Finding a sum in nested list using a lambda function

reduce can help

from functools import reduce

total = reduce(lambda accumulator,element:accumulator+int(element[1]), table,0)

One approach is to use a generator expression:

total = sum(int(v) for name,v in table)

sum(map(int,zip(*table)[-1]))

is one way to do it ... there are many options however

If you want to use lambda the following should solve it:

total = sum(map(lambda x: int(x[1]), table))