51 lines
1.7 KiB
Markdown
51 lines
1.7 KiB
Markdown
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---
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title: Python Max Function
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localeTitle: Python Max函数
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---
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`max()`是Python 3中的内置函数。它返回可迭代中的最大项或两个或多个参数中的最大项。
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## 参数
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此函数将两个或多个数字或任何类型的iterable作为参数。在给出一个iterable作为参数时，我们必须确保iterable中的所有元素都是相同的类型。这意味着我们无法传递一个包含字符串和整数值的列表。 句法： max（iterable，\* iterables \[，key，default\]） max（arg1，arg2，\* args \[，key\]）
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有效参数：
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```
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max(2, 3)
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max([1, 2, 3])
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max('a', 'b', 'c')
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```
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参数无效：
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```
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max(2, 'a')
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max([1, 2, 3, 'a'])
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max([])
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```
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## 回报价值
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返回iterable中的最大项。如果提供了两个或多个位置参数，则返回最大的位置参数。如果iterable为空并且未提供default，则引发`ValueError` 。
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## 代码示例
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```
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print(max(2, 3)) # Returns 3 as 3 is the largest of the two values
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print(max(2, 3, 23)) # Returns 23 as 23 is the largest of all the values
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list1 = [1, 2, 4, 5, 54]
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print(max(list1)) # Returns 54 as 54 is the largest value in the list
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list2 = ['a', 'b', 'c' ]
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print(max(list2)) # Returns 'c' as 'c' is the largest in the list because c has ascii value larger then 'a' ,'b'.
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list3 = [1, 2, 'abc', 'xyz']
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print(max(list3)) # Gives TypeError as values in the list are of different type
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#Fix the TypeError mentioned above first before moving on to next step
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list4 = []
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print(max(list4)) # Gives ValueError as the argument is empty
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```
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 [运行代码](https://repl.it/CVok)
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[官方文件](https://docs.python.org/3/library/functions.html#max)
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