Python ctypes找不到依赖库

Question

我在尝试在OSX上使用python 3.4（在ipython中）使用ctypes加载依赖库时遇到了很多麻烦。我试图加载libps3000a.dylib，这取决于libpicoipp.1.dylib：

import os 

print(os.path.exists("/Applications/PicoScope6.app/Contents/Resources/lib/libps3000a.dylib")) 
print(os.path.exists("/Applications/PicoScope6.app/Contents/Resources/lib/libpicoipp.1.dylib")) 

%env DYLD_LIBRARY_PATH /Applications/PicoScope6.app/Contents/Resources/lib 
%env LD_LIBRARY_PATH /Applications/PicoScope6.app/Contents/Resources/lib 

from ctypes import cdll 
lib = cdll.LoadLibrary("/Applications/PicoScope6.app/Contents/Resources/lib/libps3000a.dylib") 

和输出我得到的是以下几点：

True 
True 
env: DYLD_LIBRARY_PATH=/Applications/PicoScope6.app/Contents/Resources/lib 
env: LD_LIBRARY_PATH=/Applications/PicoScope6.app/Contents/Resources/lib 
--------------------------------------------------------------------------- 
OSError         Traceback (most recent call last) 
<ipython-input-54-df3a8f6477f6> in <module>() 
     8 
     9 from ctypes import cdll 
---> 10 lib = cdll.LoadLibrary("/Applications/PicoScope6.app/Contents/Resources/lib/libps3000a.dylib") 

/Users/jeremy/anaconda/lib/python3.4/ctypes/__init__.py in LoadLibrary(self, name) 
    427 
    428  def LoadLibrary(self, name): 
--> 429   return self._dlltype(name) 
    430 
    431 cdll = LibraryLoader(CDLL) 

/Users/jeremy/anaconda/lib/python3.4/ctypes/__init__.py in __init__(self, name, mode, handle, use_errno, use_last_error) 
    349 
    350   if handle is None: 
--> 351    self._handle = _dlopen(self._name, mode) 
    352   else: 
    353    self._handle = handle 

OSError: dlopen(/Applications/PicoScope6.app/Contents/Resources/lib/libps3000a.dylib, 6): Library not loaded: libpicoipp.1.dylib 
    Referenced from: /Applications/PicoScope6.app/Contents/Resources/lib/libps3000a.dylib 
    Reason: image not found 

谁能告诉我什么，我做错了什么？

Answer 1

它看起来像我找到了解决方案。如果您在ipython内核中运行，则ipython中的％env指令不会影响dlopen调用。我将提交一份错误报告。