Useful python help command

help( )  : command is used to get details of function or statement from python inbuild library. Eg .                print

help(' ')  : To get information about operators . Eg . return

To get info about the variable used ,  import the module and get help

eg . import math

a = 4

help(a)

to get the type of the variable use : type ( ) . Eg type(a)

To get a reverse of a line from a file

f = open('word.txt')
while True:
line = f.readline()
if len(line) == 0:
break
print(line)
print line[::-1]

f.close

Its Easy to install Fedora 14 along with Windows as a dual OS.

Click on the default buttons untill the installation type  screen appears .

-> After choose  Shrink Current System option .

->Or choose Replace Existing Linux System option. [Note: If a linux OS previously installed this method removes it.

[slideshow]

By Choosing this we need not create partions of it. After selecting the option click the default buttons which enable us to complete the fedora installation.

To Find Palindrome or Not

x = raw_input("enter the word to test palindrome:")

a = x[::-1]

if x==a :
print("The word is palindrome")

else:

print("The word is not a palindrome")

Keyboard Shortcuts : Linux

to see the contents of the current location through terminal : ls

to change the directory : cd (destination name)

also can use to change the directory  : cd {space}{tab}

to locate a file with space in its name use \ then press the number of space used and then the name of file : eg python\ prog

to exit from terminal : ctrl+shift+d

to exit from current location : ctrl+d

to open editor in terminal : vi or vim with the name of the file .

: to execute given extention , eg like py.

to quit editor  :  esc  : q

to save             : esc :w

to quit and save : esc :wq

To convert to celcius of farenheit.

x = int(raw_input("enter the value to be converted :"))

thevalue = raw_input('c or f')

if thevalue == 'f':

print 'f == %d' % (9/5*(x+32))

elif thevalue == 'c':

print 'c == %d' % (5/9*(x-32))

How to install Django in virtual environment at fedora !

sudo easy_install python : To get the python packages

easy_install virtualenv   : To install the virtual environment

source bin/activate : To activate the virtual environment.

sudo wget http://www.djangoproject.com/download/1.3/tarball/ : To download the Django in the virtual environment

tar xzvf Django-1.3.tar.gz  : to remove the tar file

cd Django-1.3 : to change the directory

sudo python setup.py install : the install destination

To check Django is installed !

To check Django is installed or not !

use the command :

import django

print django.get_version()



output:

(the version been installed eg ;-) 1.25