DCA6109 PYTHON PROGRAMMING

Description

Python Programming

 

 

1. a) Explain the importance of exception handling in developing reliable Python applications. Demonstrate how multiple exceptions can be handled within a program using an appropriate example. b) Discuss the different file modes used in Python for reading, writing, appending, and updating files, with suitable examples. (5+5 Marks)

Ans 1.

Introduction

Sometimes, a Python program runs into these kind of unexpected scenarios that include invalid operations, missing files or wrong input. Two basic programming skills that are used to create applications that act reliably when things go wrong are exception handling and file handling.

Exception Handling is used to handle the exceptions.

Exception handling is a way to prevent a program from crashing abruptly when it encounters an error at runtime and instead handle the error. This prevents the application from becoming unstable and provides a normal message to the user rather than an ugly error trace. It also facilitates segregating the normal

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2. a) Differentiate between implicit and explicit type conversion in Python. Explain how each affects data processing and program execution with suitable examples. b) Explain membership and identity operators in Python. Differentiate between them with suitable examples. (5+5 Marks)

Ans 2.

Python is flexible with data types, and also offers special operators to test for membership and identity of objects. Learning type conversion and these operators would help a programmer to write correct and predictable code.

Type Conversion – Implicit and Explicit

Implicit type conversion is the automatic conversion of one type into another type when an operation is performed between them, without the programmer’s code. This typically occurs when a small

 

 

3. a) Explain the role of lists as mutable data structures in Python. Compare the working of insert(), append(), and extend() methods with suitable examples, and identify situations where each method is most appropriate. b) Explain the role of view functions in a Flask web application. Differentiate between static and dynamic routes and illustrate their implementation with suitable examples. (5+5 Marks)

Ans 3.

Introduction

Lists are used for a lot of tasks in python because data can be modified in them once they’ve been created. As a lightweight web framework, Flask determines the behavior of a web application based on the request based on the function to be called and the route set.

Lists are Mutable Data Structures

The reason a list in Python is termed as mutable is that the elements of a list can be altered, added or deleted without creating a new object in memory, after the list is created. This is unlike immutable

 

4. a) How are arguments different from parameters? Explain keyword arguments and variable-length arguments in detail. b) Explain importance of regular expression in Text processing. Discuss different quantifiers with examples. (5+5 Marks)

Ans 4.

Python functions are parameterized and arguments determine the flow of data into a function. Regular expressions are also a powerful tool for searching and processing text according to regular patterns.

Arguments versus Parameters

A parameter is a variable that appears in the parentheses of the function definition, and can be given the value to be substituted later. When a function is called, an argument is the actual value passed to the function. To put it simply, Parameters are part of the function’s definition, and Arguments are part of the function’s call. Keyword arguments are used to pass arguments to a function by the parameter name; the order in which they are written is not important. Star and double star symbols can be used to pass a

 

5. a) Discuss the role of game loops and event handling in game development. b) Explain the steps for establishing a database connection in Python. Discuss the role of SAVEPOINT in handling partial transaction failures with a suitable example. (5+5 Marks)

Ans 5.

There are two vastly different fields, game development and database handling, and both fields require continuous well structured processes in python. Game loops provide a smooth running game and database connections provide safe data storage and manipulation for a program.

Handling game loops and events

The game loop is the most essential component of a game program that is constantly repeated while the game is

 

 

6. a) Describe the role of the Pandas library in data preprocessing. Discuss the data preprocessing steps in detail. b) Explain the concepts of Continuous Integration and Continuous Deployment/Delivery (CI/CD) in the context of Python application development. Discuss how a CI/CD pipeline can support automated testing, code-quality checks, and application deployment. (5+5 Marks)

Ans 6.

In many cases, modern Python programming includes tasks such as getting raw data ready for analysis and deploying and testing applications automatically. The first task can be achieved using the Pandas library, and the second task can be achieved using CI/CD pipelines.

Concept and Application

Pandas is used for data preprocessing in various ways.

Pandas is a