Append to python List
RAHUL RAJ
omrahulrajcse at gmail.com
Thu May 9 02:36:28 EDT 2013
Checkout the following code:
sample2 = [x+y for x in range(1,10) for y in range(1,10) if x!=y]
output=[]
output=[x for x in sample2 if x not in output]
the output I get is
3 4 5 6 7 8 9 10 3 5 6 7 8 9 10 11 4 5 7 8 9 10 11 12 5 6 7 9 10 11 12 13 6 7 8 9 11 12 13 14 7 8 9 10 11 13 14 15 8 9 10 11 12 13 15 16 9 10 11 12 13 14 15 17 10 11 12 13 14 15 16 17
which contains duplicate values.
But if I do like this:
sample2 = [x+y for x in range(1,10) for y in range(1,10) if x!=y]
output=[]
for x in sample2:
if x not in output:
output.append(x)
the value of 'output' I get like this:
3 4 5 6 7 8 9 10 11 12 13 14 15 16 17
I know that both the programs have the same functionality, but why do I have different outputs?
Please help!
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