string method

find:

return the offset of argument

ex:

'test'.find('es')

--->  1

replace:

a='test'

a.replace('t' , 'b')

--->  a is 'best'

split:

'aaa,bbb'.split(',')

--> [ 'aaa', 'bbb' ]

upper:

'test'.upper()

--->  'TEST'

isalpha(),  isdigit()

rstripe()

remove whitespace on the right side

ord

ex:

ord('a')

--> 97

""":

ex:

a= """

b

  ""

c

"""

print a

--->   b 

             ""

          c

format string:

ex:

n1=1

n2=2

print (" num1 %d num2 %d"  %(n1, n2) )