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1. PYTHON
WHAT IS PYTHON?
Python is an interpreted high-
level programming language for general-
purpose programming. Created by Guido van
Rossum and first released in 1991, Python has a
design philosophy that emphasizes code
readability, notably using significant whitespace.
Python interpreters are available for many
operating systems.

2. PYTHONFEATURES
• Easy-to-learn − Python has few keywords, simple structure,
and a clearly defined syntax. This allows the student to pick up
the language quickly.
• Easy-to-read − Python code is more clearly defined and visible
to the eyes.
• Easy-to-maintain − Python's source code is fairly easy-to-
maintain.
• A broad standard library − Python's bulk of the library is very
portable and cross-platform compatible on UNIX, Windows,
and Macintosh.
• Interactive Mode − Python has support for an interactive
mode which allows interactive testing and debugging of
snippets of code.
• Portable − Python can run on a wide variety of hardware
platforms and has the same interface on all platforms.

3. It supports functional and structured programming
methods as well as OOP.
It can be used as a scripting language or can be
compiled to byte-code for building large applications.
It provides very high-level dynamic data types and
supports dynamic type checking.
IT supports automatic garbage collection.
It can be easily integrated with C, C++, COM, ActiveX,
CORBA, and Java.

4. Types of Operator
• Arithmetic Operators
• Comparison (Relational) Operators
• Assignment Operators
• Logical Operators
• Bitwise Operators
• Membership Operators
• Identity Operators

5. LOOPS
WHILE LOOP
FOR LOOP
NESTED LOOP
 Repeats a statement or group of statements
while a given condition is TRUE. It tests the
condition before executing the loop body.
 Executes a sequence of statements multiple
times and abbreviates the code that manages the
loop variable.
 You can use one or more loop inside any
another while, for or do..while loop.

6. PYTHON NUMBERS
INT - They are often called just integers or ints, are
positive or negative whole numbers with no decimal
point.
LONG -Also called longs, they are integers of unlimited
size, written like integers and followed by an uppercase or
lowercase L.
FLOAT -Floats may also be in scientific notation, with E or
e indicating the power of 10 (2.5e2 = 2.5 x 102 = 250).
COMPLEX -The real part of the number is a, and the
imaginary part is b. Complex numbers are not used much
in Python programming.

7. PYTHON - LIST
The list is a most versatile datatype
available in Python which can be written as a list
of comma-separated values (items) between
square brackets. Important thing about a list is
that items in a list need not be of the same type.
FOR EXAMPLE,
list1 = ['physics', 'chemistry', 1997, 2000]; list2 =
[1, 2, 3, 4, 5 ]; list3 = ["a", "b", "c", "d"]

8. ACCESSING VALUES IN LIST
To access values in lists, use the square
brackets 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]

9. UPDATINGLIST
You can update single or multiple
elements of lists by giving the slice on the left-
hand side of the assignment operator, and you
can add to elements in a list with the append()
method.
FOR EXAMPLE,
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]

10. DELETE LIST
To remove a list element, you can use
either the del statement if you know exactly which
element(s) you are deleting or the remove()
method if you do not know.
FOR EXAMPLE,
list1 = ['physics', 'chemistry', 1997, 2000]; print
list1 del list1[2]; print "After deleting value at
index 2 : " print list1

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