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In triple-quoted strings, unescaped newlines and quotes are allowed (and are retained), except that three unescaped quotes in a row terminate thestring. (A "quote" is the character used to open the string, i.e. either ' or".)

When I pressed the Enter key as described above , I entered an unescaped newline .

One of the main advantages of using triple-quoted strings is that this makes it possible to

  • Deal with strings that occupy more than one line.
  • Deal with all of the lines that make up the string as a unit.
  • Preserve newline characters that separate the lines in the process.

This is illustrated in Figure 3 , which shows my name, surrounded by matching triple quotes and split onto twoconsecutive lines of input.

Figure 3 . Triple-quoted strings with newlines.
>>>"""Dick Baldwin"""'Dick\nBaldwin'>>>

The newline (\n) character

When this triple quoted, multiple-line input was displayed, by the interpreter, the display included "\n".

This is an "escape character" representation of the newline character. It appeared in the output at the point representing the end of the first line of input. This indicates that theinterpreter knows and remembers that the input string was split across two lines.

Numerically, the newline character is represented by the following:

  • 10 in decimal
  • A in hexadecimal
  • 012 in octal
  • 00001010 in binary
Historical note:

In case you are interested, very early versions of Python produced the following output for the input shown in Figure 3 :

'Dick\012Baldwin'

In those days, the newline character was represented by a backslash followed by its octal representation. (If you don't know what octal means, don't worry about it. It was effectively superseded by hexadecimal about twenty yearsago.)

Representing the newline character

As the name implies, a newline character is a character that means, "Go to the beginning of the next line."

The newline character is sort of like the wind. You can't see the wind, but you can see the result of the wind blowing through a tree.

Similarly, you can't normally see a newline character, but you can see what it does. Therefore, we must represent it bysomething else, like \n if we want to be able to see where it appears within a string.

An escape sequence

The \n is what we call an escape sequence . I will discuss escape sequences in detail a little later in this module.

One more syntax option

The Python Language Reference -- 2.4.1. String and Bytes literals describes one more syntax option for strings as shown below. I am going to let this one lie for the time being. I will come backand address it in a future module if I have the time. I am including it here simply for completeness.

Both string and bytes literals may optionally be prefixed with a letter 'r' or 'R'; such strings are called raw strings and treat backslashes as literal characters. As a result, in string literals, '\U' and '\u' escapes in raw strings are not treated specially. Given that Python 2.x's raw unicode literals behave differently than Python 3.x's the 'ur' syntax is not supported.

Questions & Answers

what is variations in raman spectra for nanomaterials
Jyoti Reply
I only see partial conversation and what's the question here!
Crow Reply
what about nanotechnology for water purification
RAW Reply
please someone correct me if I'm wrong but I think one can use nanoparticles, specially silver nanoparticles for water treatment.
Damian
yes that's correct
Professor
I think
Professor
what is the stm
Brian Reply
is there industrial application of fullrenes. What is the method to prepare fullrene on large scale.?
Rafiq
industrial application...? mmm I think on the medical side as drug carrier, but you should go deeper on your research, I may be wrong
Damian
How we are making nano material?
LITNING Reply
what is a peer
LITNING Reply
What is meant by 'nano scale'?
LITNING Reply
What is STMs full form?
LITNING
scanning tunneling microscope
Sahil
how nano science is used for hydrophobicity
Santosh
Do u think that Graphene and Fullrene fiber can be used to make Air Plane body structure the lightest and strongest. Rafiq
Rafiq
what is differents between GO and RGO?
Mahi
what is simplest way to understand the applications of nano robots used to detect the cancer affected cell of human body.? How this robot is carried to required site of body cell.? what will be the carrier material and how can be detected that correct delivery of drug is done Rafiq
Rafiq
what is Nano technology ?
Bob Reply
write examples of Nano molecule?
Bob
The nanotechnology is as new science, to scale nanometric
brayan
nanotechnology is the study, desing, synthesis, manipulation and application of materials and functional systems through control of matter at nanoscale
Damian
Is there any normative that regulates the use of silver nanoparticles?
Damian Reply
what king of growth are you checking .?
Renato
What fields keep nano created devices from performing or assimulating ? Magnetic fields ? Are do they assimilate ?
Stoney Reply
why we need to study biomolecules, molecular biology in nanotechnology?
Adin Reply
?
Kyle
yes I'm doing my masters in nanotechnology, we are being studying all these domains as well..
Adin
why?
Adin
what school?
Kyle
biomolecules are e building blocks of every organics and inorganic materials.
Joe
anyone know any internet site where one can find nanotechnology papers?
Damian Reply
research.net
kanaga
sciencedirect big data base
Ernesto
Introduction about quantum dots in nanotechnology
Praveena Reply
what does nano mean?
Anassong Reply
nano basically means 10^(-9). nanometer is a unit to measure length.
Bharti
do you think it's worthwhile in the long term to study the effects and possibilities of nanotechnology on viral treatment?
Damian Reply
absolutely yes
Daniel
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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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