance
 
-New classes can be **derived** from others, reusing their methods and adding new ones. This is called **inheritance**. Just to present the concepts, Let's create the **Gene class** derived from the Sequence. It will not add anything
+New classes can be **derived** from others, reusing their methods and adding new ones. This is called **inheritance**. Just to present the concepts, Let's create the **Gene class**, that derives (inherits) from Seq. It will not add anything
 
 ```python3
 class Gene(Seq):
@@ -348,7 +348,7 @@ print(f"Gene: {g}")
 print(f"  Length: {g.len()}")
 ```
 
-If we **run** the program this is what is shown in the **console**:
+If we **run** the program this is what we get:
 
 ```
 New sequence created!
@@ -361,7 +361,7 @@ Gene: CGTAAC
 
 #### Expanding the Gene Class
 
-The **Gene** is a kind of **specialized sequence**. Not all the sequences are Genes, but all the genes are sequences. We can **expand** the **Gene class** by adding more information that is not present in the general sequences. For example the **name**: usually the genes have a special name
+The **Gene** is a kind of **specialized sequence**. Not all the sequences are Genes, but all the genes are sequences. We can **expand** the **Gene class** by adding more information that is not present in the general sequences. For example the **name** (usually the genes have a special name)
 
 Let's create a new \_\_init\_\_ file method that includes a new optional parameter: the name of the Gene
 
@@ -380,7 +380,7 @@ class Gene(Seq):
         print("New gene created")
 ```
 
-As the Gene is also a Seq, for creating a Gene first we should call the **init** function from the **Seq class**. We do it by calling the **super().__init__(strbases)** method. And then we add the properties of the Gene. In this case its name
+As the Gene is also a Seq, for creating a Gene first we should call the **init** function from the Seq class. We do it by calling the **super().__init__(strbases)** method, and then we add the properties of the Gene. In this case, only its name
 
 When creating the Gene in the main program, we specify its **name** as a parameter, for example FRAT1:
 
@@ -394,7 +394,7 @@ print(f"Sequence 1: {s1}")
 print(f"Gene: {g}")
 ```
 
-When the program is **executed**, we can see this on the **Console**:
+When the program is **executed**, this is what we get:
 
 ```
 New sequence created!
@@ -404,11 +404,11 @@ Sequence 1: AGTACACTGGT
 Gene: CGTAAC
 ```
 
-Notice how the **init function** from the **Seq** has been **called twice**. The init function from the Gene only **once**
+Notice how the **init** function from Seq has been **called twice**, and the init function from the Gene only **once**
 
 #### Overriding the Seq methods
 
-In the new **Gene class**, we can create **new methods**, or we can **re-implement** method that were already implemeted in the Seq class. This operation of re-implementation is called overriding. For example, let's change the \_\_str\_\_ method for **printing** the **Gene name** along with the sequence
+In the new Gene class, we can create **new methods**, or we can **re-implement** methods that were already implemented in the *mother/father* class (Seq in this case). This operation of re-implementation is called **overriding**. For example, let's change the \_\_str\_\_ method for **printing** the **Gene name** along with the sequence
 
 ```python3
 class Gene(Seq):
@@ -441,8 +441,7 @@ print(f"Sequence 1: {s1}")
 print(f"Gene: {g}")
 ```
 
-This is the result of the **execution**. We can see how the Gene object is printed diferently:
-
+This is the result of the **execution**:
 ```
 New sequence created!
 New sequence created!
@@ -458,12 +457,12 @@ On the other hand, if you have a look at the \_\_str\_\_ method in the **Seq Cla
 
 ![](https://github.com/myTeachingURJC/2019-2020-PNE/raw/master/s6-OOP/oop-05.png)
 
-This means that there is a **sub-clas**s that is overriding this methods, as we already know. And that the Seq \_\_str\_\_ method is also overriding another one from its **super class** 
+This means that there is a **sub-class** that is overriding this method. And that the Seq \_\_str\_\_ method is also overriding another one from its **super class** (generic)
 
 
 ## Installing libraries: termcolor
 
-There are many **python libraries** available for you to use. You only have to **install** them. As an example of how to do it, let's install the [termcolor](https://pypi.org/project/termcolor/) library. It will allow us to **print messages in color** on the **console** 
+There are many **python libraries** available for you to use. You only have to **install** them. As an example of how to do it, let's install the [termcolor](https://pypi.org/project/termcolor/) library. It will allow us to **print messages in color** in the **console** 
 
 Create a **new python file** in the **Session-06** folder and call it **test-color-py**. Write this code:
 
@@ -473,7 +472,7 @@ import termcolor
 termcolor.cprint("Hey! this is printed in green!", 'green')
 ```
 
- You will see that the word **termcolor** is underlined in **red**. This is because Pycharm does not know anything about the termcolor module. 
+You will see that the word **termcolor** is underlined in **red**. This is because Pycharm does not know anything about the termcolor module. 
 
 ![](https://github.com/myTeachingURJC/2019-2020-PNE/raw/master/s6-OOP/libraries-02.png)
 
@@ -481,13 +480,13 @@ Place the **mouse pointer** on termcolor and a **new window** will pop up:
 
 ![](https://github.com/myTeachingURJC/2019-2020-PNE/raw/master/s6-OOP/libraries-01.png)
 
-Click on the **install package termcolor** option. The package start the installation. After some seconds it is ready and the termcolor is no longer in red
+Click on the **install package termcolor** option. The package start the installation. After some seconds it will be ready so the termcolor word will be no longer in red
 
-Now **run** the program. You will see a green message on the console
+Now **run** the program. You will see a green message:
 
 ![](https://github.com/myTeachingURJC/2019-2020-PNE/raw/master/s6-OOP/libraries-03.png)
 
-You now have the power of printing in colors in the console. Use it wisely...
+You now have the power of printing in colors...use it wisely :)
 
 ## Exercises