--- a/basic-data-type/script.rst Tue Nov 09 10:56:50 2010 +0530
+++ b/basic-data-type/script.rst Tue Nov 09 14:57:08 2010 +0530
@@ -16,8 +16,6 @@
External Reviewer :
Checklist OK? : <put date stamp here, if OK> [2010-10-05]
-.. #[Puneeth: Fill in pre-requisites.]
-
Hello friends and welcome to the tutorial on Basic Data types and operators
in Python.
@@ -40,13 +38,6 @@
* string
* tuple
-.. #[Puneeth: Use double colon only for code blocks.]
-.. #[Puneeth: include more details in the outline.]
-
-with a little hands-on on how they can be applied to the different data types.
-
-
-
First we will explore python data structures in the domain of numbers.
There are three built-in data types in python to represent numbers.
@@ -58,12 +49,6 @@
* float
* complex
-.. #[Puneeth: Changed to int, float and complex.]
-
-.. #[Puneeth: Loss of consistency. You talk of built-in data types, but
-.. then you were calling them integers, floats and complex. Clean up
-.. required.]
-
Lets first talk about int. ::
a = 13
@@ -78,17 +63,14 @@
type(a)
<type 'int'>
-This means that a is a type of int. Being an int data type in python
-means that there are various functions that this variable has to manipulate
-in different ways. You can explore these by doing,
+This means that a is a type of int. There are lot of functions associated
+with the int datatype, to manipulate it in different ways. These can be
+explored by doing, ::
a.<Tab>
-.. #[Puneeth: Why are we suddenly talking of limits?
-.. Something like this would be better.
-.. int data-type can hold integers of any size. for example - ]
-
*int* datatype can hold integers of any size lets see this by an example.
+::
b = 99999999999999999999
b
@@ -97,11 +79,6 @@
not complain. This is because python's int data-type can hold integers of any
size.
-.. #[Puneeth: again, the clean-up that I talked of above. Decide if you are
-.. talking about the different type of numbers and the datatypes that are
-.. used to represent them or if you are talking of the data-types and what
-.. kind of numbers they represent. I think you should choose the former.]
-
Let us now look at the float data-type.
Decimal numbers in python are represented by the float data-type ::
@@ -109,10 +86,10 @@
p = 3.141592
p
-If you notice the value of output of p isn't exactly equal to p. This is
-because computer saves floating point values in a specific format. There is
-always an aproximationation. This is why we should never rely on equality
-of floating point numbers in a program.
+If you notice the value of output of ``p`` isn't exactly equal to ``p``.
+This is because computer saves floating point values in a specific format.
+There is always an approximation. This is why we should never rely on
+equality of floating point numbers in a program.
The last data type in the list is complex number ::
@@ -120,7 +97,7 @@
as simple as that so essentialy its just a combination of two floats the
imaginary part being defined by j notation instead of i. Complex numbers
-have a lot of functions specific to them. Lets check these ::
+have a lot of functions specific to them. Let us look at these ::
c.<Tab>
@@ -174,10 +151,6 @@
The results are self explanatory.
-.. #[Puneeth: Why does booleans bring us to precedence? I don't see the
-.. connection. Am I missing something?]
-
-
What if you want to apply one operator before another.
Well you can use parenthesis for precedence.
@@ -189,8 +162,6 @@
c=True
-.. #[Puneeth: Consistency. In[]: is not present at other places.]
-
To check how precedence changes with parenthesis, we will try two
expressions and their evaluation.
@@ -210,14 +181,12 @@
Let's now look at some operators available in Python to manipulate
these data types.
-.. #[Puneeth: A mention of other operators would be good? Starting
-.. with % and ** is a bit weird.]
-
Python uses '+' for addition ::
23 + 74
'-' for subtraction ::
+
23 - 56
'*' for multiplication ::
@@ -264,26 +233,26 @@
a=a/23
-Following is an (are) exercise(s) that you must do.
+Following is are exercises that you must do.
%% %% Using python find sqaure root of 3?
+
+%% %% Is 3**1/2 and 3**0.5 same
+
+Please, pause the video here. Do the exercises and then continue.
+
::
3**0.5
-%% %% Is 3**1/2 and 3**0.5 same
::
No,One gives an int answer and the other float
-Please, pause the video here. Do the exercises and then continue.
-
Lets now discuss sequence data types in Python. Sequence data types
are those in which elements are kept in a sequential order and all the
elements are accessed using index numbers.
-.. #[Puneeth: fix the last sentence - it sounds incomplete]
-
{{{ slide introducing sequence datatype }}}
The sequence datatypes in Python are ::
@@ -310,8 +279,6 @@
var_list = [1, 1.2, [1,2]]
var_list
-.. #[Puneeth: some continuity, when jumping to strings?]
-
Lets look at another sequence data type, strings
type ::
@@ -329,12 +296,8 @@
l="Let's see how to include a single quote"
m='''"Let's see how to include both"'''
-.. #[Puneeth: Contain's? That's not a word!]
-
As you can see, single quotes are used as delimiters usually.
-.. #[Puneeth: Thus?]
-
When a string contains a single quote, double quotes are used as
delimiters. When a string quote contains both single and double quotes,
triple quotes are used as delimiters.
@@ -403,10 +366,8 @@
sorted(num_list)
-As a consequence of there order we can access a group of elements
-in a sequence,together. This is called slicing and striding.
-
-.. #[Puneeth: Fix the sentence above. ]
+As a consequence of their order, we can access a group of elements in a
+sequence, together. This is called slicing and striding.
First lets discuss Slicing,
@@ -563,8 +524,8 @@
Please, pause the video here. Do the exercise(s) and then continue.
-
-In this tutorial we have discussed
+This brings us to the end of the tutorial. In this tutorial we have
+discussed
1. Number Datatypes , integer,float and complex
2. Boolean and datatype and operators
@@ -574,16 +535,6 @@
6. Finding length , sorting and reversing operations on sequences.
7. Immutability.
-
-
-
-.. #[Nishanth]: string to list is fine. But list to string can be left for
- string manipulations. Just say it requires some string
- manipulations and leave it there.
-
-.. #[Nishanth]: Where is the summary
- There are no exercises in the script
-
{{{ Show the "sponsored by FOSSEE" slide }}}
This tutorial was created as a part of FOSSEE project, NME ICT, MHRD India