sharon kim wrote:
i have a list, for example;
>>> L=[]
>>> L.append('10')
>>> L.append('15')
>>> L.append('20')
>>> len(L)
3
>>> print L
['10', '15', '20']
is there a way to sum up all the numbers in a list? the number of
objects in the list is vary, around 50 to 60. all objects are 1 to 3
digit positive numbers.
the for-in statement is your friend:
S = 0
for item in L:
S += int(item)
it can also be used in-line (this is called a "generator expression"):
S = sum(int(v) for v in L)
or even hidden inside a built-in helper function:
S = sum(map(int, L))
</F>
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