wrapper

问题 I am new both in Python and ibapi, I have ask Interactive Broker itself, they told me only : The self.done is originally defined in the parent class EClient that is used to indicate the current API connection is "done". You should not use it as an indicator to stop a loop that is build by yourself. You can keep one API client connection live until you have finished downloaded all the historical data you need. If you need to slow down the pace in requesting data, you can use other thread

问题 I need to write a class to wrap classes from third-party packages. Usually, the third-party class has methods that return third-party class instances. The wrapped versions of these methods have to convert those instances into instances of the wrapped class, but I can't make it work. I'm using Python 2.7 with new-style classes. Based on Create a wrapper class to call a pre and post function around existing functions?, I've got the following. import copy class Wrapper(object): __wraps__ = None

问题 I want to make a program that will retrieve some information a url. For example i give the url below, from librarything How can i retrieve all the words below the "TAGS" tab, like Black Library fantasy Thanquol & Boneripper Thanquol and Bone Ripper Warhammer ? I am thinking of using java, and design a data mining wrapper, but i am not sure how to start. Can anyone give me some advice? EDIT: You gave me excellent help, but I want to ask something else. For every tag we can see how many times

问题 I'm trying to build a dynamic library for android wrapper around libcrypto.a as described in http://wiki.openssl.org/index.php/FIPS_Library_and_Android#Using_FIPS_OpenSSL_in_a_real_Application I've produced the libcrypto.a as suggested on the page, but when I try to compile my wrapper.c I get a linker error, multiple definition of 'atexit' Here's the command line I'm using to compile: arm-linux-androideabi-gcc wrapper.c -fPIC -shared -I/usr/local/ssl/android-14/include -Wl,-Bstatic -lcrypto

问题 I have written a C++ method from which I need to return a structure to Python. I'm already able to send an OpenCV mat from Python to C++ using BOOST following the method described in this link. Now I need to go the other way; return from C++ to Python, and then access that structure in Python. Can it be done? Any samples or reference links would be good. I have tried googling before posting this question and I couldn't get any samples or explanation links. 回答1: You can use another function

问题 I just wrapped a Fortran 90 subroutine to python using F2PY. The subtlety here is that the Fortran subroutine aslo takes a python call-back function as one of its arguments: SUBROUTINE f90foo(pyfunc, a) real(kind=8),intent(in) :: a !f2py intent(callback) pyfunc external pyfunc !f2py real*8 y,x !f2py y = pyfunc(x) !*** debug begins*** print *, 'Start Loop' do i=1,1000 p = pyfunc(a) end do total = etime(elapsed) print *, 'End: total=', total, ' user=', elapsed(1), ' system=', elapsed(2) stop !*

问题 I have a Cocoa project (a Mac OS X app), all Objective-C. I pulled in one C++ class (which I know works) from another project, and make an Objective-C wrapper for it. The ObjC wrapper class is using a .mm extension. However, the C++ header file contains #include s to standard C++ header files ( <vector> , for example), and I get errors on those. A minimal example would look like the following. CppClass is the C++ class, and CppWrapper is the ObjC class which wraps it. // CppClass.h #ifndef

问题 As Java 5 have autoboxing, why I can't use Comparator to sort primitives? An int wouldn't be wrapped into a Integer ? 回答1: Arrays.sort(..) have dedicated overloadings for sorting primitive arrays. If you need any special sorting rules apart from the standard ones, I'm afraid you'd have to use autoboxing. In addition to that, you'd have to transform your array to Integer[] , because int[] is not autoboxed. And if you are not talking about arrays, but about collections - then you have no choice

问题 I want to be notified when a SocketChannel has its close method called. My first thought was to create a wrapper which notifies a listener when the implCloseSelectableChannel method is called (since the close method itself is declared final in AbstractInterruptibleChannel ). This solution works, but when I tried to register it with a Selector I would get an IllegalSelectorException because of the following check in SelectorImpl : /* */ protected final SelectionKey register

问题 I am wrapping up an MFC extension DLL (MFCXDLL_2) to make its functionality available for C# programmers. The wrapper is a “Regular DLL using shared MFC DLL” with “Common Language Runtime Support (/clr)”. (Mixed mode). The classes in MFCXDLL_2 that shall be available are decorated in MFCXDLL_3. The scenario I am experiencing is the case where MFCXDLL_2 is used from a C# .NET user control running in a native application. Another MFC Extension DLL -MFCXDLL_1-inside the native application also