queue

a=[]

c= "y"

while(c=="y"):

print("1. INSERT")

print("2. DELETE")

print("1. DISPLAY")

choice=int(input("Enter Your Choice:"))

if(choice==1):

b=input("Enter new number:")

a.append(b)

elif(choice==2):

if(a==[]):

print("Queue is Empty")

else:

print("Deleted value is:",a[0])

a.pop(0)

elif(choice==3):

length=len(a)

for i in range(0,length):

print(a[i])

else:

print("Wrong Input")

c=input("Do you want to continue")

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Data Management {CLASS XI}

Q: What is a Database? The collection of data is usually referred to as the DATABASE. The database maintains the information that help to the decision-making process in an organization. The same data in a database may serve many application. e.g.: A database of employees of an organization, Database of students of a school, etc. Database System It is basically a computer based record keeping system. The Relational Data Model In Relational data model, the data is organized into tables ( i.e. rows & cols). These tables are called relations. A row in a table represents a relationship among a set of values. Terminology in RDBMS The different terms used in the relational model are: 1.Relation 2.Tuples 3.Attributes 4.Degree 5.Cardinality 6.Domain 1. Relation A Relation is a table (i.e rows & cols) In above example (STUDENT) is a relation that has 4 rows (records) and 3 columns (fields). 2. Tuples The rows of a relation are gener

PYTHON FUNDAMENTALS

Python Character Set Tokens Keyword Identifiers (Names) Literals Operators Punctuators Keywords A keyword is a word having special meaning reserved by the programming language. More on keywords…. ¨ We cannot use a keyword as variable name , function name or any other identifier . ¨ In Python, keywords are case sensitive . ¨ All the keywords except True, False and None are in lowercase and they must be written as it is. The list of all the keywords are given below. Python Identifiers ¨ Identifier is the name given to entities like class, functions, variables etc. in Python. It helps differentiating one entity from another. Rules for writing identifiers ¨ Identifiers can be a combination of let

CYBER SAFETY Introduction-Cyber Safety :- Cyber safety is the safe and responsible use of Internet & ICT(Information & Communication Technology). Cyber safety is about to not only keeping information safe and secure, but also being responsible with that information, being respectful of other people online. As per Cyber safety peoples are advised to use good 'netiquette' (internet etiquettes). Safely Browsing the Web :- Viruses and malware spread, easily and quickly through websites/web browsing. Through clicking over the links found on web pages or in email mistakenly our computer may be infected. An infected computer can run slow, barrage us with pop-ups, download other programs without our permission, or allow our sensitive personal information to others. Tips for Safe Web Browsing  Common sense- (never respond to spam & disclose personal information).  Use an antivirus & Firewall- It provide

TUPLES

The Python tuples are sequences that are used to store a tuple of values of any type. • Tuples are immutable. • Tuple is a type of sequence like string and list but it differs from them in way that lists are mutable but strings and tuples are immutable Creating and Accessing Tuples Tuples are depicted through parenthesis. () Empty tuple (1,2,3) Tuple of integers (2,3.5,6,7.5) Tuple of integer and float (‘ x’,’y’,’z ’) Tuples of characters Creating Tuples 1. Empty Tuple >>> t=tuple() >>> t () 2. Single Element >>> t=(1) >>> t 1 >>> t=3 , # to construct a tuple with one element just add comma >>> t (3,) 3. Long Tuples >>> t1=(11,22,33,44,55,66,77,88) >>> t1 (11, 22, 33, 44, 55, 66, 77, 88) >>> print (t1) (11, 22, 33, 44, 55, 66, 77, 88) 4. Nested Tuples : t=(11,22,(33,44),55) >>> t (11, 22, (33, 44), 55) Creating Tuple

mysql connector

import mysql.connector import datetime mydb=mysql.connector.connect(host="localhost",\ user="root",\ passwd="root",\ database="practicalexam") mycursor=mydb.cursor() def teacheradd(): L=[] tno=int(input("Enter tno:")) L.append(tno) tname=input("Enter tname:") L.append(tname) tsalary=int(input("Enter tsalary:")) L.append(tsalary) value=L value=(tno,tname,tsalary) sql="insert into teacher(tno,tname,tsalary)values(%s,%s,%s)" mycursor.execute(sql,value) mydb.commit() def teachersearch(): tn=int(input("Enter tno to search")) rl=(tn,) sql="select * from teacher where tno=%s" mycursor.execute(sql,rl) res=mycursor.fetchall() print("Details are as follows:") print("(tno,tname,tsalary)")

INTRODUCTION

Python is a general purpose interpreted , object oriented and high level programming language. It was created by GUIDO VAN ROSSUM in FEBRUARY 1991. Python is based on or influenced with two programming languages : ABC Language Modula - 3 Features of python : Easy to learn Easy to read Easy to maintain Interactive mode Portable GUI Programming Some minuses of python : Not the fastest language Lesser libraries than C , Java , Perl Not strong on type-binding Not easily convertible List of companies using python for revenue generation : Google Youtube Torrent Intel Cisco HP IBM NASA Maya i-Robot

LIST (Class XI) • It is an ordered set of values enclosed in square brackets []. • Values in the list can be modified, i.e. it is mutable. • As it is set of values, we can use index in square brackets [] to identify a value belonging to it. • The values that make up a list are called its elements, and they can be of any type. . Its syntax is: Variable name [index] (variable name is name of the list). Let's look at some example of simple list: i) >>>L1 = [1, 2, 3, 4] # list of 4 integer elements. ii) >>>L2 = [“Delhi”, “Chennai”, “Mumbai”] #list of 3 string elements. iii) >>>L3 = [ ] # empty list i.e. list with no element iv) >>>L4 = [“ abc ”, 10, 20] # list with different types of elements v) >>>L5 = [1, 2, [6, 7, 8], 3] # A list containing another list known as nested list Creating and Accessing List • To create a list, put a number of expressions in square brackets. L=[] L=[value1,

stack

s=[] c="y" while(c=="y"): print("1. PUSH") print("2. POP") print("3. DISPLAY") choice=int(input("Enter your choice")) if(choice==1): a=input("Enter any number: ") s.append(a) elif (choice==2): if(s==[]): print("Stack Empty") else: print("Element Deleted is :",s.pop()) elif(choice==3): l=len(s) for i in range(l-1,-1,-1): print(s[i]) else: print("Wrong Input") c=input("Do you want to continue?")

Python Class 11th CBSE

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