The main difference between __str__ and __repr__ is that __str__ should return a string that is easy for humans to read, while __repr__ should return a string that is more machine-readable and is intended to be used for debugging. For example, __repr__ might return something like...
Python内置函数repr()和str()分别调用object.repr(self)和object.str(self)方法。第一个函数计算对象的官方表示,而第二个函数返回对象的非正式表示。对于整数对象,这两个函数的结果是相同的。>>> x = 1 >>> repr(x) '1' >>> str(x) '1'
本来就太危险了(例如,如果对象相互引用,太容易进入无限递归)。所以 Python 警察出来了。请注意,有一个默认值为 true:如果定义了__repr__,而__str__未定义,则该对象的行为就像__str__=__repr__。 这意味着,简单来说:您实现的几乎每个对象都应该具有可用于理解对象的函数__repr__。实现__str__是可选的...
First, let me reiterate the main points in Alex’s post: The default implementation is useless (it’s hard to think of one which wouldn’t be, but yeah) __repr__goal is to be unambiguous __str__goal is to be readable Container’s__str__uses contained objects’__repr__ >>>classF...
Opposite Variations of Sets and Bytes Mutability in Built-in Types: A Summary Common Mutability-Related Gotchas Mutability in Custom Classes Techniques to Control Mutability in Custom Classes Conclusion Mark as Completed Share Recommended Video CourseDifferences Between Python's Mutable and Immutab...
1.Understand the vide and learn the gd deeds shwn in it;2.Read the text and chse the best explanatin f the title;3.Analyse the cntent f the text and find ut the detailed infrmatin;4.Imprve critical thinking skills and cmprehend the unit’s theme.Step Ⅰ Lead-inActivity 1 Watch ...
First, among plenty studies that have done in the electric field, research on the electricity consumption pattern between heavy and light industry is rare. So far as we know, this is the first paper to focus on the industrial difference of power load from a policy perspective. Second, as a...
(H2): Innovative environment has a positive effect on technology innovation, while regional differences and temporal variations of effect size exist. There are many arguments about the relationship between enterprise scale and innovation efficiency [35,36]. For instance, Pavitt, Robson and Townsend (...
1.%s,%r的区别在进行格式化输出时,%r与 %s的区别就好比 repr() 函数处理对象与 str() 函数处理对象的差别。%s ⇒ str(),比较智能;%r⇒ repr(),处理较为简单和直接;处理一些简单对象时,二者几乎没有差别,本文重点列举一些二者的差异化用法:1.1 处理字符串时 >> s = 'world' >> print('hello %s'%...
Otto Hintze, ‘Typologie der ständischen Verfassungen des Abendlandes’,HZ, 141 (1930): 229–53; Otto Hintze, ‘Wesen und Wandlung des modernen Staates’,SPAW(1931): 790–910; Otto Hintze. ‘Weltgeschichtliche Betrachtungen der Repräsentativverfassungen’,HZ, 143 (1931): 1–47. ...