# Python for Machine Learning

As someone from a non-technical background, the word ‘Programming’ would itself be enough to send shivers down your spine! So, you must be thinking ‘Why should I even put in effort to learn Programming’?

Well programmers are in high demand all over the world and the median salary of a computer programmer is 100,000k\$ per annum. And with the advent of artificial intelligence and the threat of many jobs becoming automated, you don’t have to be scared at all, because it will be you who will help in automating tasks as a computer programmer! Also there are still many systems for the next several decades that still require human intelligence, coupled with the ability to write code that makes this a very secure job option.

Now, that we know the importance of programming, let’s understand what exactly it is!
To answer that, let me ask a question! How do humans communicate with each other? We humans use a common language to speak with each other, isn’t it?

Similarly, if we have to speak with a computer, we need to learn a language which the computer can understand! And this is where a programming language comes in.
So, simply put, we solve real world problems, by speaking with the computer in a language it actually understands.

Let’s take the example of a calculator!
When, you feed in ‘1234 * 4321’ in the calculator. It immediately shows you, the result is ‘5,332,114’. How was the calculator able to do this multiplication?
This was possible because you wrote in a simple program to multiply two numbers which the calculator can understand.

Now, let’s look at some salary statistics for people who are skilled in programming!
According to LinkedIn, the average salary of a computer programmer in the United States is 100,000\$ per annum and Rs.8,00,000 per annum in India. Well, this should be a good enough motivation for you to start learning programming!

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Programming languages deal with data. So, the question which arises over here is how do we actually store this data if we want to reuse it? Let’s you’re working with some data about employees of your organization and you’d have to store the names of employees, so how will you do that?

Well this is where variables come in. Variables are temporary storage spaces to store values.
Let’s say we create a variable called “employee_name”. Then we can go ahead and store the value “John” inside the variable. After some time, i can replace the value with “Sam”. Again after some time i’ll replace it with “Matt”.

Let’s see how can we create variables in python:
var1 = “Sam”
var1 = “Matt”
var1 = “John”
Since, variable is a temporary storage space, we can change the values which are stored in the variable “var1”.

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What are the basic math operators in Python?

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What are strings in Python?

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What is the best compiler for Python?

What does n do in Python?

What is the latest Python version?

Operators in Python as the name states help us to perform different types of operations on the data.

Arithmetic Operators:
Arithmetic operators help us to perform simple arithmetic operations such as addition, subtraction, multiplication and division.
a=10
b=20
a+b
a-b
a/b
a*b

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Compilers are programs that convert source code written in a high-level programming language to a lower-level programming language.

Here are the top 5 best compilers for Python:

• CPython: This compiler-cum-interpreter is the de-facto Python compiler as it belongs to the reference implementation of Python i.e. CPython

• Brython: Supports – Python 3 to 3.7

• Nuitka: Supports – Python 2.6, 2.7, 3.3 to 3.7

• PyJS: Supports – Up to Python 2.7

• Skulpt: Supports – Up to Python 3.3

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In Python strings, the backslash “” is a special character, also called the “escape” character. It is used in representing certain white space characters and “\n” is one of them. It is used to start a new line.

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Strings are sequence of characters enclosed within single quotes(‘ ’), double quotes(“ “) or triple quotes(‘’’ ‘’’) a = ‘Hello World’
b = “This is Sparta”
c = ‘’‘I am
going
to France
tomorrow
‘’’

Code Explanation:
Here we start off by creating a string variable called ‘my_string’ and assign the value “My name is John” to it. In a string, each individual character is at a particular index and the index value starts at 0.
So, if we have to extract the first character in the string ‘M’, then, we ‘d have to give this command:
my_string[0]
Since, indexing starts at 0, the index value of the first character ‘M’ will be 0.
We would have to give this command:
my_string[-1] to extract the last character from this string.

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How can I read a pkl file for visualising it using pandas?

Pickle files (.pkl) are used to store the serialized form of Python objects. This means objects like list, set, tuple, dict, etc. are converted to a character stream before being stored on the disk. This allows you to continue working with the objects later on. These are particularly useful when you have trained your machine learning model and want to save them to make predictions later on.

So, if you serialized the files before saving them, you need to de-serialize them before you use them in your Python programs. This is done using the pickle.load() function in the pickle module. But when you open the pickle file with Python’s open() function, you need to provide the ‘rb’ parameter to read the binary file.

``````import pickle

with open('./Importing files/sample_pickle.pkl','rb') as file:

# pickle data
print(type(data))

df_pkl = pd.DataFrame(data)
df_pkl

``````

Sir,
I have used pickle.load but not the aforementioned one. I tried to use it but got error message. It would be great if you could help me.
Thanking you,
Yours respectfully,
Indraayudh Talukdar

I just completed all the course material for Python for Machine Learning but then im not being able to access my qizz, which also donot allow to claim my certificate. Can somebody please help me.!

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Please check if you have watched all the videos completely (till the tick mark comes) in the course or not. The quiz will only unlock once you watches all the videos in the course.

Can anybody help me with knn?

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How to use not equal operator in python?

What do you mean by python scripting? What is a script and a module in python?