从函数中,返回多个参数 Returning Multiple Values in Python - GeeksforGeeks 在Python 中,我们使用 return Tuple 的方式,从函数中返回多个参数,并直接赋值给变量。 # A Python program to return multiple # values from a method using tuple # This function returns a tuple def fun(): str = "geeksforge...
Returning Multiple Named-Objects When you’re writing a function that returns multiple values in a single return statement, you can consider using a collections.namedtuple object to make your functions more readable. namedtuple is a collection class that returns a subclass of tuple that has fields ...
[Python Tutorial: Returning Multiple Values from Functions](
本章经过大幅编辑,比第一版《流畅的 Python》中对应的第十一章长约 24%。虽然有些部分和许多段落是相同的,但也有很多新内容。以下是亮点: 本章的介绍和类型映射(图 13-1)是新内容。这是本章和所有涉及 Python ≥ 3.8 中类型的其他章节中大部分新内容的关键。 “两种类型的协议”解释了动态协议和静态协议之...
在Python 3 中,从映射方法 .items()、.keys() 和.values() 返回的对象分别实现了 ItemsView、KeysView 和ValuesView 中定义的接口。前两者还实现了 Set 的丰富接口,其中包含我们在 “集合操作” 中看到的所有运算符。Iterator请注意,迭代器子类 Iterable。我们在 第十七章 中进一步讨论这一点。
Remember thatIDEsand third-party static type checker tools can catch type-related errors in the development and testing process. These tools infer the type from return values and ensure that functions are returning the expected type. Be sure to take advantage of this useful function that can reve...
Python是解释型语言,没有严格意义上的编译和汇编过程。但是一般可以认为编写好的python源文件,由python解释器翻译成以.pyc为结尾的字节码文件。pyc文件是二进制文件,可以由python虚拟机直接运行。 Python在执行import语句时,将会到已设定的path中寻找对应的模块。并且把对应的模块编译成相应的PyCodeObject中间结果,然后创建...
values on the otheraxes are still respected in the join.keys : sequence, default NoneIf multiple levels passed, should contain tuples. Constructhierarchical index using the passed keys as the outermost level.levels : list of sequences, default NoneSpecific levels (unique values) to use for ...
The function then creates a pipe to link up to the stdout of the subprocess, which the function then reads into the CompletedProcess object’s stdout attribute. By the time it’s a CompletedProcess, it’s no longer a pipe, but a bytes object that can be accessed multiple times....
If multiple values given, the `other` DataFrame must have a MultiIndex. Can pass an array as the join key if it is not already contained in the calling DataFrame. Like an Excel VLOOKUP operation. how : {'left', 'right', 'outer', 'inner'}, default 'left' How to handle the ...