Lists
Given two lists. concatenate them (that is, combine them into a single list).
For example, given [1, 2] and [3, 4]:
>>> concat_lists([1, 2], [3, 4])
[1, 2, 3, 4]
It should work if either list is empty:
>>> concat_lists([], [1, 2])
[1, 2]
>>> concat_lists([1, 2], [])
[1, 2]
>>> concat_lists([], [])
[]
We’ve included a file, concatlists.py, with a function, concat_lists:
def concat_lists(list1, list2):
"""Combine lists."""
However, this function is unimplemented.