June 2023

The array object in NumPy is called ndarray. We can create a NumPy ndarray object by using the array() function. We can pass a list, tuple or any array-like object into the array() method, and it will be converted into an ndarray. type(): It is a built-in Python function which returns the type of the object passed to…

NumPy Installation- If Python and PIP is already installed on a system, then installation of NumPy can be done by using following command In case if the above mentioned command fails, then use a python distribution that already has NumPy installed like, Anaconda, Spyder etc. NumPy Importing- To import NumPy in our application code use…

NumPy stands for “Numerical Python. NumPy is a open source Python library. NumPy is used for working with arrays. NumPy was created in 2005 by Travis Oliphant. NumPy is written partially in Python, but most of the parts that require fast computation are written in C or C++. NumPy has functions for working in domain…

We can create, read, update and delete files in python. How to open file in python? File Opening in Python- open() method is used to open the file in the python. It has 2 Parameters – filename and mode. There are four different methods (modes) for opening a file: “r” – Read – Default value.…

STRING FORMATTING format() method in python is used to format the selected parts of a string by placing the curly braces {} as placeholder on the selected part of string, which we want to get filled by values provided from user input or database, and running the values through format() method. Example- Add a placeholder/{}…

User Input in Python using input() method- The following example asks for the username, and when you entered the username, it gets printed on the screen. Python stops executing when it comes to the input() function, and continues when the user has given some input.

TRY and EXCEPT block is used in the code for the exception handling. Exception Handling Whenever an error or exception occur in our code while executing, the Python will normally stop and generate an error message. These exceptions can be handled using the try statement. The try block is used for testing a block of…

PIP is a package manager for python packages or modules, it is used to install the additional libraries and packages that are not part of the standard Python library. How to install pip? pip comes pre-installed on the Python versions 3.4 or older. We can check if pip is installed by using the following command…

RegEx in Python RegEx stands for Regular Expression. It is a sequence of characters that form a search pattern. RegEx or search pattern can be used to check if a string contains the specified search pattern. Python has a built in package or module called re which can be imported in python code to work…

JSON- Stands for Java Script Object Notation, JSON is an open standard text based data interchange format which is easy for machines to parse and generate. JSON in python Python has a built in package called json. json module can be imported in python to work with json data as shown below. To Convert data…

Python Datetime Module Python Datetime Module in Python provides us the different features to work with dates as date object by importing the datetime module. Current Date Python code to import the datetime module to access current date output (Note-it will show the current date and time, at the time of execution of code on your machine)…

PYTHON POLYMORPHISM Polymorphism is one of the OOP(object-oriented programming) concepts. Polymorphism in Python is the ability of an object to take many forms. The word “polymorphism” means “many forms”, and in programming, it refers to methods/functions/operators with the same name that can be executed on many objects or classes. Function Polymorphism in Python In Python…

PYTHON MODULE Module is a file or library of codes or set of methods, that can be included in our Application. HOW TO CREATE A MODULE? Creating Module- Module can be created by saving the code in a file with the file extension .py. Python Code- Save below code in file named mymodule.py Using Module-…

PYTHON ITERATORS An Iterator is an object that contains a countable no. of values or elements that can be traversed. An iterator allows a programmer to traverse through all the elements of a collection or iterable objects. An iterator is an object which implements the iterator protocol, which consist of the methods __iter__() and __next__(). WHAT…

PYTHON INHERITANCE Inheritance is a mechanism of object-oriented programming for deriving new classes (sub classes) from existing ones such as super class or base class. It allows us to define a class that inherits all the methods and properties from another class. Parent class or base class, is the class being inherited from. Child class…

PYTHON CONSTRUCTOR- A constructor is a special type of method or function that is used to initialize the instance members of the class. Constructor definition is automatically executed when we create the object of the class. Constructors also verify that there are enough resources for the object to perform any start-up task. The _init_() method simulates…