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1. Python assignment help
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2. What is Python
• Multi-purpose i.e, Web, Graphical user interface
(GUI), Scripting and many others.
• Strongly typed as well as dynamically typed.
• Focus on readability as well as productivity.
• Object oriented.
• Interpreted.
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3. Characteristics
• Easy to Learn
• High-level Language
• Interactive shell
• Strong introspection
• Cross platform
• Object Oriented
• Everything is an object
• Free and Open Source
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4. CONT..
• Useful built-in types (lists, dictionaries)
• Clean syntax, powerful extensions
• Interpreted
• Interactive
• Commonly used for producing HTML content on
websites. Great for text files
• Functional
• Extensive Libraries
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5. Languages
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• Few important types:
– FORTRAN
• Technology
– COBOL
• Business Information
– LISP
• Logic as well as AI
– BASIC
• Easy Language

6. The Python Interpreter
• Python can be an
interpreted terminology
• The actual interpreter
has an interactive
environment in order to
perform using the
language
• Results
>>>> 4 + 5
9
>>>> 4 < 15
True
>>>> “print me”
“print me”
>>>> print “print me”
print me
>>> >
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7. Print “Hello World”
• Open a terminal window and type ‘python’
• If on Windows open a Python IDE such as IDLE
• At the prompt type “Hello World !!”
>>>> ‘Hello World !!'
‘Hello World !!'
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8. The print Statement
>>>> print “Welcome”
Welcome
>>>> print “Welcome”, “Ram”
Welcome Ram
• Elements divided
through commas , print
with a space between
them
• The comma at the
end from the statement
(print “Welcome”,)
won't printing the new
line character
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9. The Documentation
>>> > “welcome'
‘welcome'
>>> #‘comment'
>>>
‘#’ : this symbol is used for starts a
comment
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10. Variables
• Do not need to declare
• Should determine (initialize)
• Using uninitialized variable improves
exception
• Certainly not typed
in case ,friendly: greeting = “Hello World"
else: greeting = 12**2
print greeting
• Anything is often a ‘variable’:
• Even characteristics, classes, modules
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11. Everything is an object
• Everything means,
which includes
functions as well as
classes
• Data type is usually a
property of the object
instead of on the
variable
>>>> x = 9
>>> x
9
>>>> x = “Welcome”
>>>> x
“Welcome”
>>>>
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12. Interactive “Shell”
• This is good for learning the language
• Good for experimenting for using your library
• Good for testing for using your own modules
• 2 variants: IDLE (GUI),
python (command line)
• Kind statements or even expressions at prompt:
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>>>> print "Hello, World"
Hello, World
>>>> x = 12**2
>>>> x/2
72
>>>> # (this is a comment)

13. Numbers
• The typical suspects:
• 13, 3.15, 0xFF, 0377, (-1+2)*3/4**5, abs(x), 0<x<=5
• C-style shifting & masking:
• 1<<17, x&0xff, x|1, ~x, x^y
• Integer division truncates:
• 1/2 -> 0 # 1./2. -> 0.5, float(1)/2 -> 0.5
• fixed in the future
• Long complicated:
• 2L**100 -> 1267650600228229401497607505376L
– Within Python 2.2 as well as past, 2**100 will the
same
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14. Strings
• ‘Hello’+ ‘World’ ‘HelloWorld’ # Concatenation
• ‘Hello’*2 ‘HelloHello’ # Repetition
• ‘Hello’[0] ‘h’ # Indexing
• ‘Hello’[-1] ‘o’ # (From end)
• ‘Hello’[1:4] ‘ell’ # Slicing
• len(‘Hello’) 5 # Size
• ‘Hello’< ‘jello’ 1 # Comparison
• ‘e’ in ‘hello’ 1 # Search
• ‘escapes: n etc, 033 etc, if etc’
• 'single quotes' """triple quotes""" r ‘raw strings’
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15. Lists
• Variable arrays, definitely, not Lisp-like
linked lists
• x = [99, [‘on’, ‘the’, ‘wall’]]
• Exact same providers for strings
• x+y, x*3, x[0], x[-1], x[1:], len(x)
• Item and slice assignment
• x[0] = 98
-> [98, [‘on’, ‘the’, ‘wall’]]
• del x[-1] # -> [98]
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16. Tuples
• Tuples tend to be
immutable versions
associated with lists
• One strange may be the
structure to create a tuple
along with one element:
‘,’ is required to
differentiate from the
numerical expression (2)
>>>> a = (1,2,3)
>>> >a[1:]
(2, 3)
>>>> b = (2,)
>>> >b
(2,)
>>> >
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17. Dictionaries
• Some key-value sets
• Dictionaries tend to be mutable
>>> x = {1 : ‘Welcome', ‘Two' : 32, ‘Hi' : [4,5,6]}
>>> x
{1: ‘Welcome', ‘Two': 32, ‘Hi': [1, 2, 3]}
>>> x[‘Hi']
[4,5,6]
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18. Standard Library
• Core:
– operating system, sys, string, StringIO, struct, pickle etc
• Regular expressions:
– re module, Perl-5 style patterns as well as matching
rules
• Web:
– socket, rfc822, httplib, htmllib etc
• Miscellaneous:
– pdb
– Tkinter, audio etc
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19. Thank You
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