init

问题 I have a question related this one: How to handle the validation of the model form when the model has a clean method if the model form excluded some fields? This is my model: class StudentIelts(Model): SCORE_CHOICES = [(float(i/2), float(i/2)) for i in range(0, 19)] IELTS_TYPE_CHOICES = [('General', 'General'), ('Academic', 'Academic'), ] student = OneToOneField(Student, on_delete=CASCADE) has_ielts = BooleanField(default=False, ) ielts_listening = FloatField(choices=SCORE_CHOICES, null=True,

问题 This question already has an answer here : Keyword only parameter (1 answer) Closed 12 months ago . So I'm pretty new to Python and there is this library I want to work with. However there is an argument in the constructor of the class which I can't find anything about. init method looks like this: def __init__(self, ain1, ain2, bin1, bin2, *, microsteps=16): What does the * do? As far as I know the self is just the object itself and the others are just arguments. But what's the * ? Link to

问题 Source: Python and the Singleton Pattern According to most upvoted comment in the top answer init gets called multiple times if new returns class instance. So I checked this: class Singleton(object): _instance = None def __new__(cls, *args, **kwargs): print 'Singleton.__new__ called with class', cls if not cls._instance: cls._instance = super(Singleton, cls).__new__(cls, *args, **kwargs) return cls._instance class Cache(Singleton): def __init__(self, size=100): print 'I am called with size',

问题 I heard from someone that the state of a class is not yet stable inside -(id)init, so using 'self.something' is not recommended inside init, but I have a UIView subclass that need to add some subviews to itself when the class is created, so I have to use [self addSubview: subview] in init, or I have to have another initialisation method and after I create the view using: MyView *myView = [[MyView alloc] initWithFrame:frame]; I need to call that method. Is this correct? Does initWithFrame has

问题 I would like to read the next n integer from the input stream into an IntArray. I wrote the code below but as we discussed in Order of init calls in Kotlin Array initialization there is no guarantee that the initialization would start from index 0 and go one by one. Is there some similarly elegant solution for this which is not based on this possibly false (but as discussed in the other thread in all known implementations true) assumption? fun Scanner.readIntArray(n: Int): IntArray { return

问题 Hey I have a following problem, I need to open a file in __init__() , and with check function I need to check if strings/numbers in rows of this file are the same or not. If they aren't it should return True if they are it should return False , and if there are no more lines None . I do not know how many lines are there going to be in the file. My code is working kind of, tester is giving me 90%, but it says I do not close the file, I understand why it is saying, but do not know where to put

问题 I have a requirement where I need to develop application that reads TCP/IP Socket. I successfully made the program as Java program with No GUI means as soon as program runs it starts listening to the Socket and gets the response with the help of Netbeans IDE. Now as per my requirement i have to start execution of this program as soon as Linux system Booted. Actually I am very novice in Java and Linux Platform, so have few doubts.. Is my Socket Program with no GUI is fine to be run as per my

问题 Closed. This question is off-topic. It is not currently accepting answers. Want to improve this question? Update the question so it's on-topic for Stack Overflow. Closed 7 years ago . I am using fedora 15. I am trying to add MYSql daemon to start during system strtup. I have understood that I will have to add it to rc5.d as it is the default target & is graphical.target . from inittab : systemd uses 'targets' instead of runlevels. By default, there are two main targets: multi-user.target:

问题 This question was migrated from Unix & Linux Stack Exchange because it can be answered on Stack Overflow. Migrated 7 years ago . I was reading about linux kernel development and I just read some text that I don't understand. Here is the paragraph, which talks about the __init and __exit macros for modules: This demonstrates a feature of kernel 2.2 and later. Notice the change in the definitions of the init and cleanup functions. The __init macro causes the init function to be discarded and

问题 After searching around, I'm still confused whether you can have a docker container running Ubuntu with a working init system (upstart) and syslog , or not. I know docker containers are meant for running a single process and not a full OS, but my use case is testing a daemon on various linux distros, making sure the daemon starts, stops and restarts successfully on crashes, etc., with logging to syslog. So I'm trying to decide if I can use a docker container for this or maybe I would be better