我正在努力
-Windows 10 64位
-Swig 3.0.12，我从http://www.swig.org/download.html下载
在win32上运行3.5.4 [MSC v.1900 64位（AMD64）]
-MinGW7.3.0 64位
这是我第一次使用swig使用c ++代码扩展我的python应用程序。我试图编译swig官方网站a link的示例代码。 Python 3.5已经在libs文件夹中的libpython.a了，需要用mingw编译，所以我用它。我按照a link的教程进行操作！在Windows中编译swig。
具体来说，我执行以下操作
swig -python -c example.i
gcc -c * .c
gcc -c example_wrap.cxx -Ic：\ python35 \ include
gcc -shared * .o -o _example.pyd -Lc：\ python35 \ libs -lpython35
到此为止，一切都好！
但是当我尝试在Python35中导入它时，我收到以下错误消息
Microsoft Windows [版本10.0.17763.379]（c）2018 Microsoft Corporation。版权所有。
蟒蛇
导入示例
example.fact（3）
回溯（最近一次调用最后一次）：TypeError中的文件“”，第1行：在方法'fact'中，类型'int'的参数1
错误在哪里？
/* File : example.c */
double My_variable = 3.0;
/* Compute factorial of n */
int fact(int n) {
if (n <= 1)
return 1;
else
return n*fact(n-1);
}
/* Compute n mod m */
int my_mod(int n, int m) {
return(n % m);
}
/* File : example.i */
%module example
%{
/* Put headers and other declarations here */
extern double My_variable;
extern int fact(int);
extern int my_mod(int n, int m);
%}
extern double My_variable;
extern int fact(int);
extern int my_mod(int n, int m);
# This file was automatically generated by SWIG (http://www.swig.org).
# Version 3.0.12
#
# Do not make changes to this file unless you know what you are doing--modify
# the SWIG interface file instead.
from sys import version_info as _swig_python_version_info
if _swig_python_version_info >= (2, 7, 0):
def swig_import_helper():
import importlib
pkg = __name__.rpartition('.')[0]
mname = '.'.join((pkg, '_example')).lstrip('.')
try:
return importlib.import_module(mname)
except ImportError:
return importlib.import_module('_example')
_example = swig_import_helper()
del swig_import_helper
elif _swig_python_version_info >= (2, 6, 0):
def swig_import_helper():
from os.path import dirname
import imp
fp = None
try:
fp, pathname, description = imp.find_module('_example', [dirname(__file__)])
except ImportError:
import _example
return _example
try:
_mod = imp.load_module('_example', fp, pathname, description)
finally:
if fp is not None:
fp.close()
return _mod
_example = swig_import_helper()
del swig_import_helper
else:
import _example
del _swig_python_version_info
try:
_swig_property = property
except NameError:
pass # Python < 2.2 doesn't have 'property'.
try:
import builtins as __builtin__
except ImportError:
import __builtin__
def _swig_setattr_nondynamic(self, class_type, name, value, static=1):
if (name == "thisown"):
return self.this.own(value)
if (name == "this"):
if type(value).__name__ == 'SwigPyObject':
self.__dict__[name] = value
return
method = class_type.__swig_setmethods__.get(name, None)
if method:
return method(self, value)
if (not static):
if _newclass:
object.__setattr__(self, name, value)
else:
self.__dict__[name] = value
else:
raise AttributeError("You cannot add attributes to %s" % self)
def _swig_setattr(self, class_type, name, value):
return _swig_setattr_nondynamic(self, class_type, name, value, 0)
def _swig_getattr(self, class_type, name):
if (name == "thisown"):
return self.this.own()
method = class_type.__swig_getmethods__.get(name, None)
if method:
return method(self)
raise AttributeError("'%s' object has no attribute '%s'" % (class_type.__name__, name))
def _swig_repr(self):
try:
strthis = "proxy of " + self.this.__repr__()
except __builtin__.Exception:
strthis = ""
return "<%s.%s; %s >" % (self.__class__.__module__, self.__class__.__name__, strthis,)
try:
_object = object
_newclass = 1
except __builtin__.Exception:
class _object:
pass
_newclass = 0
def fact(arg1):
return _example.fact(arg1)
fact = _example.fact
def my_mod(n, m):
return _example.my_mod(n, m)
my_mod = _example.my_mod
# This file is compatible with both classic and new-style classes.
cvar = _example.cvar
-fpic可能会丢失gcc，但这是一个VS2017 64位解决方案作为使用Python 3.6（64位版本的编译器和Python）的工作示例。
使用你的确切example.i和example.c：
C:\example>swig -python example.i
C:\example>cl /MD /LD /W3 /Ic:\python36\include /Fe_example.pyd example_wrap.c example.c /link /libpath:c:\python36\libs
Microsoft (R) C/C++ Optimizing Compiler Version 19.16.27027.1 for x64
Copyright (C) Microsoft Corporation. All rights reserved.
example_wrap.c
example.c
Generating Code...
Microsoft (R) Incremental Linker Version 14.16.27027.1
Copyright (C) Microsoft Corporation. All rights reserved.
/dll
/implib:_example.lib
/out:_example.pyd
/libpath:c:\python36\libs
example_wrap.obj
example.obj
Creating library _example.lib and object _example.exp
C:\example>py
Python 3.6.8 (tags/v3.6.8:3c6b436a57, Dec 24 2018, 00:16:47) [MSC v.1916 64 bit (AMD64)] on win32
Type "help", "copyright", "credits" or "license" for more information.
>>> import example
>>> example.cvar.My_variable
3.0
>>> example.fact(3)
6
>>> example.my_mod(7,2)
1
你也可以使用distutils并创建一个setup.py（ref）
from distutils.core import setup, Extension
example_module = Extension('_example',
sources=['example.i', 'example.c'],
)
setup (name = 'example',
version = '0.1',
author = "SWIG Docs",
description = """Simple swig example from docs""",
ext_modules = [example_module],
py_modules = ["example"],
)
命令：
py setup.py build_ext --inplace