manipulating-strings/script.rst
author Puneeth Chaganti <punchagan@fossee.in>
Thu, 07 Oct 2010 12:28:12 +0530
changeset 242 a33e942379d7
parent 217 b595f90016c5
child 265 5734d03b026c
permissions -rw-r--r--
Cleaned up script for getting started with files LO.
Ignore whitespace changes - Everywhere: Within whitespace: At end of lines:
217
b595f90016c5 Changed structure of my scripts.
Puneeth Chaganti <punchagan@fossee.in>
parents:
diff changeset
     1
========
b595f90016c5 Changed structure of my scripts.
Puneeth Chaganti <punchagan@fossee.in>
parents:
diff changeset
     2
 Script
b595f90016c5 Changed structure of my scripts.
Puneeth Chaganti <punchagan@fossee.in>
parents:
diff changeset
     3
========
b595f90016c5 Changed structure of my scripts.
Puneeth Chaganti <punchagan@fossee.in>
parents:
diff changeset
     4
b595f90016c5 Changed structure of my scripts.
Puneeth Chaganti <punchagan@fossee.in>
parents:
diff changeset
     5
{{{ show the welcome slide }}}
b595f90016c5 Changed structure of my scripts.
Puneeth Chaganti <punchagan@fossee.in>
parents:
diff changeset
     6
b595f90016c5 Changed structure of my scripts.
Puneeth Chaganti <punchagan@fossee.in>
parents:
diff changeset
     7
Welcome to this tutorial on manipulating strings. 
b595f90016c5 Changed structure of my scripts.
Puneeth Chaganti <punchagan@fossee.in>
parents:
diff changeset
     8
b595f90016c5 Changed structure of my scripts.
Puneeth Chaganti <punchagan@fossee.in>
parents:
diff changeset
     9
{{{ show the slide with outline }}} 
b595f90016c5 Changed structure of my scripts.
Puneeth Chaganti <punchagan@fossee.in>
parents:
diff changeset
    10
b595f90016c5 Changed structure of my scripts.
Puneeth Chaganti <punchagan@fossee.in>
parents:
diff changeset
    11
In this tutorial we shall learn to manipulate strings, specifically
b595f90016c5 Changed structure of my scripts.
Puneeth Chaganti <punchagan@fossee.in>
parents:
diff changeset
    12
slicing and reversing them, or replacing characters, converting from
b595f90016c5 Changed structure of my scripts.
Puneeth Chaganti <punchagan@fossee.in>
parents:
diff changeset
    13
upper to lower case and vice-versa 
b595f90016c5 Changed structure of my scripts.
Puneeth Chaganti <punchagan@fossee.in>
parents:
diff changeset
    14
b595f90016c5 Changed structure of my scripts.
Puneeth Chaganti <punchagan@fossee.in>
parents:
diff changeset
    15
#[punch: reversed returns an iterator. should we still teach it?]
b595f90016c5 Changed structure of my scripts.
Puneeth Chaganti <punchagan@fossee.in>
parents:
diff changeset
    16
b595f90016c5 Changed structure of my scripts.
Puneeth Chaganti <punchagan@fossee.in>
parents:
diff changeset
    17
We have an ``ipython`` shell open, in which we are going to work,
b595f90016c5 Changed structure of my scripts.
Puneeth Chaganti <punchagan@fossee.in>
parents:
diff changeset
    18
through out this session. 
b595f90016c5 Changed structure of my scripts.
Puneeth Chaganti <punchagan@fossee.in>
parents:
diff changeset
    19
b595f90016c5 Changed structure of my scripts.
Puneeth Chaganti <punchagan@fossee.in>
parents:
diff changeset
    20
Let us consider a simple problem, and learn how to slice strings and
b595f90016c5 Changed structure of my scripts.
Puneeth Chaganti <punchagan@fossee.in>
parents:
diff changeset
    21
get sub-strings. 
b595f90016c5 Changed structure of my scripts.
Puneeth Chaganti <punchagan@fossee.in>
parents:
diff changeset
    22
b595f90016c5 Changed structure of my scripts.
Puneeth Chaganti <punchagan@fossee.in>
parents:
diff changeset
    23
Let's say the variable ``week`` has the list of the names of the days
b595f90016c5 Changed structure of my scripts.
Puneeth Chaganti <punchagan@fossee.in>
parents:
diff changeset
    24
of the week. 
b595f90016c5 Changed structure of my scripts.
Puneeth Chaganti <punchagan@fossee.in>
parents:
diff changeset
    25
b595f90016c5 Changed structure of my scripts.
Puneeth Chaganti <punchagan@fossee.in>
parents:
diff changeset
    26
::
b595f90016c5 Changed structure of my scripts.
Puneeth Chaganti <punchagan@fossee.in>
parents:
diff changeset
    27
b595f90016c5 Changed structure of my scripts.
Puneeth Chaganti <punchagan@fossee.in>
parents:
diff changeset
    28
    week = ["sun", "mon", "tue", "wed", "thu", "fri", "sat"]
b595f90016c5 Changed structure of my scripts.
Puneeth Chaganti <punchagan@fossee.in>
parents:
diff changeset
    29
b595f90016c5 Changed structure of my scripts.
Puneeth Chaganti <punchagan@fossee.in>
parents:
diff changeset
    30
b595f90016c5 Changed structure of my scripts.
Puneeth Chaganti <punchagan@fossee.in>
parents:
diff changeset
    31
Now given a string ``s``, we should be able to check if the string is a
b595f90016c5 Changed structure of my scripts.
Puneeth Chaganti <punchagan@fossee.in>
parents:
diff changeset
    32
valid name of a day of the week or not. 
b595f90016c5 Changed structure of my scripts.
Puneeth Chaganti <punchagan@fossee.in>
parents:
diff changeset
    33
b595f90016c5 Changed structure of my scripts.
Puneeth Chaganti <punchagan@fossee.in>
parents:
diff changeset
    34
::
b595f90016c5 Changed structure of my scripts.
Puneeth Chaganti <punchagan@fossee.in>
parents:
diff changeset
    35
b595f90016c5 Changed structure of my scripts.
Puneeth Chaganti <punchagan@fossee.in>
parents:
diff changeset
    36
    s = saturday
b595f90016c5 Changed structure of my scripts.
Puneeth Chaganti <punchagan@fossee.in>
parents:
diff changeset
    37
b595f90016c5 Changed structure of my scripts.
Puneeth Chaganti <punchagan@fossee.in>
parents:
diff changeset
    38
b595f90016c5 Changed structure of my scripts.
Puneeth Chaganti <punchagan@fossee.in>
parents:
diff changeset
    39
``s`` could be in any of the forms --- sat, saturday, Sat, Saturday,
b595f90016c5 Changed structure of my scripts.
Puneeth Chaganti <punchagan@fossee.in>
parents:
diff changeset
    40
SAT, SATURDAY. We shall now be solving the problem only for the forms,
b595f90016c5 Changed structure of my scripts.
Puneeth Chaganti <punchagan@fossee.in>
parents:
diff changeset
    41
sat and saturday. We shall solve it for the other forms, at the end of
b595f90016c5 Changed structure of my scripts.
Puneeth Chaganti <punchagan@fossee.in>
parents:
diff changeset
    42
the tutorial. 
b595f90016c5 Changed structure of my scripts.
Puneeth Chaganti <punchagan@fossee.in>
parents:
diff changeset
    43
b595f90016c5 Changed structure of my scripts.
Puneeth Chaganti <punchagan@fossee.in>
parents:
diff changeset
    44
{{{ show these forms in a slide }}}
b595f90016c5 Changed structure of my scripts.
Puneeth Chaganti <punchagan@fossee.in>
parents:
diff changeset
    45
b595f90016c5 Changed structure of my scripts.
Puneeth Chaganti <punchagan@fossee.in>
parents:
diff changeset
    46
So, we need to check if the first three characters of the given string
b595f90016c5 Changed structure of my scripts.
Puneeth Chaganti <punchagan@fossee.in>
parents:
diff changeset
    47
exists in the variable ``week``. 
b595f90016c5 Changed structure of my scripts.
Puneeth Chaganti <punchagan@fossee.in>
parents:
diff changeset
    48
b595f90016c5 Changed structure of my scripts.
Puneeth Chaganti <punchagan@fossee.in>
parents:
diff changeset
    49
As, with any of the string data-types, strings can be sliced into
b595f90016c5 Changed structure of my scripts.
Puneeth Chaganti <punchagan@fossee.in>
parents:
diff changeset
    50
sub-strings. To get the first three characters of s, we say, 
b595f90016c5 Changed structure of my scripts.
Puneeth Chaganti <punchagan@fossee.in>
parents:
diff changeset
    51
b595f90016c5 Changed structure of my scripts.
Puneeth Chaganti <punchagan@fossee.in>
parents:
diff changeset
    52
::
b595f90016c5 Changed structure of my scripts.
Puneeth Chaganti <punchagan@fossee.in>
parents:
diff changeset
    53
b595f90016c5 Changed structure of my scripts.
Puneeth Chaganti <punchagan@fossee.in>
parents:
diff changeset
    54
    s[0:3]
b595f90016c5 Changed structure of my scripts.
Puneeth Chaganti <punchagan@fossee.in>
parents:
diff changeset
    55
b595f90016c5 Changed structure of my scripts.
Puneeth Chaganti <punchagan@fossee.in>
parents:
diff changeset
    56
Note that, we are slicing the string from the index 0 to index 3, 3
b595f90016c5 Changed structure of my scripts.
Puneeth Chaganti <punchagan@fossee.in>
parents:
diff changeset
    57
not included. 
b595f90016c5 Changed structure of my scripts.
Puneeth Chaganti <punchagan@fossee.in>
parents:
diff changeset
    58
b595f90016c5 Changed structure of my scripts.
Puneeth Chaganti <punchagan@fossee.in>
parents:
diff changeset
    59
As we already know, the last element of the string can be accessed
b595f90016c5 Changed structure of my scripts.
Puneeth Chaganti <punchagan@fossee.in>
parents:
diff changeset
    60
using ``s[-1]``.  
b595f90016c5 Changed structure of my scripts.
Puneeth Chaganti <punchagan@fossee.in>
parents:
diff changeset
    61
b595f90016c5 Changed structure of my scripts.
Puneeth Chaganti <punchagan@fossee.in>
parents:
diff changeset
    62
%%1%% Pause the video here and obtain the sub-string excluding the
b595f90016c5 Changed structure of my scripts.
Puneeth Chaganti <punchagan@fossee.in>
parents:
diff changeset
    63
first and last characters from the string. 
b595f90016c5 Changed structure of my scripts.
Puneeth Chaganti <punchagan@fossee.in>
parents:
diff changeset
    64
b595f90016c5 Changed structure of my scripts.
Puneeth Chaganti <punchagan@fossee.in>
parents:
diff changeset
    65
::
b595f90016c5 Changed structure of my scripts.
Puneeth Chaganti <punchagan@fossee.in>
parents:
diff changeset
    66
b595f90016c5 Changed structure of my scripts.
Puneeth Chaganti <punchagan@fossee.in>
parents:
diff changeset
    67
    s[1:-1]
b595f90016c5 Changed structure of my scripts.
Puneeth Chaganti <punchagan@fossee.in>
parents:
diff changeset
    68
b595f90016c5 Changed structure of my scripts.
Puneeth Chaganti <punchagan@fossee.in>
parents:
diff changeset
    69
gives the a substring of s, without the first and the last
b595f90016c5 Changed structure of my scripts.
Puneeth Chaganti <punchagan@fossee.in>
parents:
diff changeset
    70
characters. 
b595f90016c5 Changed structure of my scripts.
Puneeth Chaganti <punchagan@fossee.in>
parents:
diff changeset
    71
b595f90016c5 Changed structure of my scripts.
Puneeth Chaganti <punchagan@fossee.in>
parents:
diff changeset
    72
::
b595f90016c5 Changed structure of my scripts.
Puneeth Chaganti <punchagan@fossee.in>
parents:
diff changeset
    73
b595f90016c5 Changed structure of my scripts.
Puneeth Chaganti <punchagan@fossee.in>
parents:
diff changeset
    74
    s = saturday
b595f90016c5 Changed structure of my scripts.
Puneeth Chaganti <punchagan@fossee.in>
parents:
diff changeset
    75
    s[:3]
b595f90016c5 Changed structure of my scripts.
Puneeth Chaganti <punchagan@fossee.in>
parents:
diff changeset
    76
b595f90016c5 Changed structure of my scripts.
Puneeth Chaganti <punchagan@fossee.in>
parents:
diff changeset
    77
Now, we just check if that substring is present in the variable
b595f90016c5 Changed structure of my scripts.
Puneeth Chaganti <punchagan@fossee.in>
parents:
diff changeset
    78
``week``. 
b595f90016c5 Changed structure of my scripts.
Puneeth Chaganti <punchagan@fossee.in>
parents:
diff changeset
    79
b595f90016c5 Changed structure of my scripts.
Puneeth Chaganti <punchagan@fossee.in>
parents:
diff changeset
    80
::
b595f90016c5 Changed structure of my scripts.
Puneeth Chaganti <punchagan@fossee.in>
parents:
diff changeset
    81
b595f90016c5 Changed structure of my scripts.
Puneeth Chaganti <punchagan@fossee.in>
parents:
diff changeset
    82
    s[:3] in week          
b595f90016c5 Changed structure of my scripts.
Puneeth Chaganti <punchagan@fossee.in>
parents:
diff changeset
    83
b595f90016c5 Changed structure of my scripts.
Puneeth Chaganti <punchagan@fossee.in>
parents:
diff changeset
    84
Let us now consider the problem of finding out if a given string is
b595f90016c5 Changed structure of my scripts.
Puneeth Chaganti <punchagan@fossee.in>
parents:
diff changeset
    85
palindromic or not. First of all, a palindromic string is a string
b595f90016c5 Changed structure of my scripts.
Puneeth Chaganti <punchagan@fossee.in>
parents:
diff changeset
    86
that remains same even when it has been reversed.
b595f90016c5 Changed structure of my scripts.
Puneeth Chaganti <punchagan@fossee.in>
parents:
diff changeset
    87
b595f90016c5 Changed structure of my scripts.
Puneeth Chaganti <punchagan@fossee.in>
parents:
diff changeset
    88
Let the string given be ``malayalam``.
b595f90016c5 Changed structure of my scripts.
Puneeth Chaganti <punchagan@fossee.in>
parents:
diff changeset
    89
b595f90016c5 Changed structure of my scripts.
Puneeth Chaganti <punchagan@fossee.in>
parents:
diff changeset
    90
::
b595f90016c5 Changed structure of my scripts.
Puneeth Chaganti <punchagan@fossee.in>
parents:
diff changeset
    91
b595f90016c5 Changed structure of my scripts.
Puneeth Chaganti <punchagan@fossee.in>
parents:
diff changeset
    92
    s = "malayalam"
b595f90016c5 Changed structure of my scripts.
Puneeth Chaganti <punchagan@fossee.in>
parents:
diff changeset
    93
b595f90016c5 Changed structure of my scripts.
Puneeth Chaganti <punchagan@fossee.in>
parents:
diff changeset
    94
Now, we need to compare this string with it's reverse. 
b595f90016c5 Changed structure of my scripts.
Puneeth Chaganti <punchagan@fossee.in>
parents:
diff changeset
    95
b595f90016c5 Changed structure of my scripts.
Puneeth Chaganti <punchagan@fossee.in>
parents:
diff changeset
    96
Again, we will use a technique common to all sequence data-types,
b595f90016c5 Changed structure of my scripts.
Puneeth Chaganti <punchagan@fossee.in>
parents:
diff changeset
    97
[::-1]
b595f90016c5 Changed structure of my scripts.
Puneeth Chaganti <punchagan@fossee.in>
parents:
diff changeset
    98
b595f90016c5 Changed structure of my scripts.
Puneeth Chaganti <punchagan@fossee.in>
parents:
diff changeset
    99
So, we obtain the reverse of s, by simply saying, 
b595f90016c5 Changed structure of my scripts.
Puneeth Chaganti <punchagan@fossee.in>
parents:
diff changeset
   100
b595f90016c5 Changed structure of my scripts.
Puneeth Chaganti <punchagan@fossee.in>
parents:
diff changeset
   101
::
b595f90016c5 Changed structure of my scripts.
Puneeth Chaganti <punchagan@fossee.in>
parents:
diff changeset
   102
b595f90016c5 Changed structure of my scripts.
Puneeth Chaganti <punchagan@fossee.in>
parents:
diff changeset
   103
    s[::-1]
b595f90016c5 Changed structure of my scripts.
Puneeth Chaganti <punchagan@fossee.in>
parents:
diff changeset
   104
b595f90016c5 Changed structure of my scripts.
Puneeth Chaganti <punchagan@fossee.in>
parents:
diff changeset
   105
Now, to check if the string is ``s`` is palindromic, we say
b595f90016c5 Changed structure of my scripts.
Puneeth Chaganti <punchagan@fossee.in>
parents:
diff changeset
   106
::
b595f90016c5 Changed structure of my scripts.
Puneeth Chaganti <punchagan@fossee.in>
parents:
diff changeset
   107
b595f90016c5 Changed structure of my scripts.
Puneeth Chaganti <punchagan@fossee.in>
parents:
diff changeset
   108
    s == s[::-1]
b595f90016c5 Changed structure of my scripts.
Puneeth Chaganti <punchagan@fossee.in>
parents:
diff changeset
   109
b595f90016c5 Changed structure of my scripts.
Puneeth Chaganti <punchagan@fossee.in>
parents:
diff changeset
   110
As, expected, we get ``True``. 
b595f90016c5 Changed structure of my scripts.
Puneeth Chaganti <punchagan@fossee.in>
parents:
diff changeset
   111
b595f90016c5 Changed structure of my scripts.
Puneeth Chaganti <punchagan@fossee.in>
parents:
diff changeset
   112
Now, if the string we are given is ``Malayalam`` instead of
b595f90016c5 Changed structure of my scripts.
Puneeth Chaganti <punchagan@fossee.in>
parents:
diff changeset
   113
``malayalam``, the above comparison would return a False. So, we will
b595f90016c5 Changed structure of my scripts.
Puneeth Chaganti <punchagan@fossee.in>
parents:
diff changeset
   114
have to convert the string to all lower case or all upper case, before
b595f90016c5 Changed structure of my scripts.
Puneeth Chaganti <punchagan@fossee.in>
parents:
diff changeset
   115
comparing. Python provides methods, ``s.lower`` and ``s.upper`` to
b595f90016c5 Changed structure of my scripts.
Puneeth Chaganti <punchagan@fossee.in>
parents:
diff changeset
   116
achieve this. 
b595f90016c5 Changed structure of my scripts.
Puneeth Chaganti <punchagan@fossee.in>
parents:
diff changeset
   117
b595f90016c5 Changed structure of my scripts.
Puneeth Chaganti <punchagan@fossee.in>
parents:
diff changeset
   118
Let's try it out. 
b595f90016c5 Changed structure of my scripts.
Puneeth Chaganti <punchagan@fossee.in>
parents:
diff changeset
   119
::
b595f90016c5 Changed structure of my scripts.
Puneeth Chaganti <punchagan@fossee.in>
parents:
diff changeset
   120
b595f90016c5 Changed structure of my scripts.
Puneeth Chaganti <punchagan@fossee.in>
parents:
diff changeset
   121
   s = "Malayalam"
b595f90016c5 Changed structure of my scripts.
Puneeth Chaganti <punchagan@fossee.in>
parents:
diff changeset
   122
b595f90016c5 Changed structure of my scripts.
Puneeth Chaganti <punchagan@fossee.in>
parents:
diff changeset
   123
   s.upper()
b595f90016c5 Changed structure of my scripts.
Puneeth Chaganti <punchagan@fossee.in>
parents:
diff changeset
   124
b595f90016c5 Changed structure of my scripts.
Puneeth Chaganti <punchagan@fossee.in>
parents:
diff changeset
   125
   s
b595f90016c5 Changed structure of my scripts.
Puneeth Chaganti <punchagan@fossee.in>
parents:
diff changeset
   126
b595f90016c5 Changed structure of my scripts.
Puneeth Chaganti <punchagan@fossee.in>
parents:
diff changeset
   127
   s.lower()
b595f90016c5 Changed structure of my scripts.
Puneeth Chaganti <punchagan@fossee.in>
parents:
diff changeset
   128
b595f90016c5 Changed structure of my scripts.
Puneeth Chaganti <punchagan@fossee.in>
parents:
diff changeset
   129
   s.lower() == s.lower()[::-1]
b595f90016c5 Changed structure of my scripts.
Puneeth Chaganti <punchagan@fossee.in>
parents:
diff changeset
   130
   
b595f90016c5 Changed structure of my scripts.
Puneeth Chaganti <punchagan@fossee.in>
parents:
diff changeset
   131
Note that these methods, do not change the original string, but return
b595f90016c5 Changed structure of my scripts.
Puneeth Chaganti <punchagan@fossee.in>
parents:
diff changeset
   132
a new string.
b595f90016c5 Changed structure of my scripts.
Puneeth Chaganti <punchagan@fossee.in>
parents:
diff changeset
   133
b595f90016c5 Changed structure of my scripts.
Puneeth Chaganti <punchagan@fossee.in>
parents:
diff changeset
   134
a%% %% Pause the video here, and finish the problem of checking if
b595f90016c5 Changed structure of my scripts.
Puneeth Chaganti <punchagan@fossee.in>
parents:
diff changeset
   135
``s`` is a valid name of a day of the week and then resume the
b595f90016c5 Changed structure of my scripts.
Puneeth Chaganti <punchagan@fossee.in>
parents:
diff changeset
   136
video. Change the solution to this problem, to include forms like,
b595f90016c5 Changed structure of my scripts.
Puneeth Chaganti <punchagan@fossee.in>
parents:
diff changeset
   137
SAT, SATURDAY, Saturday and Sat. 
b595f90016c5 Changed structure of my scripts.
Puneeth Chaganti <punchagan@fossee.in>
parents:
diff changeset
   138
b595f90016c5 Changed structure of my scripts.
Puneeth Chaganti <punchagan@fossee.in>
parents:
diff changeset
   139
::
b595f90016c5 Changed structure of my scripts.
Puneeth Chaganti <punchagan@fossee.in>
parents:
diff changeset
   140
b595f90016c5 Changed structure of my scripts.
Puneeth Chaganti <punchagan@fossee.in>
parents:
diff changeset
   141
    s.lower()[:3] in week
b595f90016c5 Changed structure of my scripts.
Puneeth Chaganti <punchagan@fossee.in>
parents:
diff changeset
   142
b595f90016c5 Changed structure of my scripts.
Puneeth Chaganti <punchagan@fossee.in>
parents:
diff changeset
   143
We just convert any input string to lower case and then check if it is
b595f90016c5 Changed structure of my scripts.
Puneeth Chaganti <punchagan@fossee.in>
parents:
diff changeset
   144
present in the list ``week``. 
b595f90016c5 Changed structure of my scripts.
Puneeth Chaganti <punchagan@fossee.in>
parents:
diff changeset
   145
b595f90016c5 Changed structure of my scripts.
Puneeth Chaganti <punchagan@fossee.in>
parents:
diff changeset
   146
Now, let us consider another problem. We often encounter e-mail id's
b595f90016c5 Changed structure of my scripts.
Puneeth Chaganti <punchagan@fossee.in>
parents:
diff changeset
   147
which have @ and periods replaced with text, something like
b595f90016c5 Changed structure of my scripts.
Puneeth Chaganti <punchagan@fossee.in>
parents:
diff changeset
   148
info[at]fossee[dot]in. We now wish to get back proper e-mail
b595f90016c5 Changed structure of my scripts.
Puneeth Chaganti <punchagan@fossee.in>
parents:
diff changeset
   149
addresses.  
b595f90016c5 Changed structure of my scripts.
Puneeth Chaganti <punchagan@fossee.in>
parents:
diff changeset
   150
b595f90016c5 Changed structure of my scripts.
Puneeth Chaganti <punchagan@fossee.in>
parents:
diff changeset
   151
Let's say the variable email has the email address. 
b595f90016c5 Changed structure of my scripts.
Puneeth Chaganti <punchagan@fossee.in>
parents:
diff changeset
   152
::
b595f90016c5 Changed structure of my scripts.
Puneeth Chaganti <punchagan@fossee.in>
parents:
diff changeset
   153
b595f90016c5 Changed structure of my scripts.
Puneeth Chaganti <punchagan@fossee.in>
parents:
diff changeset
   154
   email = "info[at]fossee[dot]in"
b595f90016c5 Changed structure of my scripts.
Puneeth Chaganti <punchagan@fossee.in>
parents:
diff changeset
   155
b595f90016c5 Changed structure of my scripts.
Puneeth Chaganti <punchagan@fossee.in>
parents:
diff changeset
   156
Now, we first replace the ``[at]`` with the ``@``, using the replace
b595f90016c5 Changed structure of my scripts.
Puneeth Chaganti <punchagan@fossee.in>
parents:
diff changeset
   157
method of strings. 
b595f90016c5 Changed structure of my scripts.
Puneeth Chaganti <punchagan@fossee.in>
parents:
diff changeset
   158
::
b595f90016c5 Changed structure of my scripts.
Puneeth Chaganti <punchagan@fossee.in>
parents:
diff changeset
   159
b595f90016c5 Changed structure of my scripts.
Puneeth Chaganti <punchagan@fossee.in>
parents:
diff changeset
   160
   email = email.replace("[at]", "@")
b595f90016c5 Changed structure of my scripts.
Puneeth Chaganti <punchagan@fossee.in>
parents:
diff changeset
   161
   print email
b595f90016c5 Changed structure of my scripts.
Puneeth Chaganti <punchagan@fossee.in>
parents:
diff changeset
   162
b595f90016c5 Changed structure of my scripts.
Puneeth Chaganti <punchagan@fossee.in>
parents:
diff changeset
   163
%%1%% Pause the video here and replace the ``[dot]`` with ``.`` and then
b595f90016c5 Changed structure of my scripts.
Puneeth Chaganti <punchagan@fossee.in>
parents:
diff changeset
   164
resume the video. 
b595f90016c5 Changed structure of my scripts.
Puneeth Chaganti <punchagan@fossee.in>
parents:
diff changeset
   165
b595f90016c5 Changed structure of my scripts.
Puneeth Chaganti <punchagan@fossee.in>
parents:
diff changeset
   166
::
b595f90016c5 Changed structure of my scripts.
Puneeth Chaganti <punchagan@fossee.in>
parents:
diff changeset
   167
b595f90016c5 Changed structure of my scripts.
Puneeth Chaganti <punchagan@fossee.in>
parents:
diff changeset
   168
   email = email.replace("[dot]", ".")        
b595f90016c5 Changed structure of my scripts.
Puneeth Chaganti <punchagan@fossee.in>
parents:
diff changeset
   169
   print email
b595f90016c5 Changed structure of my scripts.
Puneeth Chaganti <punchagan@fossee.in>
parents:
diff changeset
   170
b595f90016c5 Changed structure of my scripts.
Puneeth Chaganti <punchagan@fossee.in>
parents:
diff changeset
   171
b595f90016c5 Changed structure of my scripts.
Puneeth Chaganti <punchagan@fossee.in>
parents:
diff changeset
   172
That brings us to the end of the tutorial. 
b595f90016c5 Changed structure of my scripts.
Puneeth Chaganti <punchagan@fossee.in>
parents:
diff changeset
   173
b595f90016c5 Changed structure of my scripts.
Puneeth Chaganti <punchagan@fossee.in>
parents:
diff changeset
   174
{{{ show summary slide }}}
b595f90016c5 Changed structure of my scripts.
Puneeth Chaganti <punchagan@fossee.in>
parents:
diff changeset
   175
b595f90016c5 Changed structure of my scripts.
Puneeth Chaganti <punchagan@fossee.in>
parents:
diff changeset
   176
In this tutorial, we have learnt how to get substrings, reverse
b595f90016c5 Changed structure of my scripts.
Puneeth Chaganti <punchagan@fossee.in>
parents:
diff changeset
   177
strings and a few useful methods, namely upper, lower and replace. 
b595f90016c5 Changed structure of my scripts.
Puneeth Chaganti <punchagan@fossee.in>
parents:
diff changeset
   178
b595f90016c5 Changed structure of my scripts.
Puneeth Chaganti <punchagan@fossee.in>
parents:
diff changeset
   179
Thank You!