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Small core, large library

Like Java, Python has a small compact core and a large, extensible library . Thus, much of what you will need to do has already been written and tested for you. Yourtask will be to write the code to glue those library components together, and to write new capabilities on an as-needed basis.

Let's Write a Program

Getting ready

Download and install the software

The first step is to go to (External Link) with your web browser. Download, and install the Python software using thedownload link that you will find there.

I'm going to assume that either you already know how to do this, or you can get help from a friend. In other words, I'm not going to try to explain how todownload and install the Python software.

Note: If you are working in an ACC computer lab on the Northridge campus, you don't need to download and install the Python software. It hasalready been installed. If you are working in an ACC computer lab on a different campus and you don't find the Python software, ask the lab manager to downloadand install it. If you are working on your computer at home, at some point you will need to download and install the Python software.

Starting the programming environment

As I mentioned earlier, all of my instructions will be based on the use of Python running on my Windows operating system.

However, as I also mentioned earlier, you have many choices for using Python. If you are running on some other platform, you will need to translate my instructionsfrom Windows jargon into the jargon of your platform.

Enough talk -- let's begin

Find the Start button on the task bar on your Windows desktop. Select

Start/All Programs/Python x.y

where x.y is the version of Python that you have downloaded and installed. At the time of this writing, I have version 3.4.1 installed on my computer, and theselection shows on the menu as Python 3.4.

What do you see?

When you make this selection, you should see a menu having at least the following five options :

  • IDLE (Python GUI)
  • Module Docs
  • Python (command line)
  • Python Manuals
  • Uninstall Python

The Python Manuals

Don't be bashful about selecting and reading the Module Docs and the Python Manuals. There is a wealth of information contained there, including a tutorial.

The library reference

A good way to get a feel for the breadth and power of Python is to select Python Manuals from the menu and then select the Library Reference link. (The Library Reference is also available online as of the time of this writing.)

Most of what you see there probably won't mean much to you at this point in time, but hopefully will be familiar territory after you complete this course.

IDLE (Python GUI)

Selecting IDLE (Python GUI) from the menu brings up a window titled "Python 3.4.1 Shell" on my computer. This is one of the interactive programming environments available with Python on MicrosoftWindows.

What does it look like ?

When you select IDLE (Python GUI) from the menu, you should see something like Figure 1 .

(Note to blind and visually impaired students: I don't know if you will find the Python Shell to be accessible. If not, don't worry. We will get to acommand-line version that should be accessible a little later.)

Questions & Answers

find the 15th term of the geometric sequince whose first is 18 and last term of 387
Jerwin Reply
The given of f(x=x-2. then what is the value of this f(3) 5f(x+1)
virgelyn Reply
hmm well what is the answer
Abhi
how do they get the third part x = (32)5/4
kinnecy Reply
can someone help me with some logarithmic and exponential equations.
Jeffrey Reply
sure. what is your question?
ninjadapaul
20/(×-6^2)
Salomon
okay, so you have 6 raised to the power of 2. what is that part of your answer
ninjadapaul
I don't understand what the A with approx sign and the boxed x mean
ninjadapaul
it think it's written 20/(X-6)^2 so it's 20 divided by X-6 squared
Salomon
I'm not sure why it wrote it the other way
Salomon
I got X =-6
Salomon
ok. so take the square root of both sides, now you have plus or minus the square root of 20= x-6
ninjadapaul
oops. ignore that.
ninjadapaul
so you not have an equal sign anywhere in the original equation?
ninjadapaul
hmm
Abhi
is it a question of log
Abhi
🤔.
Abhi
Commplementary angles
Idrissa Reply
hello
Sherica
im all ears I need to learn
Sherica
right! what he said ⤴⤴⤴
Tamia
hii
Uday
what is a good calculator for all algebra; would a Casio fx 260 work with all algebra equations? please name the cheapest, thanks.
Kevin Reply
a perfect square v²+2v+_
Dearan Reply
kkk nice
Abdirahman Reply
algebra 2 Inequalities:If equation 2 = 0 it is an open set?
Kim Reply
or infinite solutions?
Kim
The answer is neither. The function, 2 = 0 cannot exist. Hence, the function is undefined.
Al
y=10×
Embra Reply
if |A| not equal to 0 and order of A is n prove that adj (adj A = |A|
Nancy Reply
rolling four fair dice and getting an even number an all four dice
ramon Reply
Kristine 2*2*2=8
Bridget Reply
Differences Between Laspeyres and Paasche Indices
Emedobi Reply
No. 7x -4y is simplified from 4x + (3y + 3x) -7y
Mary Reply
how do you translate this in Algebraic Expressions
linda Reply
Need to simplify the expresin. 3/7 (x+y)-1/7 (x-1)=
Crystal Reply
. After 3 months on a diet, Lisa had lost 12% of her original weight. She lost 21 pounds. What was Lisa's original weight?
Chris 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
the Beer law works very well for dilute solutions but fails for very high concentrations. why?
bamidele 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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