Re: print function question

[Simon Forman]

Bertrand-Xavier M. wrote:
> On Tuesday 25 July 2006 05:52, Eric Bishop wrote:
> > Why does this work:
> >
> > # start
> > a = 5
> >
> > print a, 'is the number'
> >
> > #end, prints out "5 is the number"
> >
> > But not this:
> >
> > # start
> >
> > a = 5
> >
> > print a 'is the number'
> >
> > #end, errors out
> >
> > The difference here is the comma seperating the variable and the string
> > literal. Is the comma some sort of concatenation operator or is the comma
> > necessary in some form of a requirement in the print function, i.e is the
> > variable a an argument to print as well as 'is th number' another argument
> > to print?
>
> Yes.
> It allows to concat several variables, and also adds a space.
> These do work as well:
>
> a = 5
> print "value is", a
> print "value %s" %(a)
> print "value is", a, '...'
>
> Regards,
> Rob

Also, a comma at the end of a print statement surpresses the usual
trailing newline (it will cause a space to appear instead if you print
something else, but NOT if you write directly to stdout.)

print "Hello",
print "world!"

# prints Hello world! on one line with a space between them, but

import sys
print "Hello",
sys.stdout.write("world!")

# prints Helloworld!

Peace,
~Simon

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Re: print function question

[Bertrand-Xavier M.]

On Tuesday 25 July 2006 05:52, Eric Bishop wrote:
> Why does this work:
>
> # start
> a = 5
>
> print a, 'is the number'
>
> #end, prints out "5 is the number"
>
> But not this:
>
> # start
>
> a = 5
>
> print a 'is the number'
>
> #end, errors out
>
> The difference here is the comma seperating the variable and the string
> literal. Is the comma some sort of concatenation operator or is the comma
> necessary in some form of a requirement in the print function, i.e is the
> variable a an argument to print as well as 'is th number' another argument
> to print?

Yes.
It allows to concat several variables, and also adds a space.
These do work as well:

a = 5
print "value is", a
print "value %s" %(a)
print "value is", a, '...'

Regards,
Rob
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print function question

[Eric Bishop]

Why does this work:
 
# start 
a = 5
 
print a, 'is the number'
#end, prints out "5 is the number"
 
But not this:
 
# start
 
a = 5
 
print a 'is the number'
 
#end, errors out
 
The difference here is the comma seperating the variable and the string literal. Is the comma some sort of concatenation operator or is the comma necessary in some form of a requirement in the print function, i.e is the variable a an argument to print as well as 'is th number' another argument to print?

-- Thanks,Eric 
-- 
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