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Avoiding the quote problem

Because this is such a common problem, and because the escape solution is so ugly and difficult to read, Python gives us another way to deal withquotes inside of quotes. This solution, shown in Figure 6 , is the use of single and double quotes in combination.

Figure 6 . Avoiding the quote problem.
>>>print('Richard "Dick" Baldwin') Richard "Dick" Baldwin>>>

In Python, double quotes can be included directly in strings that are surrounded by single quotes, and single quotes can be included directly instrings that are surrounded by double quotes. This is much easier to read than the solution that requires you to place a lot of backslash characters insideyour string.

List of escape sequences

Escape sequences are a staple of modern computer programming and there is a lot of consistency from one language to the next. A list of the escape sequencesthat are honored by Python 3 is available in the Python Language Reference -- 2.4.1. String and Bytes literals .

More ways to span lines

Just when you thought that you had seen it all, I am going to show you three more ways (two new and one not so new) to span multiple lines with strings. One of them is shown in Figure 7 .

End the line with a backslash

Figure 7 . End the line with a backslash.
>>>print("Richard \ Baldwin")Richard Baldwin>>>

As shown in Figure 7 , the use of a backslash at the end of the line makes it possible to continue the string on anew line. However, the backslash is not included in the output, and there is no newline character in the output.

Not restricted to strings

The backslash can be used at the end of a line to cause that line to be continued on the next line whether inside a string or not. This isillustrated in the review module following this module.

A form of concatenation

When used in this way with a string, the backslash at the end of the line becomes a form of string concatenation. The portions of the strings on each ofthe input lines are concatenated to produce a single line containing both parts of the string in the output.

I will have more to say about string concatenation later in this module.

Use the \n escape sequence

This isn't really new, but it so important that I decided to repeat it here for emphasis. As shown in Figure 8 , the inclusion of "\n" inside the string caused the cursor to advance to a new line following my first name and printedmy last name on the new line.

Figure 8 . Use the \n escape sequence.
>>>print("Richard \nBaldwin") RichardBaldwin>>>

This is the common form of the newline escape sequence typically used in C, C++, and Java.

Combine backslash and \n

The code in Figure 9 shows how to combine the backslash at the end of the line with a newline character placedthere to cause the output to closely resemble the input.

Figure 9 . Combine backslash and \n.
>>>print("Richard \n\ Baldwin")Richard Baldwin>>>

String concatenation

To concatenate two strings means to hook them together end-to-end, thus producing a new string that is the combination of the two.

Literal string concatenation

You can cause literal strings to be concatenated just by writing one adjacent to the other as shown in Figure 10 .

Questions & Answers

how to know photocatalytic properties of tio2 nanoparticles...what to do now
Akash Reply
it is a goid question and i want to know the answer as well
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 ?
what is the Synthesis, properties,and applications of carbon nano chemistry
Abhijith Reply
Mostly, they use nano carbon for electronics and for materials to be strengthened.
is Bucky paper clear?
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.
Do you know which machine is used to that process?
how to fabricate graphene ink ?
for screen printed electrodes ?
What is lattice structure?
s. Reply
of graphene you mean?
or in general
in general
Graphene has a hexagonal structure
On having this app for quite a bit time, Haven't realised there's a chat room in it.
what is biological synthesis of nanoparticles
Sanket Reply
what's the easiest and fastest way to the synthesize AgNP?
Damian Reply
types of nano material
abeetha Reply
I start with an easy one. carbon nanotubes woven into a long filament like a string
many many of nanotubes
what is the k.e before it land
what is the function of carbon nanotubes?
I'm interested in nanotube
what is nanomaterials​ and their applications of sensors.
Ramkumar Reply
what is nano technology
Sravani Reply
what is system testing?
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
what is system testing
what is the application of nanotechnology?
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
anybody can imagine what will be happen after 100 years from now in nano tech world
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
name doesn't matter , whatever it will be change... I'm taking about effect on circumstances of the microscopic world
how hard could it be to apply nanotechnology against viral infections such HIV or Ebola?
silver nanoparticles could handle the job?
not now but maybe in future only AgNP maybe any other nanomaterials
I'm interested in Nanotube
this technology will not going on for the long time , so I'm thinking about femtotechnology 10^-15
can nanotechnology change the direction of the face of the world
Prasenjit 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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