Python Windows Error Access Violation
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Python Access Violation Writing
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Python Ctypes Windowserror Exception Access Violation Reading
the Stack Overflow Community Stack Overflow is a community of 6.2 million programmers, just like you, helping each other. Join them; it only takes a minute: Sign up Python: WindowsError: exception: access violation python access violation reading reading 0x00000000 up vote 0 down vote favorite This short function is simply getting the available free space of a storage device, however I am getting the above error when running the code. The function is: def disk_space1(drive): freespace = ctypes.c_ulonglong() calcspace = ctypes.windll.kernel32.GetDiskFreeSpaceExA calcspace(drive, ctypes.byref(freespace)) disk_size = freespace.value return disk_size This function worked perfectly until today when it has stopped working for no reason, I oserror: exception: access violation reading haven't changed anything. What's baffling me the most is that the function works properly, if I print out the value of 'freespace' once running it, it has gone and found the correct value, but still gives the error. What could have caused this issue? python ctypes violation windowserror share|improve this question asked Feb 20 '15 at 14:16 mattymanza365 1515 Consider using pywin32 - it is thin wrapper around Win32 API. I.e.: docs.activestate.com/activepython/2.7/pywin32/… –myaut Feb 20 '15 at 14:22 Thanks, I'll give that a try! –mattymanza365 Feb 20 '15 at 14:31 add a comment| 1 Answer 1 active oldest votes up vote 4 down vote accepted You are not calling the full function signature which I believe is leading to access violations (due to random memory writes) and errors. The full function signature is (fully documented here): BOOL WINAPI GetDiskFreeSpaceEx( _In_opt_ LPCTSTR lpDirectoryName, _Out_opt_ PULARGE_INTEGER lpFreeBytesAvailable, _Out_opt_ PULARGE_INTEGER lpTotalNumberOfBytes, _Out_opt_ PULARGE_INTEGER lpTotalNumberOfFreeBytes ); By changing the function to: def disk_space(drive): freespace = ctypes.c_ulonglong() calcspace = ctypes.windll.kernel32.GetDiskFreeSpaceExA err = calcspace(drive, ctypes.byref(freespace), None, None) assert err != 0, 'calcspace failed' disk_size = freespace.value return disk_size I was able to run it without intermittent er
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Oserror: Exception: Access Violation Writing
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Oserror Exception Access Violation Reading 0x00000000
like you, helping each other. Join them; it only takes a minute: Sign up WindowsError exception access violation - in simple python c++ ctypes interface up vote 5 down vote favorite I have a very simple test case http://stackoverflow.com/questions/28631078/python-windowserror-exception-access-violation-reading-0x00000000 that I can't get to work, I am trying to interface c++ with python using ctypes. I get errors when working with doubles, in this case trying to use "cout" in the c++. The error is: WindowsError: exception: access violation writing 0x..... The problem lies in the cout line of the following c++ code: #include "testgeo.h" #include
thread): WindowsError: exception: access violation writing 0x00000000 Messages sorted by: [ date ] [ thread ] [ subject ] [ author ] On Aug 4, 2009, at 11:25 AM, Sparky wrote: > On Aug 3, 3:29 https://mail.python.org/pipermail/python-list/2009-August/546509.html pm, Sparky
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