This way you can get a list of numbers from 0 to 20
x = range(0,20)
This way you filter even numbers
even = filter(lambda x : x % 2 == 0, x)
This way you sum all the evens
x = reduce(lambda x, y : x + y, even, 0)
Do the proper thing for odd numbers 😉
As you are new to Python, let me suggest you to read the Built-in functions page in Python reference manual to find some funny functions to do these kind of things.
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solved Python code for adding all even numbers and odd numbers separately and displaying into separate totals