五十七、open方法
1、定义:
open(...) open(name[, mode[, buffering]]) -> file object Open a file using the file() type, returns a file object. This is the preferred way to open a file. See file.__doc__ for further information.
2、解释:用file函数类型打开一个文件并返回一个文件对象。这个方法是打开一个文件的首先方法。
3、举例:(略)
(以下省略)
五十二、memoryview方法(略)
用于查看一个对象的内存地址
五十三、min方法(略)
(以下省略)
五十、map方法
1、定义:
map(...) map(function, sequence[, sequence, ...]) -> list Return a list of the results of applying the function to the items of the argument sequence(s). If more than one sequence is given, the function is called with an argument list consisting of the corresponding item of each sequence, substituting None for missing values when not all sequences have the same length. If the function is None, return a list of the items of the sequence (or a list of tuples if more than one sequence).
2、解释:返回由function方法处理过sequence每个元素的列表。若传入多个sequence时, 则分别从这些sequence中取出同序列号的元素作为一个list传入到function中。
对于长度不够的sequence 以None代替从该sequence中取出的值。如果function为None, 则返回由这些sequence中取出同序列号的元素组成的list。
(以下省略)
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