Strings in Python 3

Question

I am programing VIX API from python 2.5, but now I want to port the code to python 3.2

This function opens the virtual machine:

self.jobHandle = self.VixLib.vix.VixVM_Open(self.hostHandle,
                                            "C:\\MyVirtualMachine.vmx", None, None)

Previusly this function is imported from Vix.dll with this code:

vix.VixVM_Open.restype = VixHandle
vix.VixVM_Open.argtypes = [VixHandle,c_char_p,POINTER(VixEventProc),c_void_p]

In 2.5 this code is correct, but in 3.2 it returns ctypes.ArgumentError

What can I do?

I'm guessing this is related to the fact that all strings went unicode in 3.0, but I don't know what the solution is. — recursive
– recursive, Commented Sep 15, 2010 at 21:34
what is whole stack trace???sorry but I´m begginer in python — igferne
– igferne, Commented Sep 15, 2010 at 21:46
It's everything the interpreter dumps out to you when it hits an exception (everything surrounding the "ArgumentError") — Nick T
– Nick T, Commented Sep 15, 2010 at 21:51

PaulMcG · Accepted Answer · 2010-09-15 21:55:04Z

5

Your second argument has to be encoded to a format that the VIX API will understand, since Python 3.x now creates all strings as Unicode. The simplest approach would be to modify your second argument to read:

"C:\\MyVirtualMachine.vmx".encode('ascii','ignore')

which should give you a variable of type bytes, which should be more palatable to VIX.

answered Sep 15, 2010 at 21:55

PaulMcG

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igferne Over a year ago

Making this the problem was soluted!! thank you very much!! where can I vote you???

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