Beema Shafreen wrote:
> I have a script using functions , I have a problem in returning the
> result. My script returns only one line , i donot know where the looping
> is giving problem, Can any one suggest, why this is happening and let me
> know how to return all the lines
>
> def get_ptm():
> fh = open('file.txt', 'r')
> data_lis = []
> for line in fh.readlines():
> data = line.strip().split('\t')
> id = data[0].strip()
> gene_symbol = data[1].strip()
> ptms = data[8].strip()
> result = "%s\t%s\t%s" %(id,gene_symbol,ptms)
> return result
note that you put the "return" statement inside the loop, so returning
only one line is the expected behaviour.
result = "%s\t%s\t%s" %(id,gene_symbol,ptms)
data_lis.append(result)
and then return the list when done:
> fh.close()
return data_lis
:::
if you change the original return to "yield", the function will turn
into a "generator" that yields one result at a time.
result = "%s\t%s\t%s" %(id,gene_symbol,ptms)
yield result
for more on generators, and how they are used, see the documentation.
</F>