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Diffstat (limited to 'basic-data-type/script.rst')
| -rw-r--r-- | basic-data-type/script.rst | 89 |
1 files changed, 20 insertions, 69 deletions
diff --git a/basic-data-type/script.rst b/basic-data-type/script.rst index 3dc92b4..22d4f3a 100644 --- a/basic-data-type/script.rst +++ b/basic-data-type/script.rst @@ -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 @@ In this tutorial, we shall look at * 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 @@ These are: * 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 @@ If we now see :: 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 @@ As you can see even when we put a value of 9 repeated 20 times python did 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 @@ Decimal numbers in python are represented by the float data-type :: 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 @@ The last data type in the list is complex number :: 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 @@ You can apply different Boolean operations on t now for example :: 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 @@ Lets write some piece of code to check this out.:: 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 @@ gives the value False. 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 @@ is same as :: 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 @@ We can have a list something like :: 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 @@ Python strings can actually be defined in three different ways :: 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 @@ Get a sorted list :: 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 @@ it is change it to 21. 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 @@ In this tutorial we have discussed 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 |