printing list

[compboy]

How do you print elements of the list in one line?

alist = [1, 2, 5, 10, 15]

so it will be like this:
1, 2, 5, 10, 15

because if I use this code

for i in alist:
print i

the result would be like this

1
2
5
10
15

Thanks.

[Gary Herron]

Re: printing list

compboy wrote:
[color=blue]
>How do you print elements of the list in one line?
>
>alist = [1, 2, 5, 10, 15]
>
>so it will be like this:
>1, 2, 5, 10, 15
>
>because if I use this code
>
>for i in alist:
> print i
>
>the result would be like this
>
>1
>2
>5
>10
>15
>
>Thanks.
>
>[/color]

Well, first, if you just print alist you'll get

[1, 2, 5, 10, 15]

which may be good enough. If that's not what you want then you can suppress the automatic RETURN that follows a print's output by adding a trailing comma to the print statement, like this

for i in alist:
print i,

1 2 5 10 15

Gary Herron

[Tim Chase]

Re: printing list

compboy wrote:[color=blue]
> How do you print elements of the list in one line?
>
> alist = [1, 2, 5, 10, 15]
>
> so it will be like this:
> 1, 2, 5, 10, 15[/color]
[color=blue][color=green][color=darkred]
>>> print ', '.join(alist)[/color][/color][/color]
1, 2, 5, 10, 15

-tkc

[Raymond L. Buvel]

Re: printing list

compboy wrote:[color=blue]
> How do you print elements of the list in one line?
>
> alist = [1, 2, 5, 10, 15]
>
> so it will be like this:
> 1, 2, 5, 10, 15
>
> because if I use this code
>
> for i in alist:
> print i
>
> the result would be like this
>
> 1
> 2
> 5
> 10
> 15
>
> Thanks.
>[/color]

There are a number of ways to do it but if you want a one-liner:

print repr(alist)[1:-1]

will meet your spec.

[Mel Wilson]

Re: printing list

Tim Chase wrote:[color=blue]
> compboy wrote:
>[color=green]
>> How do you print elements of the list in one line?
>>
>> alist = [1, 2, 5, 10, 15]
>>
>> so it will be like this:
>> 1, 2, 5, 10, 15[/color]
>
>[color=green][color=darkred]
> >>> print ', '.join(alist)[/color][/color]
> 1, 2, 5, 10, 15[/color]

???

Python 2.4.2 (#1, Jan 23 2006, 21:24:54)
[GCC 3.3.4] on linux2
Type "help", "copyright" , "credits" or "license" for more
information.[color=blue][color=green][color=darkred]
>>> a=[1,2,3,4,5]
>>> print ', '.join (a)[/color][/color][/color]
Traceback (most recent call last):
File "<stdin>", line 1, in ?
TypeError: sequence item 0: expected string, int found[color=blue][color=green][color=darkred]
>>> print ', '.join ('%d'%x for x in a)[/color][/color][/color]
1, 2, 3, 4, 5

[Dan Sommers]

Re: printing list

On Sun, 07 May 2006 18:16:22 -0400,
Mel Wilson <mwilson-to@sympatico.ca > wrote:
[color=blue]
> Tim Chase wrote:[color=green]
>> compboy wrote:
>>[color=darkred]
>>> How do you print elements of the list in one line?
>>>
>>> alist = [1, 2, 5, 10, 15]
>>>
>>> so it will be like this:
>>> 1, 2, 5, 10, 15[/color]
>>
>>[color=darkred]
>> >>> print ', '.join(alist)[/color]
>> 1, 2, 5, 10, 15[/color][/color]
[color=blue]
> ???[/color]
[color=blue]
> Python 2.4.2 (#1, Jan 23 2006, 21:24:54)
> [GCC 3.3.4] on linux2
> Type "help", "copyright" , "credits" or "license" for more information.[color=green][color=darkred]
>>>> a=[1,2,3,4,5]
>>>> print ', '.join (a)[/color][/color]
> Traceback (most recent call last):
> File "<stdin>", line 1, in ?
> TypeError: sequence item 0: expected string, int found[color=green][color=darkred]
>>>> print ', '.join ('%d'%x for x in a)[/color][/color]
> 1, 2, 3, 4, 5[/color]

Or one of:

print ', '.join(str(x) for x in a)

print ', '.join(map(str, a))

both of which work if the list contains non-integer elements.

Regards,
Dan

--
Dan Sommers
<http://www.tombstoneze ro.net/dan/>
"I wish people would die in alphabetical order." -- My wife, the genealogist