Question

我正在尝试理解此代码中的max函数。如果我使用我的常识，我把max函数放在这个k，max（len（v））而不是下面。但这给了我一个语法错误。 max函数如何在这里运行？

animals = { 'a': ['aardvark'], 'b': ['baboon'], 'c': ['coati']}

animals['d'] = ['donkey']
animals['d'].append('dog')
animals['d'].append('dingo')

def biggest(aDict):
    '''
    aDict: A dictionary, where all the values are lists.

    returns: The key with the largest number of values associated with it
    '''
    # List comprehension
    return max((k, len(v)) for k, v in aDict.items())[0]

print(biggest(animals))

Answer 1

您不需要最大值，但需要最长值。使用key的{{1}}参数：

max

输出：

from operator import itemgetter

animals = {'a': ['aardvark', 'donkey', 'dog'], 'b': ['baboon'], 'c': ['coati']}

def biggest(aDict):
    '''
    aDict: A dictionary, where all the values are lists.

    returns: The key with the largest number of values associated with it
    '''
    # List comprehension
    return max(((k, len(v)) for k, v in aDict.items()), key=itemgetter(1))[0]

print(biggest(animals))

替代解决方案：

理解中的最大功能

1 个答案: