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Python - Part 1Getting started with PythonTradeyathra - Stock market training and forecasting expertsNicholas I

AgendaIntroductionBasicsStringsControl StructuresList, Tuple, DictionaryFunctionsI/O, Exception HandlingRegular ExpressionsModulesObject Oriented Programming

Program & ProgrammingWhat is Python?Where It’s Used?InstallationPracticeIntroductionModule 1

A Program is a set of instructions that a computer follows to perform a particulartask.ProgramStep 1Plug the TV wire tothe electric switchboard.Step 2Turn your Tv on.Step 3Press the powerbutton on your TVremote.Step 4Switch between thechannels by directlyentering the numbersfrom your remote.How to turn on a tv with remote

Programming is the process of writing your ideas into a program using a computerlanguage to perform a task.ProgrammingProgramming languages

● It was created in 1991 by Guido van Rossum.● Python is an interpreted, interactive, object-oriented programming language.● Python is a high-level general-purpose programming language that can beapplied to many diﬀerent classes of problems.● Python is portable: it runs on many Unix variants, on the Mac, and on Windows2000 and later● Easy to learn and understand.● Simple syntax and Flexible.What is Python?

Where it is used?Web and InternetDevelopmentScientiﬁc & Numeric Games Desktop GUISoftwareDevelopmentBusinessApplicationsCloud & Data CenterIoT, MachineLearning & AI

InstallationWindows● https://www.python.org/ftp/python/3.6.6/python-3.6.6rc1-webinstall.exe● Follow the wizard and ﬁnish the installation.● Setup the environment variables.Mac and Linux● Mac and Linux comes with python preinstalled.

PracticeTime to set-uppython on your system...

Interactive & Script ModeCommentsNumbersVariablesConstantsInput and OutputBasicsModule 2

Interactive & Script ModeScript ModeInteractive

Comments# Single Line Comment# multi# line# Comment""”Docstring is short for documentation string.It is a string that occurs as the ﬁrst statement in a module, function, class, or method deﬁnition.We must write what a function/class does in the docstring."""

Numbersaddition >>> 8 + 513subtraction >>> 8 - 53multiplication >>> 8 * 513division >>> 8 / 513exponent >>> 4 ** 364negation >>> -2 + -4-6

Integer and Floatint >>> 3535>>>float >>> 30.530.5An int is a whole number A float is a decimal number

Order of Operations>>> ( 5 + 7 ) * 3 >>> 5 + 7 * 336 26PEMDAS: Parentheses Exponent Multiplication Division Addition Subtraction>>> 12 * 3 >>> 5 + 21

Variables>>> apples_in_box = 105Variable is the container that stores some value.>>> apples_sold = 5>>> apples_balance = apples_in_box - apples_sold510>>> fruit_box = 100variable name Value to be stored

Naming VariablesName your variables meaningful and As long as you’re not breaking these rules,you can name variables anything you want.no spaces = 0 X No spaces in the name3eggs, $price X No digits or special characters in front

ConstantsConstants are used to store a value that can be used later in your program. Thevalue of the constant remains same and they do not change.>>> PI = 3.14constant name Value to store>>> GRAVITY = 9.8

Input and Output>>> input([prompt])Function to acceptvalue from usersvia cliValue to beentered by user>>> print([output])Function to outputvalue to usersValue printed onthe user screen

String DelimitersConcatenationTriple quoted string literalsEscape CodesString MethodsStringsModule 3

StringsA string in Python is a sequence of characters. For Python to recognize asequence of characters, like hello, as a string, it must be enclosed in quotes todelimit the string.>>> "Hello"Note:A string can have any number of characters in it, including 0. The empty string is '' (two quote characters with nothingbetween them). Many beginners forget that having no characters is legal. It can be useful.>>> 'Hello'

ConcatenationThe plus operation with strings means concatenate the strings. Python looks atthe type of operands before deciding what operation is associated with the +.>>> "Firstname" + "lastname" >>> 'Hello'Firstnamelastname>>> 3 * 'Smart' + 'Phone'SmartSmartSmartPhone>>> 7 + "star"?

Note:The line structure is preserved in a multi-line string. As you can see, this also allows you to embedboth single and double quote characters!Triple Quoted String LiteralsStrings delimited by one quote character are required to be within a single line.For example: ‘hello’.It is sometimes convenient to have a multi-line string, whichcan be delimited with triple quotes, '''.

Note:The line structure is preserved in a multi-line string. As you can see, this also allows you to embedboth single and double quote characters!Escape CodesEscape codes are embedded inside string literals and start with a backslashcharacter . They are used to embed characters that are either unprintable orhave a special syntactic meaning to Python that you want to suppress.

String MethodsPython has quite a few methods that string objects can call to perform frequencyoccurring task (related to string). For example, if you want to capitalize the ﬁrstletter of a string, you can use capitalize() methodcapitalize() Converts first character to capital lettercount() Counts the occurrences of a substringupper() Returns uppercased stringlower() Returns lowercased stringlen() Returns length of a stringsplit() Separates the words in sentences.

if , elif and elsewhileforbreakControlStructuresModule 4

if, elif & elseif condition:statementselse:statementif condition:statementselif condition:statementselse:statementsa = 0if a == 0:print('A is equal to 0')else:print('A is not equal to 0')a = 2if a == 0:print('A is equal to 0')elif a == 1:print('A is equal to 1')else:print('A is not equal to 0 or 1')Theif…elif…elsestatement isused fordecisionmaking.Syntax SyntaxRun Run

Loginuname = 'admin'pword = 'admin'# user to enter their usernname & passwordusernname = input('username: ')password = input('password: ')if usernname == uname and password == pword:print('Login successful')else:print('Sorry! Invalid username and password')

whileRun the statements until a given condition is true.while condition:statementSyntaxmovie = 'Spider Man'while movie == 'Spider Man':print('Yes! I am Spider Man')breakRun

forLoops through elements in sequence & store in a variablethat can be used later in the program.for variable in sequence:statementSyntax

for# print 0-9 numbers using for loopfor number in range(10):print(number)Run# print all the elements in fruits listfruits = ['apple','banana','orange']for fruit in fruits:print(fruit)Run

for - nestedcountries = ['India','US','China','Europe']fruits = ['apple','banana','orange']for country in countries:for fruit in fruits:print(country,':', fruit)print('-----------------')Run

breaka = 0while a==0:print('hello')Runa = 0while a==0:print('hello')breakRun

Nicholas ITradeyathranicholas.domnic.i@gmail.comCall / Whatsapp : 8050012644Telegram: t.me/tradeyathraThank You

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