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diff --git a/tuples/script.rst b/tuples/script.rst index 23d88b2..297c90f 100644 --- a/tuples/script.rst +++ b/tuples/script.rst @@ -21,62 +21,123 @@ Script ------ -Hello friends and welcome to the tutorial on getting started with -tuples. +.. L1 -{{{ Show the slide containing title }}} +{{{ Show the first slide containing title, name of the production +team along with the logo of MHRD }}} -{{{ Show the slide containing the outline slide }}} +.. R1 -In this tutorial, we shall learn +Hello friends and welcome to the tutorial on "getting started with +tuples". - * what are tuples - * their similarities and dissimilarities with lists - * why are they needed +.. L2 + +{{{ Show the slide containing the objectives }}} + +.. R2 + +At the end of the tutorial, you will be able to, + + 1. Understand of what tuples are. + #. Compare them with lists. + #. Know why they are needed and where to use them. + +.. L3 + +{{{ Switch to the pre-requisite slide }}} + +.. R3 + +Before beginning this tutorial,we would suggest you to complete the +tutorial on "Getting started with lists". + +.. R4 + +Let us start our ipython interpreter. + +.. L4 + +{{{ Open the terminal }}} +:: + + ipython + +.. R5 Let's get started by defining a tuple. A tuple is defined by enclosing parentheses around a sequence of items seperated by commas. It is similar to defining a list except that parentheses are used instead of square brackets. + +.. L5 :: t = (1, 2.5, "hello", -4, "world", 1.24, 5) t -defines a tuple. The items in the tuple are indexed using numbers and can be -accessed by using their position. +.. R6 + +The items in the tuple are indexed using numbers and can be +accessed by using their position.For example, + +.. L6 :: t[3] -prints -4 which is the fourth item of the tuple. +.. R7 +It prints -4 which is the fourth item of the tuple +Similarly, + +.. L7 :: t[1:5:2] -prints the corresponding slice +.. R8 + +It prints the corresponding slice -This is the behaviour similar as to lists. But the difference can be seen when -we try to change an element in the tuple. +This behaviour is similar to that of lists. But the difference can be +seen when we try to change an element in the tuple. + +.. L8 :: t[2] = "Hello" -We can see that, it raises an error saying tuple does not support item -assignment. Tuples are immutable, and cannot be changed after +.. R9 + +We can see that, it raises an error saying 'tuple object does not support +item assignment'. Tuples are immutable, and hence cannot be changed after creation. -Then, what's the use of tuples? +Then, what is the use of tuples? +We shall understand that soon. But let us look at a simple problem of +swapping values. + +Pause the video here, try out the following exercise and resume the video. + +.. L9 -We shall understand that soon. But let us look at a simple problem of swapping -values. +.. L10 -{{{ Pause here and try out the following exercises }}} +{{{ Show slide with exercise 1 }}} -%% 1 %% a = 5 and b = 7. swap the values of a and b +.. R10 + + Given, a = 5 and b = 7. Swap the values of a and b. + +.. R11 + +Switch to terminal fo solution + +.. L11 {{{ continue from paused state }}} +{{{ Switch to the terminal }}} :: a = 5 @@ -85,7 +146,11 @@ values. a b -We define the two values +.. R12 + +We now create a variable say, temp and swap the values using this variable + +.. L12 :: temp = a @@ -95,9 +160,12 @@ We define the two values a b -This is the traditional approach +.. R13 +This is the traditional approach Now let us do it the python way + +.. L13 :: a @@ -108,64 +176,125 @@ Now let us do it the python way a b +.. R14 + We see that the values are swapped. This idiom works for different data-types also. +.. L14 :: a = 2.5 b = "hello" - + a, b = b, a a b +.. R15 + Moreover this type of behaviour is something that feels natural and you'd expect to happen. -This is possible because of the immutability of tuples. This process is called -tuple packing and unpacking. +This is possible because of the immutability of tuples. This process is +called tuple packing and unpacking. Let us first see what is tuple packing. Type + +.. L15 :: 5, +.. R16 + What we see is a tuple with one element. + +.. L16 :: 5, "hello", 2.5 +.. R17 + Now it is a tuple with three elements. -So when we are actually typing two or more elements seperated by commas, those -elements are packed into a tuple. +So when we are actually typing two or more elements seperated by commas, +those elements are packed into a tuple. When you type -:: a, b = b, a -First the values of b and a are packed into a tuple on the right side and then -unpacked into the variables a and b. +First the values of b and a are packed into a tuple on the right side +and then unpacked into the variables a and b. Immutability of tuples ensures that the values are not changed during the packing and unpacking. +.. L17 + +.. L18 + {{{ Show summary slide }}} -This brings us to the end of the tutorial. -we have learnt +.. R18 + +This brings us to the end of this tutorial.In this tutorial, +we have learnt to, + + 1. Define tuples. + #. Understand the similarities of tuples with lists, like indexing and + iterability. + #. Know about the immutability of tuples. + #. Swap values, the python way. + #. Understand the concept of packing and unpacking of tuples. + +.. L19 + +{{{Show self assessment questions slide}}} + +.. R19 + +Here are some self assessment questions for you to solve + +1. Define a tuple containing two values. The first being integer 4 and + second is a float 2.5 + +2. If ``a = 5,`` then what is the type of a ? + + - int + - float + - tuple + - string + +3. if ``a = (2, 3)``. What does ``a[0], a[1] = (3, 4)`` produce + +.. L20 + +{{{solution of self assessment questions on slide}}} + +.. R20 + +And the answers, + +1. A tuple is defined by enclosing parentheses around a sequence of + items seperated by commas.Hence, we write our tuple as, +:: + + (4, 2.5) + +2. Since the given data is 5 followed by a comma, it means that it is + a tuple + +3. The operation a[0], a[1] = (3, 4) will result in an error because + tuples are immutable. - * How to define tuples - * The similarities of tuples with lists, like indexing and iterability - * The immutability of tuples - * The value swapping idiom in Python - * packing and unpacking of tuples +.. L21 -{{{ Show the "sponsored by FOSSEE" slide }}} +{{{ Show the thankyou slide }}} -This tutorial was created as a part of FOSSEE project, NME ICT, MHRD India +.. R21 -Hope you have enjoyed and found it useful. -Thank you +Hope you have enjoyed this tutorial and found it useful. +Thank you! |