Exercise: Map function I

Here, we use the map function to apply double to each element in numbers. However, there's something missing. Complete the code.
numbers = [1, 2, 3, 4, 5] def double(x): return x * 2
### adjust here ### result = list(map(double, ))
print(result) # expected [2, 4, 6, 8, 10]
Python
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