C + + calls Python

This article explains C + + 's method of invoking Python with instance code.


This article implements three functions in Util.h:

1. Init_log: Initialize log with Google log (Glog)
2. Exe_command: Shell code executed by C + +
3. exe_py:c++ calling Python file

Code:

Include/util.h:

/***************************************************************************  *- * Copyright (c) Baidu.com, Inc. All Rights Reserved * * * * * * * *********************************************************************/-                                                                            - -/** * @file util.h * @author ZHANGRUIQING01 ([email protected]) * @date 2015/10                                                       /24 02:17:56 * @version $Revision $-                                                                         * @brief-* I **/                                                                         #ifndef __util_h_#define __UTIL_H_#include "glog/logging.h"#include <string>#include <vector>#define Python_lib_path "~/.jumbo/lib/python2.7"#define Python_bin_path "~/.jumbo/bin/python2.7"//Initial logvoidInit_log (Const Char* argv);//EXE shell commandChar* Exe_command (Const Char* cmd);//EXE python commandvoidExe_py (Const STD::stringModule_name,Const STD::stringFunc_name,Const STD:: Vector<std::string>& args);

Src/util.cpp:

/***************************************************************************      *- * Copyright (c) Baidu.com, Inc.                                                                               All Rights Reserved * * **************************************************************************/-                                                                                - -/** * @file src/util.cpp * @author ZHANGRUIQING01 ([email protected]) * @                                                           Date 2015/10/24 02:12:34 * @version $Revision $-                                                                              * @brief-*-- **/                                                                             #include "util.h"#include <stdio.h>#include <errno.h>#include <Python.h>#define MAX_LENGTH 2048voidInit_log (Const Char* argv) {if(!getenv ("Glog_logtostderr")) {Google::logtostderr (); } Google::installfailuresignalha                                           Ndler ();                                                 Google::initgooglelogging (argv); LOG (INFO) <<"Create Log successfully"; }Char* Exe_command (Const Char* cmd) {file* fres;if(Fres = Popen (cmd,"R")) = NULL) {Char* Buf_res = (Char*)malloc(Max_length); Fread (Buf_res, Max_length,1, fres); buf_res[strlen(buf_res)-3] =' + ';//buf_res        fprintf(stderr,"------------\nexe RESULT:%s\n------------\ n", buf_res); Pclose (FRES);returnBuf_res; }Else{LOG (FATAL) <<"Failed to execute "<< cmd <<"'"; }                                                                            }voidExe_py (Const STD::stringModule_name,Const STD::stringFunc_name,Const STD:: Vector<std::string>& args) {STD::stringArgs_str =""; for(Auto& Arg:args) {args_str + = arg +","; }STD::stringcmd ="Ld_library_path="+STD::string(Python_lib_path) +":"+"$LD _library_path"+STD::string(Python_bin_path) +"-C ' import sys\n"+"Sys.path.append (\" pyfiles\ ") \ n"+"Import"+ Module_name +"\ n"+"ret ="+ Module_name +"."+ Func_name +"(["+ Args_str +"]) '"; LOG (INFO) <<"EXEC command:"<< cmd;Char* res = Exe_command (Cmd.c_str ()); }

Main.cpp:

/***************************************************************************          *- * Copyright (c) Baidu.com, Inc.                                                                                   All Rights Reserved * * **************************************************************************/-                                                                                    - -/** * @file src/util.cpp                                   * @author ZHANGRUIQING01 ([email protected])                                                               * @date 2015/10/23 10:41:23 * @version $Revision $-                                                                            * @brief- *--                                                                                  **/                                                                                 #include <stdio.h>#include <vector>#include <string>#include <util.h>#include <iostream>intMainintargcChar* argv[]) {//initial LogInit_log (argv[0]);Charcmd[ -]="Echo ' abc '";Char* res = Exe_command (cmd);STD::stringArg_v[] = {"1"};STD:: Vector<std::string>Py_args (Arg_v, Arg_v +sizeof(ARG_V)/sizeof(arg_v[0])); Exe_py ("Printargs","PR", Py_args);

Note the makefile file:

1. The directory where include Python.h is required, the Include directory for Python
2. C + + compilation parameters added-std=c++11:
   Cxxflags ('-g-pipe-w-wall-fpic-std=c++11 ')
3. directory where include Glog

Finally look at the structure of the program in this article:

Execution Result:

Copyright NOTICE: This article for Bo Master original article, without Bo Master permission not reproduced.

C + + calls Python