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Class 12 – Computer Science : Python Revision Tour – I [A] – Basics of Python Topics are : INTRODUCTION A python is an object-oriented, interpreted, high-level language and a very powerful programming language. Developed by Guido Van Rossum in 1991. INSTALLATION Download it from www.python.org and install your computer by clicking on the installation …
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Class 12 Computer Science Python Revision Tour – II Notes String/Text Handling in Python What is a String? Python strings are characters enclosed in quotes of any type – single quotation marks, double quotation marks, triple quotation marks. An Empty string is a string that has 0 characters, i.e. ‘ ’ , “ ”, “““ …
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Working with Functions in Python (A Complete Notes) Functions – Introduction Why do we need Functions? It is easy to work with small problems because its solution is also small. When the problem becomes complex, the size and complexity of the program also increased, and it becomes difficult and cumbersome for a programmer to manage …
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In Python, exceptions are errors that get triggered automatically. However, exceptions can be forcefully triggered and handled through program code. These occur when there are syntax errors, runtime errors or logical errors in the code.
Using Python Libraries – Notes Using Python libraries: create and import Python libraries. Using libraries: Mathematical, Random, String and Datetime. What is Library? Library refers to the collection of related module(s), which works together to fulfil specific requirements or help us in making any application. The library contains built-in modules (written in C) that provide …
A file is a named location on a secondary storage media where data are permanently stored for later access. A text file contains only textual information consisting of alphabets, numbers and other special symbols. Such files are stored with extensions like .txt, .py, .c, .csv, .html, etc. Each byte of a text file represents a …
Data Structure – A Linear List Notes What is Data Structure? A Data Structure is a named group of data of different data types which is stored in a specific way and can be processed as a single unit. A data structure has well-defined operations, behavior and properties. Data Types vs. Data Structure Data Types …
Python Data Structure Stacks Notes & Important Points Introduction: A data structure is a group of data that have different data types which can be accessed as a unit. It has well-defined operations, properties and behaviours. Data structure is a way of storing and organising information in the computer. General data structure types include array, …
Queue is an ordered linear data structure, following FIFO strategy. Front and Rear are used to indicate beginning and end of queue. In Python, the use of predefined methods takes care of Front and Rear. Insertion in a queue happens at the rear end. Deletion happens at the front. Insertion operation is known as enqueue …
The process of placing or rearranging a collection of elements into a particular order is known as sorting. Bubble sort is the simplest sorting algorithm that works by repeatedly swapping the adjacent elements in case they are unordered in n-1 passes. In Selection Sort, the smallest element is selected from the unsorted array and swapped …
Computer Networks Notes and Important Points A computer network is an interconnection among two or more computers or computing devices. A computer network allows computers to share data and resources among each other. Networking devices are used to connect multiple computers in different settings. In a communication network, each device that is a part of …
Data Communication Notes and Important Points • Data communication refers to the exchange of data between two or more networked or connected devices like laptops, PC, printers, routers etc.• Sender, receiver, messages, channel and protocols are major components of data communication.• In data communication, transmission media are the links that carry messages between two or …
Network Security Aspects Notes & Important Points • Malware is a software developed with an intention to damage computer hardware, software, steal data, or cause any other trouble to a user. • A virus is a piece of software code created to perform malicious activities and hamper resources of a computer system. • The Worm …
Relational Databases – Notes & Important Points • A file in a file system is a container to store data in a computer. • File system suffers from Data Redundancy, Data Inconsistency, Data Isolation, Data Dependence and Controlled Data sharing. • Database Management System (DBMS) is a software to create and manage databases. A database …
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SQL Functions – Single Row and Aggregate Group By , Having clause Joins in SQL Functions in SQL Function is used to perform some particular task and it returns zero or more values as a result. Functions can be applied to work on single or multiple records (rows) of a table. Depending on their application …
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Real world application needs to manipulate data stored in the database through an application designed, by using any programming language like Python, Java, etc. vIn order to connect to a database from within Python or any other programming language, we need a Driver or Connector library or Interface. vIn case of Python we can use …
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