Shivlal Sharma wrote: > from functools import* > nums = [1, 2, 3, 4, 5, 6, 7, 8, 9] > add = reduce(lambda a : a + 1, nums) > print(add) > > error: - > TypeError Traceback (most recent call > last) <ipython-input-15-684b5d4fac30> in <module>() > 1 from functools import* > 2 nums = [1, 2, 3, 4, 5, 6, 7, 8, 9] > ----> 3 add = reduce(lambda a : a + 1, nums) > 4 print(add) > > TypeError: <lambda>() takes 1 positional argument but 2 were given
Read the error message: your lambda accepts ony one argument, but reduce tries to pass two to it. That you don't need the second argument doesn't mean that you can it omit it, so: >>> from functools import reduce >>> reduce(lambda a, b: a + 1, range(1, 10)) 9 -- https://mail.python.org/mailman/listinfo/python-list
