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This module will expand your knowledge of tuples by teaching you about nesting tuples within other tuples.

Table of contents

Preface

This module is one in a collection of modules on Python designed for teaching ITSE 1359 Introduction to Scripting Languages: Python at Austin Community College in Austin, TX.

Viewing tip

I recommend that you open another copy of this module in a separate browser window and use the following links to easily find and view the Figuresand Listings while you are reading about them.

(Note to blind and visually impaired students: most of the Figures all of the Listings in this module are presented in plain text format and should be accessible using anaudio screen reader or a braille display.)

Figures

  • Figure 1 . Output from the code in Listing 1.
  • Figure 2 . Output from the code in Listing 2.
  • Figure 3 . Output from the code in Listing 3.
  • Figure 4 . Output from the code in Listing 4.
  • Figure 5 . Visualization of the tuples

Listings

Introduction

Previous modules have introduced you to lists, subscriptions, sequences, mutable sequences, mappings, slicings, and tuples.

The earlier module titled Itse1359-1100-Indexing and Slicing Tuples showed you:

  • How to create a tuple.
  • How to access a tuple item using indexing.
  • How to slice a tuple.

This module will expand your knowledge of tuples by teaching you about nesting tuples within other tuples.

What is a tuple ?

To briefly repeat part of what you learned in the earlier module, a tuple is like a list whose values cannot be modified. In other words, a tuple is immutable.

  • Tuples are normally written as a sequence of items contained in (optional) matching parentheses.
  • A tuple is an immutable sequence.
  • Items in a tuple are accessed using a numeric index.

Tuples can contain other compound objects, including lists, dictionaries, and other tuples. Hence, tuples can be nested inside of other tuples.

Sample program

Listing 4 shows a complete listing of a Python program that

  • Creates two tuples.
  • Nests them in a third tuple.
  • Determines the length (number of items) in the tuple containing the two nested tuples.
  • Prints various items of information along the way.

A visualization of the tuples in this program is provided in Figure 5 .

Create two tuples

The beginning of the program is shown in Listing 1 .

Listing 1 . Beginning of the program.
# Illustrates creating and displaying nested tuples #--------------------------------------------------print("Create/print one tuple") t1 = 1,2print(t1) print("Create/print another tuple")t2 = "a","b" print(t2)

The code in Listing 1 creates and displays the two tuples.

Figure 1 shows the output produced by the code fragment in Listing 1 .

Figure 1 . Output from the code in Listing 1.
Create/print one tuple (1, 2)Create/print another tuple ('a', 'b')

Questions & Answers

Do somebody tell me a best nano engineering book for beginners?
s. Reply
what is fullerene does it is used to make bukky balls
Devang Reply
are you nano engineer ?
s.
what is the Synthesis, properties,and applications of carbon nano chemistry
Abhijith Reply
so some one know about replacing silicon atom with phosphorous in semiconductors device?
s. Reply
Yeah, it is a pain to say the least. You basically have to heat the substarte up to around 1000 degrees celcius then pass phosphene gas over top of it, which is explosive and toxic by the way, under very low pressure.
Harper
how to fabricate graphene ink ?
SUYASH Reply
for screen printed electrodes ?
SUYASH
What is lattice structure?
s. Reply
of graphene you mean?
Ebrahim
or in general
Ebrahim
in general
s.
Graphene has a hexagonal structure
tahir
On having this app for quite a bit time, Haven't realised there's a chat room in it.
Cied
what is biological synthesis of nanoparticles
Sanket Reply
what's the easiest and fastest way to the synthesize AgNP?
Damian Reply
China
Cied
types of nano material
abeetha Reply
I start with an easy one. carbon nanotubes woven into a long filament like a string
Porter
many many of nanotubes
Porter
what is the k.e before it land
Yasmin
what is the function of carbon nanotubes?
Cesar
I'm interested in nanotube
Uday
what is nanomaterials​ and their applications of sensors.
Ramkumar Reply
what is nano technology
Sravani Reply
what is system testing?
AMJAD
preparation of nanomaterial
Victor Reply
Yes, Nanotechnology has a very fast field of applications and their is always something new to do with it...
Himanshu Reply
good afternoon madam
AMJAD
what is system testing
AMJAD
what is the application of nanotechnology?
Stotaw
In this morden time nanotechnology used in many field . 1-Electronics-manufacturad IC ,RAM,MRAM,solar panel etc 2-Helth and Medical-Nanomedicine,Drug Dilivery for cancer treatment etc 3- Atomobile -MEMS, Coating on car etc. and may other field for details you can check at Google
Azam
anybody can imagine what will be happen after 100 years from now in nano tech world
Prasenjit
after 100 year this will be not nanotechnology maybe this technology name will be change . maybe aftet 100 year . we work on electron lable practically about its properties and behaviour by the different instruments
Azam
name doesn't matter , whatever it will be change... I'm taking about effect on circumstances of the microscopic world
Prasenjit
how hard could it be to apply nanotechnology against viral infections such HIV or Ebola?
Damian
silver nanoparticles could handle the job?
Damian
not now but maybe in future only AgNP maybe any other nanomaterials
Azam
Hello
Uday
I'm interested in Nanotube
Uday
this technology will not going on for the long time , so I'm thinking about femtotechnology 10^-15
Prasenjit
can nanotechnology change the direction of the face of the world
Prasenjit Reply
At high concentrations (>0.01 M), the relation between absorptivity coefficient and absorbance is no longer linear. This is due to the electrostatic interactions between the quantum dots in close proximity. If the concentration of the solution is high, another effect that is seen is the scattering of light from the large number of quantum dots. This assumption only works at low concentrations of the analyte. Presence of stray light.
Ali Reply
how did you get the value of 2000N.What calculations are needed to arrive at it
Smarajit Reply
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Source:  OpenStax, Itse 1359 introduction to scripting languages: python. OpenStax CNX. Jan 22, 2016 Download for free at https://legacy.cnx.org/content/col11713/1.32
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