[Tutor] List action

[Max Noel]

On Oct 3, 2004, at 15:49, kumar s wrote:

> I wrote a function that looks like following:
>>>> def element(x):
> 	for i in x:
> 		i.split()
>
> 		
>>>> k = element(qval)
>>>> k
>
> I get nothing in this K. It is empty.

	That's because your function returns nothing. I would do this with a 
list comprehension:
k = [i.split() for i in x]

> 2. After getting a file with all lists in a format
> like this:
> ['0.000100848', '0.02449766', '1']
> ['0.000109613', '0.02608342', '1']
> ['0.000113775', '0.02653233', '1']
> ['0.000143877', '0.03273097', '1']
> ['0.00014597', '0.03273097', '1']
> ['0.000149585', '0.0329087', '1']
> ['0.000159045', '0.03434194', '1']
> ['0.000176115', '0.03696072', '1']
>
> How do I write each element into a tab delimited text
> file.

	It's not very hard. Here's how you would output this to the standard 
out:

for line in k:
	print '\t'.join(line)

	Just redirect the standard out to the file you want to store the data 
in. If you want the program itself to write the file, it's just a 
matter of opening the file in write mode, then writing to it instead of 
printing the data.

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