class

问题 I added two handlers with different formatters to my logger. The first one requires subclassing logging.Formatter to do custom formatting. The default formatter will suffice for the second handler. Let's say the first formatter simply removes newline characters from the message. The following script illustrates what seems like strange behavior: import logging logger = logging.getLogger(__name__) class CustomFormatter(logging.Formatter): def __init__(self, *args, **kwargs): super().__init__(

问题 Look this code: class MyClass_1(): @staticmethod def method_1(func): return func(1, 2, 3) class MyClass_2(): my_func = lambda a,b,c : a*b*c # I need to call this method def method_2(self): result = MyClass_1.method_1(self.my_func) print(result) My error: TypeError: () takes 3 positional arguments but 4 were given I need to call the lambda function my_func in the same way as the code above, but a self is appearing from somewhere I don't know and causing this error. What am I missing? 回答1:

问题 I am trying to sort a class array that has 5 values inside of it. 3 strings and 2 ints . I would like to sort the array from highest to lowest on the int values but can't figure out how to do so. My though process is to send the array into the class and then pull out the correct int value and sort for each array location without changing the other values of that location. How can I pull out these values so that I can sort them accordingly? If I could then I would know how to finish my code.

问题 I am trying to sort a class array that has 5 values inside of it. 3 strings and 2 ints . I would like to sort the array from highest to lowest on the int values but can't figure out how to do so. My though process is to send the array into the class and then pull out the correct int value and sort for each array location without changing the other values of that location. How can I pull out these values so that I can sort them accordingly? If I could then I would know how to finish my code.

问题 I thought that I realized this relationship: In Python everything is an object, and every object has a type. But what about classes? A class is a blueprint of an object, and an object is instance of a class. But I have read in an article that in Python, classes are themselves objects. I thought that an object cannot exist without its blueprint - its class. But, if class is an object, how it can exist? >>> type.__bases__ (<class 'object'>,) >>> int.__bases__ (<class 'object'>,) >>> str.__bases

问题 As I understand it: ES6 classes are basically constructor functions, right? Of course with the benefit of not having to write stuff like this: myFunction.prototype.myInheritablemethod= "someMethod"; Is this correct? I'm asking because I'm aware there is the module pattern and the revealing module pattern, but those are not what ES6 classes are about, right? 回答1: Classes were introduced to provide syntactic sugar around the existing prototypal inheritance model of JavaScript. The following...

问题 I go through an array of objects to display in my html some information boxes that are selectable. For it I bind a class in the event click, but as I obtain the elements through a v-for, when I select one it bind the class to all of them. How can I differentiate only the selected one? I have seen several examples with jquery but I would like to know if there is any other method. My template: <div class="list-services"> <div class='column-service' v-for='estimation in filteredEstimation' v

问题 This is my first post here. I've searched in the site, but inforutunaly no matchs. Anyway, i want to know how to use named parameters on a class. so the pdo basic form is something like. $query = $bdd->prepare('SELECT * FROM table WHERE login = :login AND pww = :pww'); $query->execute(array('login' => $login, 'pww' => $pww)); and i want to integrate this on a class regardless of the number of parameters. Currently, i have this code http://pastebin.com/kKgSkaKt and for parameters, i use

问题 I want to add an additional class to my kivy app that is just an info storage depot. I'm not sure where to do this or if this approach is even advised. The app has multiple screens. Each screen allows the user to make a selection. The user's selection is what I want to store in the additional class. The additional class will store data then ultimately use MQTT to send the data out. Also, I wanted to keep the class definition in a separate file so I could organize the program into logically

问题 I have the following class: class Foo(object): def setUp(self): self.var1 = "some value" self.var2 = something def bar(self): var3 = some value def baz(self, var): var4 = some value I want to print the names of all variables defined inside the methods, like: setUp, bar, baz, var1, var2, var3, var4 I have tried using locals(), vars(), globals() but I am getting only the names of method and not variable names. I also tried using ast module, but no success. 回答1: class Foo(object): def setUp(self