Fredrik Lundh wrote:
>> I have a code
>> ==================CODE=============
>> List=[['1', 'a', '6'], ['1', 'b', '6'], ['1', 'c', '6'],
>> ['1', 'd', '6'],['2', 'a','6'], ['2', 'b', '6'],
>> ['2', 'c', '6'], ['2', 'd', '6'], ['3', 'a', '6'],
>> ['3','b', '6'], ['4', 'a', '6'], ['4', 'b', '6']]
>>
>>
>> for x in List:
>> temp=[]
>> print x
>> for y in List:
>> if x[0]==y[0]:
>> print y[0],y[1]
>> temp.append(y)
>> for z in temp:
>> List.remove(z)
>> print 'rem', z
>
> the for loop uses an internal index to fetch items from the list you're
> looping over, so if you remove items from it, you'll end up skipping
> over items.
forgot to mention that the fix is to change the first for statement to:
for x in List[:]:
</F>
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