args

Django class based views - request, args and kwargs objects

由 女生的网名这么多〃 提交于 2019-12-11 01:54:09
问题 It seems to me that in Django's generic class-based views, the parameters request , args and kwargs travel from method to method, both as view instance attributes, as well as method arguments. What do I mean exactly? Class django.views.generic.base.View , defines the following function, called by its as_view method: def view(request, *args, **kwargs): self = cls(**initkwargs) if hasattr(self, 'get') and not hasattr(self, 'head'): self.head = self.get self.request = request self.args = args

During Java applet startup, what does “Running JVM args match the secure subset” mean?

由 房东的猫 提交于 2019-12-11 01:50:00
问题 I am trying to run remote debugging on a Java applet, but cannot get the applet to connect to the debugger (Eclipse) nor will it suspend. During startup, I get the following: ... Match: digesting vmargs: -Djava.compiler=NONE -Xdebug -Xrunjdwp:transport=dt_socket,address=8088,server=y,suspend=y Match: digested vmargs: [JVMParameters: isSecure: false, args: -Xdebug -Xrunjdwp:transport=dt_socket,address=8088,server=y,suspend=y -Djava.compiler=NONE] Match: JVM args after accumulation:

python: when can I unpack a generator?

由 喜夏-厌秋 提交于 2019-12-10 03:24:21
问题 How does it work under the hood? I don't understand the reason for the errors below: >>> def f(): ... yield 1,2 ... yield 3,4 ... >>> *f() File "<stdin>", line 1 *f() ^ SyntaxError: invalid syntax >>> zip(*f()) [(1, 3), (2, 4)] >>> zip(f()) [((1, 2),), ((3, 4),)] >>> *args = *f() File "<stdin>", line 1 *args = *f() ^ SyntaxError: invalid syntax 回答1: The *iterable syntax is only supported in an argument list of a function call (and in function definitions). In Python 3.x, you can also use it

Java Beanshell scripting with args[] to the the program?

由 ＊爱你＆永不变心＊ 提交于 2019-12-09 20:39:50
问题 The Beanshell documentation implies that you can run a script using this format on the command line: java bsh.Interpreter script.bsh [args] The only problem with this is that I cannot get it to work. I know how to call other scripts with args from a Beanshell script but I cannot get the initial script to take args. Help? For example, a beanshell script like this one, wont parse the args: import java.util.*; for (int i=0; i < args.length; i++) { System.out.println("Arg: " + args[i]); } Also,

Syntax error when trying to parse arguments Python shell

由 空扰寡人 提交于 2019-12-08 11:33:15
问题 I have some code that I am trying to run in a Python shell (IDLE) but there seems to be a problem with the way I am parsing arguments in the Python shell. Here is the code: # import the necessary packages from skimage.segmentation import slic from skimage.segmentation import mark_boundaries from skimage.util import img_as_float from skimage import io import matplotlib.pyplot as plt import argparse # construct the argument parser and parse the arguments ap = argparse.ArgumentParser() ap.add

How do you pass arguments from command line to main in Flutter/Dart?

由 一曲冷凌霜 提交于 2019-12-06 23:41:25
问题 How would you run a command and pass some custom arguments with Flutter/Dart so they can then be accessed in the main() call such as: flutter run -device [my custom arg] So then I can access it with: void main(List<String> args) { print(args.toString()); } Thank you. 回答1: There is no way to do that, because when you start an app on your device there are also no parameters that are passed. If this is for development, you can pass -t lib/my_alternate_main.dart to flutter run to easily switch

Singleshot: SLOT with arguments

由 我的未来我决定 提交于 2019-12-06 14:43:54
问题 I have a strange problem. Here is my code: def method1(self, arg1, delay=True): """This is a method class""" def recall(arg1): self.method1(arg1, delay=False) return if delay: print "A: ", arg1, type(arg1) QtCore.QTimer.singleShot(1, self, QtCore.SLOT(recall(int)), arg1) return print "B: ", arg1, type(arg1) So I get this in console: A: 0 <type 'int'> B: <type 'int'> <type 'type'> In "B" you should get the same than in "A". Anyone knows what's wrong? How can I get the arg1 value instead of its

How to properly round numpy float arrays

由 ＊爱你＆永不变心＊ 提交于 2019-12-06 09:22:06
问题 I have some sort of rounding issue when rounding floats. x = np.array([[1.234793487329877,2.37432987432],[1.348732847,8437.328737874]]) np.round(x,2) array([[ 1.23000000e+00, 2.37000000e+00], [ 1.35000000e+00, 8.43733000e+03]]) Is there a way to display these numbers without the zero extensions? 回答1: Rounding floating point numbers is almost never needed (unless you want to bucket them, then your code will work just fine), if you only want to print them with less precision, use this: print(np

Neatly pass positional arguments as args and optional arguments as kwargs from argparse to a function

由 落花浮王杯 提交于 2019-12-06 00:10:12
I would like to write a Python script that takes some necessary positional and some optional command-line arguments via argparse : Let's call the positional args a , b , c , and the optional arguments x , y , z . In my Python script, I would like to pass these args on to a function; specifically, I want a , b , c to be passed as *args , and x , y , z to be passed as **kwargs , the latter retaining their names. I would like to do this many times with different functions and different numbers of positional and optional arguments. Is there a neat, flexible, and/or pythonic way to do this? Here is

What does self do? [duplicate]

由 北城以北 提交于 2019-12-05 22:57:05
问题 This question already has answers here : Closed 8 years ago . Possible Duplicate: Python 'self' keyword Forgive me if this is an incredibly noobish question, but I never did understand self in Python. What does it do? And when I see things like def example(self, args): return self.something what do they do? I think I've seen args somewhere in a function too. Please explain in a simple way :P 回答1: It sounds like you've stumbled onto the object oriented features of Python. self is a reference
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