warnings

问题 I couldn't remember if np.zeros(x) will automatically covert a float x to int or not, so I tried it in IDLE. What I got the first time was a Warning message that refers to the script I had run earlier in the same session, and then warns me "using a non-integer number instead of an integer will result in an error in the future". I tried it again, and the warning did not repeat, and the array was instantiated as expected with dtype=float . Why does the warning say there will be an error (as

问题 The code is short,but complete : function process($obj) { if(empty($obj))return 1; return 2; } echo process($arr['nosuchkey']); As we all know, calling empty($arr['nosuchkey']) will never report warnings. But process($arr['nosuchkey']) will report a notice. Is there a workaround without disabling warnings; say, by syntax? 回答1: You can use the error control operator @ but that will suppress a lot more than just notices. echo @process($arr['nosuchkey']); You would be better off checking before

问题 I have had this Warning lingering around the background of my project for quite a while now and I was told not to worry about it. However now I have other issues I figure now is probably the best time to enquire about it. (The best time was probably when I first occurred, but hey, too late for that now.) There was a mismatch between the processor architecture of the project being built "MSIL" and the processor architecture of the reference "C:\Users\Benjamin\Documents\Visual Studio 2010

问题 I am trying to set up fmincon with the active-set method for the linear constrained minimisation problem where minimising the objective function @fun such that but the trials firing odd errors more in the history. Trial 1 [x,fval]=fmincon(@fun, Guess, A, b) Trial 2 options = optimoptions('fmincon','Algorithm','active-set'); [x,fval]=fmincon(@fun, Guess, A, b, options) 回答1: You are using the wrong options for the algorithm. MATLAB looks at the parameters you provide and uses an algorithm that

问题 In a standard Android project, if there are any warnings there will be a corresponding Warning Icon as well as underlined text to clearly demonstate a potential issue. However, if you choose to clone an existing Mercurial repository, these warning icons are no longer displayed. Is there any way to show warnings and errors in a project that was created by cloning a Mercurial repository? The file on the left is from a local Android project. The file on the right is a Project that was cloned

问题 How might this block of code in Date/Manip.pm from the Date::Manip module: #*Get rid of a problem with old versions of perl no strict "vars"; # This sorts from longest to shortest element sub sortByLength { return (length $b <=> length $a); } use strict "vars"; I get this warning: Use of uninitialized value in length at /perl/lib/perl5.8/Date/Manip.pm line 244. 回答1: The problem is not actually located there; the function is just being called with invalid (undef) parameters. To get a better

问题 I am very new to iOS development and have encountered an error that I just can't seem to find a solution for. I have searched for solutions everywhere, but maybe it is my newness that is preventing me from seeing the problem. The exact warning that is printed in the log is: Attempt to dismiss from view controller <_UIAlertShimPresentingViewController: 0x7aaa4b90> while a presentation or dismiss is in progress! It occurs right after I touch a button on the actionSheet. Here is the code: -

问题 Assuming I write a python package that has to use the imp module, and my package is "TestModule" which is the following: import imp import pip import sys def update_and_reload(module, *args, **kwargs): pip.main(['install', module, '--upgrade', '--user']) return imp.reload(module) When I do import TestModule in the terminal, I get a pending deprecation warning on imp . How would I make imp 's warning not occur / filter out? 回答1: Well you could use the warning module: import warnings with

问题 I am having trouble running this program. The program takes an expression such as "A = 7" and puts the variable A (String) and the number 7 in a Map container. I'm not if i'm not parsing the string correctly which is causing the error or for some other reason. Exception in thread "main" java.util.InputMismatchException at java.util.Scanner.throwFor(Scanner.java:909) at java.util.Scanner.next(Scanner.java:1530) at java.util.Scanner.nextInt(Scanner.java:2160) at java.util.Scanner.nextInt

问题 Okay, I am confused. I am using two Python packages - PyPDF2 and SQLAlchemy. SQLAlchemy is raising a warning using python's warning.warn(), and somehow calling a formatWarning() function in PyPDF2, which also uses python's warning.warn(). Is this an error in SQLAlchemy or PyPDF2? How does this even happen - is formatWarning some special function? PyPDF2 defines it as: #custom implementation of warnings.formatwarning def formatWarning(message, category, filename, lineno, line=None): file =