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| -rw-r--r-- | basic_datatypes_and_operators/script.rst | 109 |
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diff --git a/basic_datatypes_and_operators/script.rst b/basic_datatypes_and_operators/script.rst index 09f586b..b94c3a6 100644 --- a/basic_datatypes_and_operators/script.rst +++ b/basic_datatypes_and_operators/script.rst @@ -27,8 +27,8 @@ team along with the logo of MHRD }}} .. R1 -Hello friends and welcome to the tutorial on -'Basic Data types and operators' in Python. +Hello friends and welcome to the tutorial on 'Basic Data types and operators' +in Python. .. L2 @@ -101,9 +101,9 @@ If we now see .. R8 -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, +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, .. L8 :: @@ -112,8 +112,7 @@ These can be explored by doing, .. R9 -*int* datatype can hold integers of any size lets see this by an -example. +*int* datatype can hold integers of any size lets see this by an example. .. L9 :: @@ -123,9 +122,9 @@ example. .. R10 -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. +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. Let us now look at the float data-type. Decimal numbers in python are represented by the float data-type @@ -138,10 +137,10 @@ Decimal numbers in python are represented by the float data-type .. R11 -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. +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 @@ -153,9 +152,8 @@ The last data type in the list is complex number .. R12 it's 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. Let us look at -some of these functions. +imaginary part being defined by j notation instead of i. Complex numbers +have a lot of functions specific to them. Let us look at these .. L12 :: @@ -371,9 +369,9 @@ and two stars for a exponent. .. R33 -In case one wishes to use the current value of variable in which the -result is stored in the expression, one can do that by putting the -operator before `equal to`. +In case one wishes to use the current value of variable in which the result +is stored in the expression, one can do that by putting the operator before +`equal to`. .. L33 :: @@ -404,6 +402,7 @@ and is same as .. L36 + :: a=a/23 @@ -456,8 +455,8 @@ Let us try both these operations. .. R42 -As you can see,the first operation gives an integer,whereas the second -one gives a float. +As you can see,the first operation gives an integer, +whereas the second one gives a float. Hence,though both mean the same,they give different outputs. Let us now discuss sequence data types in Python. Sequence data types @@ -478,8 +477,8 @@ The sequence datatypes in Python are * string * tuple -The list type is a container that holds a number of other objects, in -the given order. +The list type is a container that holds a number of other objects, in the +given order. .. R44 @@ -501,11 +500,13 @@ Lists can store data of any type in them. We can have a list something like .. L45 + :: - var_list = [1, 1.2, [1,2]] + var_list = [1, 1.2, [1,2]] var_list + .. R46 Lets look at another sequence data type, strings @@ -566,9 +567,9 @@ They can be accessed using index numbers .. R50 -Indexing starts from 0, from left to right and from -1 when accessing -lists in reverse. Thus num_list[2] refers to the third element 3. and -greetings [-2] is the second element from the end , that is 'l'. +Indexing starts from 0, from left to right and from -1 when accessing lists +in reverse. Thus num_list[2] refers to the third element 3. and greetings +[-2] is the second element from the end , that is 'l'. Addition gives a new sequence containing both sequences @@ -652,8 +653,8 @@ For this we can do .. R57 The syntax for slicing is, sequence variable name, square bracket, first -element index, colon, second element index. The last element however is -not included in the resultant list +element index, colon, second element index. The last element however is not +included in the resultant list .. L57 :: @@ -687,13 +688,13 @@ Let us see an example .. R60 -The, colon two, added in the end signifies all the alternate elements. -This is why we call this concept striding because we move through the -list with a particular stride or step. The step in this example being 2. +The, colon two, added in the end signifies all the alternate elements. This +is why we call this concept striding because we move through the list with +a particular stride or step. The step in this example being 2. We have talked about many similar features of lists, strings and tuples. -But there are many important features in lists that differ from strings -and tuples. Lets see this by example. +But there are many important features in lists that differ from strings and +tuples. Lets see this by example. .. L60 :: @@ -703,8 +704,8 @@ and tuples. Lets see this by example. .. R61 -As you can see while the first command executes with out a problem there -is an error on the second one. +As you can see while the first command executes with out a problem there is +an error on the second one. Now lets try @@ -719,9 +720,9 @@ Its the same error. This is because strings and tuples share the property of being immutable. We cannot change the value at a particular index just by assigning a new value at that position. -We have looked at different types but we need to convert one data type -into another. Well lets one by one go through methods by which we can -convert one data type to other +We have looked at different types but we need to convert one data type into +another. Well lets one by one go through methods by which we can convert +one data type to other .. L62 :: @@ -732,8 +733,8 @@ convert one data type to other .. R63 -Python has built in functions int, float and complex to convert one -number type data structure to another. +Python has built in functions int, float and complex to convert one number +type data structure to another. .. L63 :: @@ -744,8 +745,8 @@ number type data structure to another. .. R64 -As you can see the decimal part of the number is simply stripped to get -the integer. +As you can see the decimal part of the number is simply stripped to get the +integer. .. L64 :: @@ -756,8 +757,8 @@ the integer. .. R65 -In case of complex number to floating point only the real value of -complex number is taken. +In case of complex number to floating point only the real value of complex +number is taken. Similarly we can convert list to tuple and tuple to list @@ -784,8 +785,8 @@ interesting problem. Let's say we have a string .. R67 -This produces a list with the string split at whitespace. Similarly we -can split on some other character. +This produces a list with the string split at whitespace. Similarly we can +split on some other character. .. L67 :: @@ -902,8 +903,7 @@ learnt to, #. Know the boolean datatype and operators -- +, *, /, **, % . #. use the sequence data types -- List,String and Tuple. #. Slice sequences by using the row and column numbers. -#. Split and join a list using ``split()`` and ``join()`` function - respectively. +#. Split and join a list using ``split()`` and ``join()`` function respectively. #. Convert to string to tuple and vice-versa. .. L79 @@ -929,11 +929,11 @@ Here are some self assessment questions for you to solve And the answers, -1. The major diffence between tuples and lists is that Tuples are - immutable while lists are not. +1. The major diffence between tuples and lists is that + Tuples are immutable while lists are not. -2. To split the string on whitespace, we use the function `` split`` - without any argument +2. To split the string on whitespace, we use the function + `` split`` without any argument :: string.split() @@ -946,4 +946,3 @@ And the answers, Hope you have enjoyed this tutorial and found it useful. Thank You. - |