Seminar report on python 3 course

ACKNOWLEDGEMENT
It is our proud privilege and duty to acknowledge the kind of help and guidance
received from several people in preparation of this report. It would not have
been possible to prepare this report in this form without their valuable help,
cooperation and guidance.
First and foremost, we wish to record our sincere gratitude to Prof., Dr. Sashi
Kumar Sharma for his constant support and encouragement in preparation
of this report and for making available library and laboratory facilities needed
to prepare this report.
The seminar on “Python 3” was very helpful to us in giving the necessary
background information and inspiration in choosing this topic for the seminar.
Their contributions and technical support in preparing this report are greatly
acknowledged.
Last but not the least, we wish to thank our parents for financing our studies in
this college as well as for constantly encouraging us to learn engineering. Their
personal sacrifice in providing this opportunity to learn engineering is
gratefully acknowledged.

Table Of Contents
CHAPTER 1. Introduction
1.1 Python
1.2 Scripting Language
1.3 Object Oriented Programming
1.4 History of python
1.5 Behind the Scene of Python
CHAPTER 2. Downloading & Installing Python
2.1 Downloading Python
2.2 Installing Python
2.3 Setup path of variable
2.4 Running The Python IDE
2.5 Python code Execution.
CHAPTER 3.Data Types & Operator
3.1 Variables
3.2 String
3.3 Python Operator
3.3.1 Arithmetic Operator
3.3.2 Comparison Operator
3.3.3 Logical Operator
CHAPTER 4. Tuple & List
4.1 Tuple
4.1.1 Accessing Tuple Values
4.1.2 Built in Operation
4.1.3 Built in Functions
4.2 List
4.2.1 Accessing List Values
4.2.2 Built in Operation
4.2.3 Built in Functions

CHAPTER 5.Loops & Conditional Statements
5.1 Loops
5.1.1Loops Definition
5.1.2 Loops Example
5.2 Conditional Statement
5.2.1 ConditionalStatement Definition
5.2.2 ConditionalStatement Example
5.3 Function
5.3.1 Syntex& Examples
CHAPTER 6.Uses & Scope
6.1 Scope of Python
6.2 What can wedo With Python?
6.3 Who Uses Python Today?
6.4 Why do People Use Python
CHAPTER 7. Conclusion

Chapter-: 1
Python
Python is a widely used high-level, general-purpose, interpreted, dynamic
programming language. Its design philosophy emphasizes codereadability, and
its syntaxallows programmers to express concepts in fewer lines of code than
would be possiblein languages such as C++ or Java. The language provides
constructs intended to enable clear programs on both a small and large scale.
Python supports multiple programming paradigms, including object-oriented,
imperative and functional programming or proceduralstyles. Itfeatures a
dynamic type systemand automatic memory management and has a large and
comprehensivestandard library. Python interpreters areavailable for
installation on many operating systems, allowing Python codeexecution on a
wide variety of systems.
Scripting Language
A scripting or scriptlanguage is a programming languagethat supports scripts,
programs written for a special run-time environment that automate the
execution of tasks that could alternatively be executed one-by-oneby a human
operator.
Scripting languages are often interpreted (rather than compiled). Primitives
are usually the elementary tasks or API calls, and the language allows them to
be combined into morecomplex programs. Environments thatcan be
automated through scripting include softwareapplications, web pages within a
web browser, theshells of operating systems (OS), embedded systems, as well
as numerous games.
A scripting language can be viewed as a domain-specific language for a
particular environment; in the case of scripting an application, this is also
known as an extensionlanguage. Scripting languages arealso sometimes
referred to as very high-level programming languages, as they operate at a
high level of abstraction, or as control languages.

Object Oriented Programming Language
Object-oriented programming (OOP) is a programming paradigm based on the
concept of "objects", which may contain data, in the formof fields, often
known as attributes; and code, in the form of procedures, often known as
methods. A distinguishing feature of objects is that an object's procedures can
access and often modify the data fields of the object with which they are
associated (objects have a notion of "this" or "self").
In OO programming, computer programs aredesigned by making them out of
objects that interact with one another. There is significantdiversity in
objectoriented programming, butmost popular languages are class-based,
meaning that objects are instances of classes, which typically also determines
their type.
History
Python was conceived in the late 1980s, and its implementation was started in
December 1989 by Guido van Rossumat CWI in the Netherlands as a successor
to the ABC language (itself inspired by SETL) capable of exception handling and
interfacing with the Amoeba operating system. Van Rossumis Python's
principal author, and his continuing central role in deciding the direction of
Python is reflected in the title given to him by the Python community,
benevolent dictator for life (BDFL).
“Python is an experiment in how much freedomprogrammers need.
Too much freedomand nobody can read another's code; too little
and expressiveness is endangered.” - Guido van Rossum.
Behind The Scene of Python
About the origin of Python, Van Rossumwrotein 1996:
Over six years ago, in December 1989, I was looking for a "hobby"
programming projectthat would keep me occupied during the week around
Christmas. My office ... would be closed, but I had a home Computer, and not
much else on my hands. I decided to write an interpreter for the new scripting
language I had been thinking about lately: a descendantof ABC that would
appeal to Unix/C hackers. I chosePython as a working title for the project,
being in a slightly irreverent mood (and a big fan of Monty Python'sFlying
Circus).

Chapter-: 2
Downloading Python
If you don’t already have a copy of Python installed on your computer, you will
need to open up your Internetbrowser and go to the Python download page
(http://www.python.org/download/).
Now that you are on the download page, select which of the softwarebuilds
you would like to download. For the purposes of this article we will usethe
most up to date version available (Python 3.4.1).
Once you have clicked on that, you will be taken to a page with a description of
all the new updates and features of 3.4.1, however, you can always read that
while the download is in process. Scrollto the bottom of the page till you find
the “Download” section and click on the link that says “download page.”
Now you will scroll all the way to the bottom of the page and find the “Windows
x86 MSI installer.” If you want to download the 86-64 bitMSI, feel free to do so.
We believe that even if you have a 64-bitoperating systeminstalled on your
computer, the 86-bitMSI is preferable. We say this becauseit will still run well
and sometimes, with the 64-bitarchitectures, someof the compiled binaries and
Python libraries don’twork well.
Installing Python
Once you have downloaded the Python MSI, simply navigate to the download
location on your computer, double clicking the file and pressing Run when the
dialog box pops up. If you are the only person who uses your computer, simply
leave the “Installfor all users” option selected. If you have multiple accounts on
your PC and don’t want to install it across all accounts, select the “Installjustfor
me” option then press “Next.”if you wantto changethe install location, feel free
to do so; however, it is best to leave it as is and simply select next, Otherwise...
Scroll down in the window and find the “Add Python.exeto Path” and click on the
small red “x.” Choose the “Will be installed on local hard drive” option then press
“Next.”
Now that you have completed the installation process, click on “Finish.

Setup the Path Variable
Begin by opening the startmenu and typing in “environment” and select the
option called “Edit the systemenvironmentvariables.”
When the “SystemProperties” window appears, click on “Environment
Variables…”.
Once you have the “EnvironmentVariables” window open, direct your focus to
the bottom half. You will notice that it controls all the “SystemVariables” rather
than justthis associated with your user. Click on “New…” to create a new variable
for Python.
Simply enter a name for your Path and the code shown below. For the purposes
of this example wehave installed Python 2.7.3, so wewill call the path:
“Pythonpath.” The string that you will need to enter is:
“C:Python27;C:Python27Scripts;”
Running The Python IDE
Now that we have successfully completed the installation process and added our
“EnvironmentVariable,” you are ready to create your firstbasic Python script.
Let’s begin by opening Python’s GUI by pressing “Start” and typing “Python” and
selecting the “IDLE(Python GUI).”
Once the GUI is open, we will begin by using the simplest directive possible. This is
the “print” directive which simply prints whatever you tell it to, into a new line.
Start by typing a print directive like the one shown in the image below or copy
and paste this text then press “Enter”: print (“Congratulations on executing your
firstprint directive!”).
Python Code Execution
Python’s traditionalruntime execution model: sourcecode you type is
translated to byte code, which is then run by the Python Virtual Machine. Your
code is automatically compiled, but then it is interpreted.
Sourcecode extension is .py
Byte code extension is .pyc (compiled python code)

Chapter-: 3
Data Type
Data types determine whether an object can do something, or whether it just
would not make sense. Other programming languages often determine
whether an operation makes sensefor an object by making surethe object can
never be stored somewherewherethe operation will be performed on the
object (this type systemis called static typing). Python does not do that.
Instead it stores the type of an object with the object, and checks when the
operation is performed whether that operation makes sensefor that object
(this is called dynamic typing).
Python has many native data types. Here are the important ones:
Booleans are either True or False.
Numbers can be integers (1 and 2), floats (1.1 and 1.2), fractions (1/2 and
2/3), or even complex numbers.
Strings are sequences of Unicode characters, e.g. an HTML document.
Bytes and byte arrays, e.g. a JPEG image file.
Lists are ordered sequences of values.
Tuples are ordered, immutable sequences of values.
Sets are unordered bags of values.
Variable
Variables are nothing but reserved memory locations to store values. This means
that when
you create a variable you reserve some spacein memory.
Based on the data type of a variable, the interpreter allocates memory and decides
what can
be stored in the reserved memory. Therefore, by assigning different data types to
variables,
you can store integers, decimals or characters in these variables.
Ex:
counter = 100 # An integer assignment
miles = 1000.0 #A floating point
name = "John" # A string

String
In programming terms, weusually call text a string. When you think of a string as
a collection of letters, the term makes sense.
All the letters, numbers, and symbols in this book could be a string.
For that matter, your name could be a string, and so could your
address.
Creating Strings
In Python, wecreate a string by putting quotes around text. For example, we
could take our
otherwiseuseless
• "hello"+"world" "helloworld" #concatenation
• "hello"*3 "hellohellohello" # repetition
• "hello"[0] "h" # indexing
• "hello"[-1] "o" #(fromend)
• "hello"[1:4] "ell" # slicing
• len("hello") 5 # size
• "hello" < "jello" 1 # comparison
• "e" in "hello" 1 # search
Python Operator
->Arithmetic Operator
Operator Meaning Example
+ Add two operands or unary plus
x + y
+2
- Subtractright operand from the left or unary minus
x - y
-2
* Multiply two operands x* y
/
Divide left operand by the right one (always results into
float)
x / y
%

Modulus - remainder of the division of left operand by the
right
x % y (remainder
of x/y)
//
Floor division - division that results into whole number
adjusted to the left in the number line
x // y
** Exponent - left operand raised to the power of right
x**y (x to the
power y)
Comparison Operator
> Greater that - True if left operand is greater than the right x > y
< Less that - True if left operand is less than the right x < y
== Equal to - True if both operands are equal
x ==y
!= Not equal to - True if operands arenot equal
x !=
y>=
Greater than or equal to - True if left operand is greater than or equal
to the right
x >=
y<=
Less than or equal to - True if left operand is less than or equal to the
right
x <=y
Logical Operator
Operator Meaning Example
and True if both the operands are true x and y
or True if either of the operands is true x or y
not
True if operand is false (complements the
operand)
not x

Chapter-: 4
Tuples
A tuple is a sequenceof immutable Python objects. Tuples are sequences, just
like lists. The differences between tuples and lists are, the tuples cannot be
changed unlike lists and tuples use parentheses, whereas lists usesquare
brackets.
Creating a tuple is as simple as putting different comma-separated values.
Optionally you can put these comma-separated values between parentheses
also. For example −
tup1 = ('physics', 'chemistry', 1997, 2000);
tup2 = (1, 2, 3, 4, 5 );
tup3 = "a", "b", "c", "d";
Accessing Values in Tuples:
To access values in tuple, use the squarebrackets for slicing along with the
index or indices to obtain value available at that index. For example −
tup1 = ('physics', 'chemistry', 1997, 2000);
tup2 = (1, 2, 3, 4, 5, 6, 7 );
print "tup1[0]: ", tup1[0]
print "tup2[1:5]: ", tup2[1:5]
When the above code is executed, it produces the following result−
tup1[0]: physics
tup2[1:5]: [2, 3, 4, 5]
Basic Tuples Operations
Tuples respond to the + and * operators much like strings; they mean
concatenation and repetition here too, except that the resultis a new tuple,
not a string. In fact, tuples respond to all of the general sequence operations
we used on strings in the prior chapter –
Python ExpressionResults Description
len((1, 2, 3)) 3 Length
(1, 2, 3) + (4, 5, 6) (1, 2, 3, 4, 5, 6) Concatenation
('Hi!',) * 4 ('Hi!', 'Hi!', 'Hi!', 'Hi!') Repetition
3 in (1, 2, 3) True Membership
for x in (1, 2, 3): print x, 1 2 3 Iteration

Built-in Tuple Functions
Python includes the following tuple functions −
SN Function with Description
1 cmp(tuple1,tuple2) Compares elements of both tuples.
2 len(tuple) Gives the total length of the tuple.
3 max(tuple) Returns item fromthe tuple with max value.
4 min(tuple)Returns item from the tuple with min value.
5 tuple(seq) Converts a list into tuple.
List
The list is a mostversatile datatype available in Python which can be written as
a list of comma-separated values (items) between squarebrackets. Important
thing about a list is that items in a list need not be of the same type.
Creating a list is as simple as putting different comma-separated values
between squarebrackets. For example −
list1 = ['physics', 'chemistry', 1997, 2000];
list2 = [1, 2, 3, 4, 5 ];
list3 = ["a", "b", "c", "d"];
Similar to string indices, list indices start at 0, and lists can be sliced,
concatenated and so on.
Accessing Values in Lists:
To access values in lists, use the squarebrackets for slicing along with the index
or indices to obtain value available at that index. For example −
list1 = ['physics', 'chemistry', 1997, 2000];
list2 = [1, 2, 3, 4, 5, 6, 7 ];
print "list1[0]: ", list1[0]
print "list2[1:5]: ", list2[1:5]
Output:list1[0]: physics
list2[1:5]: [2, 3, 4, 5]
Update: list = ['physics', 'chemistry', 1997, 2000];
print "Value available at index 2 : "
print list[2]
list[2] = 2001;
print "New value available at index 2 : "
print list[2]

Output:Valueavailableat index 2 : 1997
New value available at index 2 : 2001
Delete: list1 = ['physics', 'chemistry', 1997, 2000];
print list1
del list1[2];
print "After deleting value at index 2 : "
print list1
['physics', 'chemistry', 1997, 2000]
Output:After deleting value at index 2 :
['physics', 'chemistry', 2000]
Basic List Operation
Python ExpressionResults Description
len([1, 2, 3]) 3 Length
[1, 2, 3] + [4, 5, 6] [1, 2, 3, 4, 5, 6] Concatenation
['Hi!'] * 4 ['Hi!', 'Hi!', 'Hi!', 'Hi!'] Repetition
3 in [1, 2, 3] True Membership
for x in [1, 2, 3]: print x, 1 2 3 Iteration
Built-in List Functions& Methods:
SN Function with Description
1 cmp(list1,list2) Compares elements of both lists.
2 len(list) Gives the total length of the list.
3 max(list) Returns item fromthe list with max value.
4 min(list) Returns item fromthe list with min value.
5 list(seq)Converts a tuple into list.
Python includes following list methods
SN Methodswith Description
1 list.append(obj) Appends object obj to list
2 list.count(obj) Returns count of how many times obj occurs in list
3 list.extend(seq) Appends the contents of seq to list
4 list.index(obj) Returns the lowest index in list that obj appears
5 list.insert(index,obj) Inserts objectobj into list at offset index
6 list.pop(obj=list[-1])Removes and returns last objector obj from list
7 list.remove(obj) Removes object obj fromlist
8 list.reverse() Reverses objects of list in place
9 list.sort([func]) Sorts objects of list, use comparefunc if given

Chapter-: 5
Loops
Programming languages providevarious controlstructures thatallow for more
complicated execution paths.
A loop statement allows us to execute a statement or group of statements
multiple times. The following diagramillustrates a loop statement:-

Python programming languageprovides following types of loops to handle
looping requirements.
Example:
For Loop:
>>> for mynum in [1, 2, 3, 4, 5]:
print "Hello", mynum
Hello 1
Hello 2
Hello 3
Hello 4
Hello 5
While Loop:
>>> count = 0
>>> while (count < 4):
print 'The count is:', count
count = count + 1
The count is: 0

The count is: 1
The count is: 2
The count is: 3
ConditionalStatements:
Decision making is anticipation of conditions occurring whileexecution of the
programand specifying actions taken according to the conditions.
Decision structures evaluate multiple expressions which produceTRUE or
FALSEas outcome. You need to determine which action to take and which
statements to execute if outcome is TRUE or FALSEotherwise.

Python programming languageprovides following types of decision making
statements. Click the following links to check their detail.
Example:
If Statement:
>>> state = “Texas”
>>> if state == “Texas”:
print “TX
TX
If...Else Statement:
>>> if state == “Texas”
print “TX”
else:
print “[inferior state]”
If...Else...If Statement:
>>> if name == “Paige”
print “Hi Paige!”
elif name == “Walker”:
print “Hi Walker!”

else:
print “Imposter!”
Function
Function blocks begin with the keyword deffollowed by the function name
and parentheses ( ( ) ).
Any input parameters or arguments should be placed within these
parentheses. You can also define parameters inside these parentheses.
The first statement of a function can be an optional statement - the
documentation string of the function.
The code block within every function starts with a colon (:) and is indented.
The statement return [expression] exits a function, optionally passing back an
expression to the caller. A return statement with no arguments is the same as
return None.
Syntax:
def functionname( parameters ):
"function_docstring"
function_suite
return [expression]
Example:
1. def printme( str ):
"This prints a passed string into this function"
print str
return
2. # Functiondefinitionis here
def printme( str ):
"This prints a passed string into this function"
print str
return;
# Now you can call printmefunction
printme("I'mfirstcall to user defined function!")
printme("Again second call to the samefunction")

Chapter-: 6
Scope of Python
Science
- Bioinformatics
SystemAdministration
-Unix
-Web logic
-Web sphere
Web Application Development
-CGI
Testing scripts
What Can We do With Python?
Systemprogramming
GraphicalUser InterfaceProgramming
InternetScripting
Component Integration
DatabaseProgramming
Gaming, Images, XML , Robot and more
Who Uses Python Today?
Python is being applied in real revenue-generating products by real
companies.
Googlemakes extensive useof Python in its web search system, and
employs Python’s creator.
Intel, Cisco, Hewlett-Packard, Seagate, Qualcomm, and IBMusePython
for hardwaretesting.
ESRI uses Python as an end-user customization tool for its popular GIS
mapping products.
The YouTube video sharing serviceis largely written in Python.

Why Do People Use Python?
The following primary factors cited by Python users
seem to be these:
Python is object-oriented
o Structure supports such concepts as polymorphism, operation
overloading, and multiple inheritance.
Indentation
o Indentation is one of the greatest futurein Python.
It's free(open source)
o Downloading and installing Python is free and easy
o Source code is easily accessible
It's powerful
o Dynamic typing
o Built-in types and tools
o Library utilities
o Third party utilities (e.g. Numeric, NumPy, SciPy)
o Automatic memory management
It's portable
o Python runs virtually every major platformused today
o As long as you havea compatible Python interpreter installed,
Python programs willrun in exactly the same manner, irrespective
of platform.

Chapter-: 7
CONCLUSION
I believe the trial has shown conclusively that it is both possible and
desirable to use Python as the principal teaching language:
o It is Free (as in both costand sourcecode).
o It is trivial to install on a Windows PCallowing students to take
their interest further. For many the hurdleof installing a Pascalor
C compiler on a Windows machine is either too expensive or too
complicated;
o It is a flexible tool that allows both the teaching of traditional
proceduralprogramming and modern OOP; Itcan be used to
teach a large number of transferableskills;
o It is a real-world programming languagethat can be and is used in
academia and the commercial world;
o It appears to be quicker to learn and, in combination with its many
libraries, this offers the possibility of more rapid student
development allowing the courseto be made more challenging
and varied;
o and most importantly, its clean syntaxoffers increased
understanding and enjoyment for students;

Seminar report on python 3 course

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