I’m new to programming a bit, and am learning python so I can learn flask, using the python crash course book. I was learning about list comprehension but it briefly talks about it. If I do
list[list.append(value) for value in range(1, 20)]
it doesn’t work. Would this be some sort of recursive expression that is not possible?
List comprehensions return a new list. For the sake of code clarity, you probably shouldn’t change a second list from within a list comprehension. If you’re trying to concatenate two lists, you can do so in a second line:
a = list(range(10)) b = [ value for value in range(5) ] a.extend(b) # a has 15 elements print(a)