Python max()

内置函数max()有助于 返回给定可迭代表中最大的元素。也可以在两个或多个参数之间找到最大的元素。

 # to find the largest item in an iterable
**max(iterable, *iterables, key, default)** 

 # to find the largest item between two or more objects
**max(arg1, arg2, *args, key)** 

带有 iterable 的max()函数具有以下参数。

*最大值(可重复，可重复，键，默认)**

不带iterable()的iterable()函数有以下参数。

*最大值(arg1、arg2、args、键)**

在传递空迭代器的情况下，它会引发 ValueError 异常。为了避免这种情况，我们可以传递默认参数。
如果我们传递多个迭代器，那么从给定的迭代器中返回最大的项。

| 投入 | 返回值 |
| 整数 | 最大整数 |
| 线 | 具有最大 Unicode 值的字符 |

 number = [13, 2, 8, 5, 10, 26]
largest_number = max(number);

print("The largest number is:", largest_number) 

输出:

The largest number is: 26 

 languages = ["Python", "C Programming", "Java", "JavaScript"]
largest_string = max(languages);

print("The largest string is:", largest_string) 

输出:

The largest string is: Python 

 square = {2: 4, -3: 9, -1: 1, -2: 4}

# the largest key
key1 = max(square)
print("The largest key:", key1)    # 2

# the key whose value is the largest
key2 = max(square, key = lambda k: square[k])

print("The key with the largest value:", key2)    # -3

# getting the largest value
print("The largest value:", square[key2])    # 9 

输出:

The largest key: 2
The key with the largest value: -3
The largest value: 9 

 result = max(4, -5, 23, 5)
print("The maximum number is:", result) 

输出:

The maximum number is: 23 

 class Data:
    id = 0

    def __init__(self, i):
        self.id = i

    def __str__(self):
        return 'Data[%s]' % self.id

def get_data_id(data):
    return data.id

# max() with objects and key argument
list_objects = [Data(1), Data(2), Data(-10)]

print(max(list_objects, key=get_data_id)) 

输出:

Data[2]