如何将函数中的单位添加到主列表答案

【问题标题】：How to add units from a funtion to main lists如何将函数中的单位添加到主列表
【发布时间】：2021-08-11 06:51:03
【问题描述】：

我有一个问题，我需要将在森林中发现的物种分类到不同的列表中。到目前为止，这是我的代码：

# we assume these to be mutually exclusive lists
TREES = ["spruce", "pine", "birch", "maple", "willow", "oak"]
MUSHROOMS = ["false morel", "chantarelle", "milkcap", "funnel chantarelle", "brittlegill", "black trumpet", "forest lamb"]
FLOWERS = ["lily", "bluebell", "violet", "daisy", "red clover", "dandelion", "yarrow", "anemone"]

OTHER = 0
TREE = 1
MUSHROOM = 2
FLOWER = 3


def print_in_alphabetical_order(list_of_strings):
    list_of_strings.sort()
    for i in list_of_strings:
        print(i)

def classify_species(species):
    i = str(species)
    if i in TREES:
        return TREE
    elif i in MUSHROOMS:
        return MUSHROOM
    elif i in FLOWERS:
        return FLOWER
    else:
        return OTHER

def main():
    species = []
    lajike = str(input("Enter the species of the items you found in the forest. Stop with empty line.\n"))
    while lajike:
        species.append(lajike)
        lajike = str(input())
        end = "\n"
    print("Your finds in alphabetical order:")
    print_in_alphabetical_order(species)
    trees = []
    mushrooms = []
    flowers = []
    other = []

“classify_species”功能应该可以正常工作。问题是，如何将 [species] 列表中的项目添加到主函数中的其他列表中？应该使用“classify_species”函数添加它们。我认为它必须使用 for-command 完成，但我不知道为什么。非常感谢您的帮助！

【问题讨论】：

欢迎来到Stack Overflow！请尝试将您问题中的代码进一步简化为minimal reproducible example。如果仍然与手头的问题相关，还请准确说明您想要实现的目标，例如，您只想计算标本（按物种类别）还是存储实际发生的物种？即，结果应该是“3 棵树，5 只蘑菇”还是“2 棵橡树，1 只桦树，5 只森林羔羊”？还尝试展示您尝试过的内容并解释它是如何失败的（您是否收到错误消息，代码的结果或其他行为是否超出预期等）。另请参阅 How to Ask 中的 help center。

标签： python list function

【解决方案1】：

我假设您在询问如何将项目从 species 列表过滤到所有其他列表 trees, mushrooms, flowers, other

# we assume these to be mutually exclusive lists
TREES = ["spruce", "pine", "birch", "maple", "willow", "oak"]
MUSHROOMS = ["false morel", "chantarelle", "milkcap", "funnel chantarelle", "brittlegill", "black trumpet", "forest lamb"]
FLOWERS = ["lily", "bluebell", "violet", "daisy", "red clover", "dandelion", "yarrow", "anemone"]

OTHER = 0
TREE = 1
MUSHROOM = 2
FLOWER = 3


def print_in_alphabetical_order(list_of_strings):
    list_of_strings.sort()
    for i in list_of_strings:
        print(i)

def classify_species(species):
    i = str(species)
    if i in TREES:
        return TREE
    elif i in MUSHROOMS:
        return MUSHROOM
    elif i in FLOWERS:
        return FLOWER
    else:
        return OTHER

def main():
    species = []
    lajike = str(input("Enter the species of the items you found in the forest. Stop with empty line.\n"))
    while lajike:
        species.append(lajike)
        lajike = str(input())
        end = "\n"
    print("Your finds in alphabetical order:")
    print_in_alphabetical_order(species)
    
    trees = []
    mushrooms = []
    flowers = []
    other = []

    for i in species:
        result = classify_species(i)
        if result == TREE:
            trees.append(i)
        elif result == MUSHROOM:
            mushrooms.append(i)
        elif result == FLOWER:
            flowers.append(i)
        else:
            other.append(i)

【讨论】：

没错！非常感谢！
@KK 如果我的答案是正确的，请点击对号标记将其标记为正确，这对我有很大帮助:)