1 =======

     2 Strings

     3 =======

     4 

     5 Strings were briefly introduced previously in the introduction document. In this

     6 section strings will be presented in greater detail. All the standard operations 

     7 that can be performed on sequences such as indexing, slicing, multiplication, length

     8 minimum and maximum can be performed on string variables as well. One thing to

     9 be noted is that strings are immutable, which means that string variables are

    10 unchangeable. Hence, all item and slice assignments on strings are illegal.

    11 Let us look at a few example.

    12 

    13 ::

    14 

    15   >>> name = 'PythonFreak'

    16   >>> print name[3]

    17   h

    18   >>> print name[-1]

    19   k

    20   >>> print name[6:]

    21   Freak

    22   >>> name[6:0] = 'Maniac'

    23   Traceback (most recent call last):

    24     File "<stdin>", line 1, in <module>

    25   TypeError: 'str' object does not support item assignment

    26 

    27 This is quite expected, since string objects are immutable as already mentioned.

    28 The error message is clear in mentioning that 'str' object does not support item

    29 assignment.

    30 

    31 String Formatting

    32 =================

    33