Iterators in python

Iterator is a python object which can be iterated upon. Python lists, tuples, dictionaries and sets are all examples of built-in iterators. Python iterator object must implement two methods, __iter__() and __next__() .

1. __iter__ : method that is called…

Tuples and Set in Python

Tuples are very similar to lists, however, unlike lists they are immutable meaning they cannot be changed.

A tuple consists of a number of values separated by commas,

# Create a tuple
>>> t = (1,2,'math')
>>> t
(1,2,'math')

Errors and Exception handling in Python

If you are writing a program and if there is any type of error in the code, program execution stops. Can we let program to continue its execution even if error occurred ? Answer is Yes, we can and for that we use error and exception handling.

Object Oriented Programming in Python Part-2

In this chapter, we will discuss following topics:

• Inheritance
• Encapsulation
• Polymorphism

Inheritance

__name__ and __main__ in Python

We often use if __name__ == “__main__”: in python programming. So,what does it mean ?

Let’s consider a file name sample.py . Command to run a python script is:

python sample.py

Lambda Expressions

To learn Lambda Expression, first we will look into built in functions, Map and Filter.

Map Function

Map function maps your function to an iterable object. Let’s see an quick example where we are calculating the square of each element of an…

Scope of Variables in Python

Scope is a visibility which determines whether the variable is accessed by other parts of a code or not. Let’s see an example:

num = 5

def func(x):
    num=3
    return num

print(num)
print(func(num))

Python Statements(Control Flow)

In python, colon and indentation is used in control flow syntax. Indentation is very crucial in python. Let’s have look on various python statements:

if statements

Decorators in Python

Decorator modifies the functionality of another function.

Now, suppose you want to add more functionality to a function, what you will do ?

You will add more coding and will modify the old code and return something or you can create a new…

Files in Python

File is an object used by Python to interact with the external files stored on your computer. These file objects can be any type of file you have on your computer, whether it be an audio file, a text file, emails, Excel documents, etc.