--- a/getting-started-strings.rst Wed Oct 13 17:32:23 2010 +0530
+++ /dev/null Thu Jan 01 00:00:00 1970 +0000
@@ -1,125 +0,0 @@
-Hello friends. Welcome to this spoken tutorial on Getting started with
-strings.
-
-{{{ Show the slide containing the title }}}
-
-{{{ Show the slide containing the outline }}}
-
-In this tutorial, we will learn what do we actually mean by strings in
-python, how python supports the use of strings. We will also learn
-some of the operations that can be performed on strings.
-
-{{{ Shift to terminal and start ipython }}}
-
-To begin with let us start ipython, by typing::
-
- ipython
-
-on the terminal
-
-So what are strings? In Python anything within either single quotes
-or double quotes or triple single quotes or triple double quotes are
-strings. This is true whatsoever, even if there is only one character
-within the quotes
-
-{{{ Type in ipython the following and read them as you type }}}::
-
- 'This is a string'
- "This is a string too'
- '''This is a string as well'''
- """This is also a string"""
- 'p'
-
-Having more than one control character to define strings come as very
-handy when one of the control characters itself is part of the
-string. For example::
-
- "Python's string manipulation functions are very useful"
-
-In this case we use single quote for apostrophe. If we had only single
-quote to define strings we should have a clumsy way of escaping the
-single quote character to make it part of the string. Hence this is a
-very handy feature.
-
-The triple quoted strings let us define multi-lines strings without
-using any escaping. Everything within the triple quotes is a single
-string no matter how many lines it extends::
-
- """Having more than one control character to define
- strings come as very handy when one of the control
- characters itself is part of the string."""
-
-We can assign this string to any variable::
-
- a = 'Hello, World!'
-
-Now 'a' is a string variable. String is a collection of characters. In
-addition string is an immutable collection. So all the operations that
-are applicable to any other immutable collection in Python works on
-string as well. So we can add two strings::
-
- a = 'Hello'
- b = 'World'
- c = a + ', ' + b + '!'
-
-We can add string variables as well as the strings themselves all in
-the same statement. The addition operation performs the concatenation
-of two strings.
-
-Similarly we can multiply a string with an integer::
-
- a = 'Hello'
- a * 5
-
-gives another string in which the original string 'Hello' is repeated
-5 times.
-
-Since strings are collections we can access individual items in the
-string using the subscripts::
-
- a[0]
-
-gives us the first character in the string. The indexing starts from 0
-for the first character up to n-1 for the last character. We can
-access the strings from the end using negative indices::
-
- a[-2]
-
-gives us second element from the end of the string
-
-Let us attempt to change one of the characters in a string::
-
- a = 'hello'
- a[0] = 'H'
-
-As said earlier, strings are immutable. We cannot manipulate the
-string. Although there are some methods which let us to manipulate the
-strings. We will look at them in the advanced session on strings. In
-addition to the methods that let us manipulate the strings we have
-methods like split which lets us break the string on the specified
-separator, the join method which lets us combine the list of strings
-into a single string based on the specified separator.
-
-{{{ Show summary slide }}}
-
-This brings us to the end of another session. In this tutorial session
-we learnt
-
- * How to define strings
- * Different types of defining a string
- * String concatenation and repeatition
- * Accessing individual elements of the string
- * Immutability of strings
-
-{{{ Show the "sponsored by FOSSEE" slide }}}
-
-This tutorial was created as a part of FOSSEE project, NME ICT, MHRD India
-
-Hope you have enjoyed and found it useful.
-Thankyou
-
-.. Author : Madhu
- Internal Reviewer 1 : [potential reviewer: Nishanth]
- Internal Reviewer 2 : [potential reviewer: Amit]
- External Reviewer :
-