Python Programming
- 1. Welcome to the Python Programming Course
- 2. Introduction to Python • Python is a high level, interpreted, general purpose ,dynamic programming language. • Conceived in late 80s and its usage began in 1989. • It is a free and open software • Open source software: is a kind of software in which the source code of the software is made public. It is a community based development.
- 3. • Fewer lines of code when compared to C ,C++ and JAVA. • It Supports automatic memory management • Has large standard library • Can be used in any OS as the interpreter is available for many OS- platform indepedent • Can be used in Object oriented, Functional programming, Procedural programming • Reusability
- 4. Features of Python • The code written python is automatically compiled to byte code and executed. • Can be used as Scripting language • Uses Object oriented programming approach • Supports features like nested code blocks, functions, classes, modules and packages • Has built in data types like strings, lists, tuple, dictionaries • No type declaration • Python program can be extended
- 5. IDLE • IDLE (Integrated Development and Learning Environment) is an integrated development environment (IDE) for Python. • The Python installer for Windows contains the IDLE module by default. • IDLE is not available by default in Python distributions for Linux. It needs to be installed using the respective package managers.
- 6. • IDLE can be used to execute a single statement just like Python Shell and also to create, modify and execute Python scripts. • IDLE provides a fully-featured text editor to create Python scripts that includes features like syntax highlighting, autocompletion and smart indent. It also has a debugger with stepping and breakpoints features. • Anoconda jupyter notebook,spyder
- 7. Python - Shell (Interpreter) • Python is an interpreter language. It means it executes the code line by line. Python provides a Python Shell (also known as Python Interactive Shell) which is used to execute a single Python command and get the result. • Python Shell waits for the input command from the user. As soon as the user enters the command, it executes it and displays the result.
- 8. Comments • Comments are annotatations made by the programmer helping other programmers understand the code • Python uses the hash character(#) for comments • # is put before the text and hence will not be parsed by the interpreter. • No error message will be displayed • Does not affect the programming part
- 9. • >>> 3+5 addition • This shows syntax error • >>> 3+5 #addition commands • No error and output displayed as 8
- 10. Identifiers • It is a name given to variable, function, class, module or other object etc • Can begin with uppercase or lowercase letters or an Underscore with a combination of any number of letters, digits or underscores • No other special characters are allowed • Spaces are not allowed • Python is a case sensitive language Eg: Hello and hello different variables • Class name starts with a uppercase letter
- 11. • Examples • Valid: MyName, My_Name , _myName • Invalid: My Name, 3rdYear, Your#Name
- 12. Thank You