Qt C++；Python中的代码，PyQt4

我需要使用动态库，用python代码在Qt/C++上编写

我找到了这个工具 我在使用它时遇到了问题

所以，我有C++ C++库的文件 你好，h

// Define the interface to the hello library.
#include <qlabel.h>
#include <qwidget.h>
#include <qstring.h>

class Hello : public QLabel {
    // This is needed by the Qt Meta-Object Compiler.
    Q_OBJECT

public:
    Hello(QWidget *parent);

private:
    // Prevent instances from being copied.
    Hello(const Hello &);
    Hello &operator=(const Hello &);
};

proj.pro

QT       += core gui

TARGET = hello

TEMPLATE = lib

SOURCES += hello.cpp
HEADERS  += hello.h

我用qmake-qt4编译它 然后使用make，并获取这些sw文件

-rwxr-xr-x 1 alex alex 630459 Dec 15 00:03 hello.so
lrwxrwxrwx 1 alex alex     17 Dec 15 00:01 libhello.so -> libhello.so.1.0.0
lrwxrwxrwx 1 alex alex     17 Dec 15 00:01 libhello.so.1 -> libhello.so.1.0.0
lrwxrwxrwx 1 alex alex     17 Dec 15 00:01 libhello.so.1.0 -> libhello.so.1.0.0
-rwxr-xr-x 1 alex alex  21295 Dec 15 00:01 libhello.so.1.0.0

然后，Ia拥有用于SIP配置的文件

configure.py

import os
import sipconfig
from PyQt4 import pyqtconfig

# The name of the SIP build file generated by SIP and used by the build
# system.
build_file = "hello.sbf"

# Get the PyQt configuration information.
config = pyqtconfig.Configuration()

# Get the extra SIP flags needed by the imported PyQt modules.  Note that
# this normally only includes those flags (-x and -t) that relate to SIP's
# versioning system.
pyqt_sip_flags = config.pyqt_sip_flags

# Run SIP to generate the code.  Note that we tell SIP where to find the qt
# module's specification files using the -I flag.
os.system(" ".join([config.sip_bin, "-c", ".", "-b", build_file, "-I", config.pyqt_sip_dir, pyqt_sip_flags, "hello.sip"]))

# We are going to install the SIP specification file for this module and
# its configuration module.
installs = []

installs.append(["hello.sip", os.path.join(config.default_sip_dir, "hello")])

installs.append(["helloconfig.py", config.default_mod_dir])

# Create the Makefile.  The QtGuiModuleMakefile class provided by the
# pyqtconfig module takes care of all the extra preprocessor, compiler and
# linker flags needed by the Qt library.
makefile = pyqtconfig.QtGuiModuleMakefile(
    configuration=config,
    build_file=build_file,
    installs=installs
)

# Add the library we are wrapping.  The name doesn't include any platform
# specific prefixes or extensions (e.g. the "lib" prefix on UNIX, or the
# ".dll" extension on Windows).
makefile.extra_libs = ["hello"]

# Generate the Makefile itself.
makefile.generate()

# Now we create the configuration module.  This is done by merging a Python
# dictionary (whose values are normally determined dynamically) with a
# (static) template.
content = {
    # Publish where the SIP specifications for this module will be
    # installed.
    "hello_sip_dir":    config.default_sip_dir,

    # Publish the set of SIP flags needed by this module.  As these are the
    # same flags needed by the qt module we could leave it out, but this
    # allows us to change the flags at a later date without breaking
    # scripts that import the configuration module.
    "hello_sip_flags":  pyqt_sip_flags
}

# This creates the helloconfig.py module from the helloconfig.py.in
# template and the dictionary.
sipconfig.create_config_module("helloconfig.py", "helloconfig.py.in", content)

你好，sip

// Define the SIP wrapper to the hello library.

%Module hello

%Import QtGui/QtGuimod.sip

%If (Qt_4_2_0 -)

class Hello : public QLabel {

%TypeHeaderCode
#include <hello.h>
%End

public:
    Hello(QWidget *parent /TransferThis/ = 0);

private:
    Hello(const Hello &);
};


%End

然后我用

 $ python ./configure.py 

那我犯了一个错误

/usr/bin/ld: cannot find -lhello
collect2: error: ld returned 1 exit status
make: *** [hello.so] Error 1

但这是一个简单的问题，可以通过添加-L来解决。

我有新的。所以在我的目录中-hello.so

然后，我使用简单的python脚本来测试结果

import hello
h = hello.Hello()
print h

我有一个错误

Ever/ QtExample $ python ./pythontest.py  Traceback (most recent call last):   File "./pythontest.py", line 1, in <module>
    import hello ImportError: libhello.so.1: cannot open shared object file: No such file or directory

Ever/QtExample$python./pythontest.py回溯（最近一次调用）：文件“/pythontest.py”，第1行，在
导入hello ImportError:libhello.so.1:无法打开共享对象文件：没有这样的文件或目录

---

我的错误在哪里？我做错了什么？

您是否运行了

makeinstall

？这应该将libhello.so添加到/usr/lib中

---

如果这只是一个测试库，而您不想安装它，那么您应该将

libhello.so

放在您拥有hello模块的同一文件夹中，或者将

libhello.so

的文件夹路径添加到

LD\u library\u path

环境变量中。

您还没有将libhello.so.1文件放在系统库路径中。所以在制作时需要指定-L。显然，您还需要在运行时指定库路径，但您还没有这样做。尝试将LIBPATH或LD_LIBRARY_PATH环境变量设置为包含libhello.so.1文件的目录。另外，可能还有一种特定于python的方法来添加库路径。另见

import hello
h = hello.Hello()
print h

Ever/ QtExample $ python ./pythontest.py  Traceback (most recent call last):   File "./pythontest.py", line 1, in <module>
    import hello ImportError: libhello.so.1: cannot open shared object file: No such file or directory