你和好朋友各写了一份野餐零食清单。写 merge_snacks(mine, yours),合成一份:先是你的,再是朋友的,同一样零食只出现一次(第一次出现的位置)。
merge_snacks(["chips", "grapes"], ["cookies", "chips"])→['chips', 'grapes', 'cookies']merge_snacks([], ["juice"])→['juice']def merge_snacks(mine, yours):
merged = []
for snack in mine + yours:
# 在这里写:merged 里还没有,才放进去
pass
return merged
写好了先点「运行」试试示例,没问题再点「提交」。