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>
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