Python 如何用枚舉循環

Question

我想從數字轉換該代碼，例如：

animal = ["Dog1","Dog2","Dog3"]

到動物的名字。

def start():
    animal = ["Dog","Cat","Bird"]
    index = 0
    max_value = max(animal)
    max_index = animal.index(max_value)
    for index, animal in enumerate(animal):
        while True:
            if index <= max_index:
                print(animal, index, "Max index: ",max_index)
            break
    start()    
    print("Fresh loop!")

如何做到這一點，以及如何在 while 循環中刪除 start()？ 我想

if index == max_index: 

刷新循環。 該代碼適用於

["Dog1","Dog2","Dog3"] 

但不適用於

["Dog","Cat","Bird"]

Answer 1

調用你的 function start本身會產生無限循環

if index == max_index:
            print("Fresh loop!")
            start()      

Answer 2

正如@Mark Tolonen 評論的那樣，我強烈建議不要在 if 條件中使用 start 以避免無限循環

def start():
    animal = ["site1","site2","site3"]
    index = 0
    max_value = max(animal)
    max_index = animal.index(max_value)
    for index, animal in enumerate(animal):
        print(animal, index, "Max index: ",max_index)
        if index == max_index:
            print("Fresh loop!")
            start()

start()

Output：

site1 0 Max index:  2
site2 1 Max index:  2
site3 2 Max index:  2
Fresh loop!
site1 0 Max index:  2
site2 1 Max index:  2
site3 2 Max index:  2
Fresh loop!
...

第二個要求：使用while循環

def start():
    animal = ["Dog", "Cat", "Rat"]
    index = 0
    max_value = max(animal)
    max_index = animal.index(max_value)
    while index <= max_index:
        print(animal[index], index, "Max index: ",max_index)
        index = index + 1
        if index == len(animal):
            print("Fresh loop!")
            index = 0

start()

或者你甚至可以這樣做

def start(animal):
    index = 0
    max_value = max(animal)
    max_index = animal.index(max_value)
    while index <= max_index:
        print(animal[index], index, "Max index: ",max_index)
        index = index + 1
        if index == len(animal):
            print("Fresh loop!")
            index = 0

animal = ["Dog", "Cat", "Rat"]
start(animal)

Output：

Dog 0 Max index:  2
Cat 1 Max index:  2
Rat 2 Max index:  2
Fresh loop!
...