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We can find sum of each column of the given nested list using zip function of python enclosing it within list comprehension. Another approach is to use map(). We apply the sum function to each element in a column and find sum of each column accordingly.
Python provides an inbuilt function sum() which sums up the numbers in the list. Syntax: sum(iterable, start) iterable : iterable can be anything list , tuples or dictionaries , but most importantly it should be numbers. start : this start is added to the sum of numbers in the iterable.
I try to sum a list of nested elements
e.g, numbers=[1,3,5,6,[7,8]] should produce sum=30
I wrote the following code :
def nested_sum(L):
sum=0
for i in range(len(L)):
if (len(L[i])>1):
sum=sum+nested_sum(L[i])
else:
sum=sum+L[i]
return sum
The above code gives following error:
object of type 'int' has no len()
I also tried len([L[i]]), still not working.
Anyone can help? It is Python 3.3
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