Strings

#!/usr/bin/env python

import string

str = 'hello world'
#
# length 
#
print( len( str))
#
# to upper case letters
#
print( str.upper())        # -> HELLO WORLD
#
# find a substring
#
print( str.find( 'll'))   # -> 2
print( str.find( 'he'))   # -> 0
print( str.find( 'moin')) # -> -1
#
# convert to number
#
print( string.atoi( "11") + 1)   # -> 12
#
# concatenation
#
str = str + "abc"
#
# repeating
#
str = " " * 320
#
# the escape character
#
print( "abc\'d")                   # -> abc'd
#
# indexing
#
print( str[0])                   # -> h
print( str[-1])                  # -> o
#
# slicing
#
print( str[:3])                  # -> hel
print( str[1:])                  # -> ello world
print( str[:-1])                 # -> hello worl