Python Print() Syntax
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to be clear:
in python 2.x what you get with a print() is a tuple of elements. the comma is there NOT because it is a separator but because it is used in print() to concatenate multiple items (Python objects) in a tuple.in python 3.x the print() statement print EVERYTHING if it is a string and concatenate the objects into a single string. If you do not pass a string but an object has a __str__() method, it is implicitly invoked.
trivial example in python 2, create a tuple:
t=("rob",21) print(t)
try to print it. you get exactly the same result than your example. then try the same in python 3.x. again...
the comma in the print statement is misleading you. it is just command synthax nothing to do with a char in a string or anything similar. when you see stuff into rounded brackets, this is a tuple. and by default elements in a tuple are separated by a comma.
(to be accurate the representation of a tuple according to its default __str__() method)
NOW
try the same thing calling tuple items explicitly:print(t[0], t[1])
output is different in python3! In this sense pythion 3 is more accurate in the data representation.
EVENTUALLY
if you really want a comma separated list of items into a string you must format it:print("%s; %s" % t)
in this case I've used a semicolon to point out the difference.
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EVENTUALLY
if you really want a comma separated list of items into a string you must format it:print("%s; %s" % t)
in this case I've used a semicolon to point out the difference.
Just to add a little bit to the formatting of strings.
If you are using python 3.6+ you can use formatted string literals or f-strings which in my opinion are much easier to read and use, rather than formatting with
%
or.format()
or concatenating strings.print(f'{name},{dob}') romo,1986
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@momurda said in Python Print() Syntax:
Say i want to print some stuff to terminal screen
name = "matt" dob = "1980" print(name,dob) print(name + " ",dob)
Result is the same. Is there a reason Thonny chooses to teach me method 2? Is it just to illustrate concatenation with strings and variables in print function?
For comparison, this is how I'd do that same code in PHP:
<?php $name = 'tim'; $year = '2018'; echo $name . " " . $year; ?>
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@tim_g said in Python Print() Syntax:
@momurda said in Python Print() Syntax:
Say i want to print some stuff to terminal screen
name = "matt" dob = "1980" print(name,dob) print(name + " ",dob)
Result is the same. Is there a reason Thonny chooses to teach me method 2? Is it just to illustrate concatenation with strings and variables in print function?
For comparison, this is how I'd do that same code in PHP:
<?php $name = 'tim'; $year = '2018'; echo $name . " " . $year; ?>
Well, that's how you'd do it in PHP that is encapsulated inside of HTML. Not really how PHP does it exactly.
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PHP itself looks like this in a REPL...
$name = "Scott"; => "Scott" $dob = "1976"; => "1976" print $name . $dob; Scott1976
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@scottalanmiller said in Python Print() Syntax:
@tim_g said in Python Print() Syntax:
@momurda said in Python Print() Syntax:
Say i want to print some stuff to terminal screen
name = "matt" dob = "1980" print(name,dob) print(name + " ",dob)
Result is the same. Is there a reason Thonny chooses to teach me method 2? Is it just to illustrate concatenation with strings and variables in print function?
For comparison, this is how I'd do that same code in PHP:
<?php $name = 'tim'; $year = '2018'; echo $name . " " . $year; ?>
Well, that's how you'd do it in PHP that is encapsulated inside of HTML. Not really how PHP does it exactly.
What's it matter... anything inside of the PHP tags is being parsed by PHP.
That's how you do it also in a PHP file with no html. I'm not sure what your point is. -
@tim_g said in Python Print() Syntax:
@scottalanmiller said in Python Print() Syntax:
@tim_g said in Python Print() Syntax:
@momurda said in Python Print() Syntax:
Say i want to print some stuff to terminal screen
name = "matt" dob = "1980" print(name,dob) print(name + " ",dob)
Result is the same. Is there a reason Thonny chooses to teach me method 2? Is it just to illustrate concatenation with strings and variables in print function?
For comparison, this is how I'd do that same code in PHP:
<?php $name = 'tim'; $year = '2018'; echo $name . " " . $year; ?>
Well, that's how you'd do it in PHP that is encapsulated inside of HTML. Not really how PHP does it exactly.
What's it matter... anything inside of the PHP tags is being parsed by PHP.
That's how you do it also in a PHP file with no html. I'm not sure what your point is.PHP is often taught as only existing inside HTML, rather than being its own language. It can be very confusing. The average person using PHP doesn't even realize that you can run PHP scripts.
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@scottalanmiller said in Python Print() Syntax:
@tim_g said in Python Print() Syntax:
@scottalanmiller said in Python Print() Syntax:
@tim_g said in Python Print() Syntax:
@momurda said in Python Print() Syntax:
Say i want to print some stuff to terminal screen
name = "matt" dob = "1980" print(name,dob) print(name + " ",dob)
Result is the same. Is there a reason Thonny chooses to teach me method 2? Is it just to illustrate concatenation with strings and variables in print function?
For comparison, this is how I'd do that same code in PHP:
<?php $name = 'tim'; $year = '2018'; echo $name . " " . $year; ?>
Well, that's how you'd do it in PHP that is encapsulated inside of HTML. Not really how PHP does it exactly.
What's it matter... anything inside of the PHP tags is being parsed by PHP.
That's how you do it also in a PHP file with no html. I'm not sure what your point is.PHP is often taught as only existing inside HTML, rather than being its own language. It can be very confusing. The average person using PHP doesn't even realize that you can run PHP scripts.
I've been using PHP to output html. Where PHP is understanding html too, rather than the other way.
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@tim_g said in Python Print() Syntax:
@scottalanmiller said in Python Print() Syntax:
@tim_g said in Python Print() Syntax:
@scottalanmiller said in Python Print() Syntax:
@tim_g said in Python Print() Syntax:
@momurda said in Python Print() Syntax:
Say i want to print some stuff to terminal screen
name = "matt" dob = "1980" print(name,dob) print(name + " ",dob)
Result is the same. Is there a reason Thonny chooses to teach me method 2? Is it just to illustrate concatenation with strings and variables in print function?
For comparison, this is how I'd do that same code in PHP:
<?php $name = 'tim'; $year = '2018'; echo $name . " " . $year; ?>
Well, that's how you'd do it in PHP that is encapsulated inside of HTML. Not really how PHP does it exactly.
What's it matter... anything inside of the PHP tags is being parsed by PHP.
That's how you do it also in a PHP file with no html. I'm not sure what your point is.PHP is often taught as only existing inside HTML, rather than being its own language. It can be very confusing. The average person using PHP doesn't even realize that you can run PHP scripts.
I've been using PHP to output html. Where PHP is understanding html too, rather than the other way.
It can do anything really. Most PHP is that way I seen, rather than being inside of an html file.
Unless I'm doing it wrong...
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@tim_g said in Python Print() Syntax:
@tim_g said in Python Print() Syntax:
@scottalanmiller said in Python Print() Syntax:
@tim_g said in Python Print() Syntax:
@scottalanmiller said in Python Print() Syntax:
@tim_g said in Python Print() Syntax:
@momurda said in Python Print() Syntax:
Say i want to print some stuff to terminal screen
name = "matt" dob = "1980" print(name,dob) print(name + " ",dob)
Result is the same. Is there a reason Thonny chooses to teach me method 2? Is it just to illustrate concatenation with strings and variables in print function?
For comparison, this is how I'd do that same code in PHP:
<?php $name = 'tim'; $year = '2018'; echo $name . " " . $year; ?>
Well, that's how you'd do it in PHP that is encapsulated inside of HTML. Not really how PHP does it exactly.
What's it matter... anything inside of the PHP tags is being parsed by PHP.
That's how you do it also in a PHP file with no html. I'm not sure what your point is.PHP is often taught as only existing inside HTML, rather than being its own language. It can be very confusing. The average person using PHP doesn't even realize that you can run PHP scripts.
I've been using PHP to output html. Where PHP is understanding html too, rather than the other way.
It can do anything really. Most PHP is that way I seen, rather than being inside of an html file.
Unless I'm doing it wrong...
Nearly all PHP is written to be called by a web server. PHP can do anything, but it's so commonly used as a file on a web server that it is almost exclusively assumed to be what it is being used for.