我希望借助StackOverflow来部署此软件!
此软件使用ctypes.cdll.LoadLibrary加载dll。部署后(由py2exe纠缠),该dll被藏在包含目录结构的zip中。 dll在此结构中有几个层次。 (我不确定这是否是一个相关的细节。)LoadLibrary失败,因为它找不到dll,因为它的路径是...\site.zip\app\dll32\lfx.dll
。
我在SO或Google上找不到任何相关内容。我正在考虑对LoadLibrary调用进行try-except,并在except块中,检查给定的路径是否指向压缩位置,然后解压缩并重试。
是否有更优美的方式从zip加载dll?
列出[Python 3.Docs]: ctypes - A foreign function library for Python。
为了加载。dll,CTypes使用:
两者都需要FS]上存在的[[有效文件名](或NULL,但这与此处无关)。您提供的文件名不符合标准,因为FS在路径中存在时不会自动处理。zip(或其他)文件。因此。dll在加载之前需要先解压。有多种方法可以执行此操作,以下是使用Context Manager([Python 3.Docs]: Data model - With Statement Context Managers)或CM的方法。 code00.py#!/usr/bin/env python
import sys
import ctypes as ct
import zipfile as zf
import os
if sys.platform[:3].lower() == "win":
from ctypes import wintypes as wt
unload_lib = ct.WinDLL("kernel32.dll").FreeLibrary
unload_lib.argtypes = [wt.HMODULE]
unload_lib.restype = wt.BOOL
else:
unload_lib = ct.CDLL(None).dlclose
unload_lib.argtypes = [ct.c_void_p]
unload_lib.restype = ct.c_int
class ZippedDll():
def __init__(self, zip_file_name, member_file_name, loader=ct.CDLL, extract_path=None, suppress_exceptions=False):
self.zip_file_name = zip_file_name
self.member_file_name = member_file_name
self.loader = loader
self.extract_path = extract_path
self.suppress_exceptions = suppress_exceptions
self.dll_path = None
self.dll = None
def __enter__(self):
self.dll_path = os.path.join(self.extract_path, self.member_file_name) if self.extract_path else self.member_file_name
if os.path.exists(self.dll_path):
self.dll_path = None
raise OSError("Target file already exists")
with zf.ZipFile(self.zip_file_name) as zip_file:
zip_file.extract(self.member_file_name, path=self.extract_path if self.extract_path else None)
try:
self.dll = self.loader(self.dll_path)
except OSError:
if not self.__exit__(*sys.exc_info()):
raise
return self.dll
def __exit__(self, exc_type, exc_val, exc_tb):
if self.dll:
unload_lib(self.dll._handle)
self.dll = None
if self.dll_path and os.path.isfile(self.dll_path):
os.unlink(self.dll_path)
self.dll_path = None
return self.suppress_exceptions
def main(*argv):
with ZippedDll("arch.zip", "dir00/dll00.dll", loader=ct.WinDLL) as dll:
print(dll._name, dll.dll00Func00)
if __name__ == "__main__":
print("Python {0:s} {1:d}bit on {2:s}\n".format(" ".join(item.strip() for item in sys.version.split("\n")), 64 if sys.maxsize > 0x100000000 else 32, sys.platform))
main(*sys.argv[1:])
print("\nDone.")
:Notes
e:\Work\Dev\StackOverflow\q060348430>"e:\Work\Dev\VEnvs\py_pc064_03.07.06_test0\Scripts\python.exe" code00.py
Python 3.7.6 (tags/v3.7.6:43364a7ae0, Dec 19 2019, 00:42:30) [MSC v.1916 64 bit (AMD64)] 64bit on win32
dir00/dll00.dll <_FuncPtr object at 0x000002A045422E18>
Done.