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Python programming introduction
Python programming introduction
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Programming

  1. 1. GOVERNMENT ENGINEERING COLLEGE BHARATPUR INDUSTRIAL TRAINING 2020-21 SUBMITTED BY: MONISHA GOYAL 18EELCS010 SUBMITTED TO: ANKIT SIR
  2. 2.  Python is a general purpose programming language that is often applied in scripting roles.  Python is also called as Interpreted language  Python supports multiple programming paradigms including imperative, procedural , functional and object oriented programming style.  Python can be used for • System programming • Graphical User Interface Programming • Internet Scripting • Component Integration • Database Programming • Gaming, Images, XML , Robot and more .  Python interpreters are available for installation on many operating systems, allowing Python code execution on a wide variety of systems. Eg- IDLE INTRODUCTION
  3. 3. KEYWORDS IN PYTHON KEYWORDS CLASS PRIVATE VARIABLE STRONGLY PRIVATE VARIABLE SPECIAL PURPOSE if, while Complex, Exception _aadharnum, _accountnum __mobilenum, __loginid __add__, __init__ Higher level programming languages like python provides a predefined set of keywords using which a program is coded.
  4. 4. • Numeric Any representation of data which has numeric value. Python identifies three types:- 1. INTEGER Positive and negative whole numbers. Examples: 1234, -2 etc. 2. FLOAT Real numbers with a floating point representation Examples: - 55.550 3.COMPLEX NUMBERS A number with a real and imaginary component is represented as a + bj in Python where a and b are floats and j = √-1. Examples: 4+6j. DATATYPES IN PYTHON
  5. 5. • BOOLEAN: Any representation of data which has two values denoted by True and False. • SEQUENCE: An ordered collection of similar or different data types. The built-in Sequence data types in python are: 1. STRING: A collection of one or more characters put in single, double or triple quotes. Examples: ‘Hello’, "Hello", "'Hello'", """Hello""“. 2. LIST: An ordered collection of one or more data items, not necessarily of same type, put in square brackets. Examples: [1,"Ravi",75.50, True]. 3. TUPLE: Similar to list but he contents of a tuple cannot be modified – it is immutable - after the tuple is created. Examples: (1,"Ravi", 75.50, True).
  6. 6. • DICTIONARY An unordered collection of data in key:value pair form. Collection of such pairs is enclosed in curly brackets. Example: {1:"Superman", 2:"Wonder Woman", 3:"Thor", 4: "Hulk", 5:"Black Widow“}
  7. 7. PROGRAMMING IN PYTHON INTERACTIVE MODE:-Invoking the interpreter without passing a script file as a parameter brings up the following prompt − type the following text at the Python prompt and press the Enter − this produces the following result − Interactive mode is not suitable for automated processes. So we use scripting mode.
  8. 8. SCRIPTING MODE: Instead of executing one statement at a time we write all the statement in a text file with .py extension. This script is commonly known as a python program which can be executed through command line or from run menu of IDLE. Advantages: • Easily insert update and delete statements. • Code or functions from a script can be inserted. • Automate and schedule.
  9. 9. MATH OPERATOR IN PYTHON >>> print 3 + 12 15 >>> print 12 – 3 9 >>> print 9 + 5 – 15 + 12 11 Operators: add: + subtract: - Math Rule: If you want Python to answer in floats, you have to talk to it in floats. More operators: divide: / multiply: * >>> print 3 * 12 36 >>> print 12.0 / 3.0 4.0
  10. 10. STRINGS IN PYTHON Strings operators:  Concatenation: + Adds values on either side of the operator Try concatenating: : >>> print “Hello” + “ “ + “world!” Hello world  Multiplying: * Creates new strings, concatenating multiple copies of the same string Try multiplying >>> print “HAHA” * 250
  11. 11. MODULE IN PYTHON:  A module allows you to logically organize your Python code. Grouping related code into a module makes the code easier to understand and use. A module is a Python object with arbitrarily named attributes that you can bind and reference.  Simply, a module is a file consisting of Python code. A module can define functions, classes and variables. A module can also include runnable code. The Import Statement: When the interpreter encounters an import statement, it imports the module if the module is present in the search path. When the above code is executed, it produces the following result −
  12. 12. OBJECT ORIENTED PROGRAMMING:  Python is a multi-paradigm programming language. It supports different programming approaches.  One of the popular approaches to solve a programming problem is by creating objects. This is known as Object-Oriented Programming (OOP).  An object has two characteristics: • attributes • Behavior Let's take an example:A parrot is can be an object,as it has the following properties: • name, age, color as attributes • singing, dancing as behavior  The concept of OOP in Python focuses on creating reusable code.
  13. 13. CONNECTING TO SQLITE DATABASE  MySQLdb is an interface for connecting to a MySQL database server from Python  After creating a database in mysql, we need to connect it to the python code.we follow the following steps for connectivity to the database:
  14. 14. STUDENT MANAGEMENT SYSYTEM USING PYTHON

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