Python Contains Unnecessary Strings When Retrieving Version Information from an exe File

import array, ctypes, os

defaultFileVersionInfo(name):
    if notos.path.exists(name):
        raise RuntimeError("The file%s does not exist"%name)
    size = ctypes.windll.version.GetFileVersionInfoSizeW(name,None)
    if not size:
        raise RuntimeError ("No version information")
    res=ctypes.create_string_buffer(size)
    ctypes.windll.version.GetFileVersionInfoW(name,None,size,res)
    r=ctypes.c_uint()
    l=ctypes.c_uint()
    ctypes.windll.version.VerQueryValueW(res,u'\\VarFileInfo\\Translation',
        ctypes.byref(r), ctypes.byref(l))
    if not l.value:
        raise RuntimeError ("No codepage")
    codepage=array.array('H', ctypes.string_at(r.value,4))
    codepage="%04x%04x"%tuple(codepage)
    if not ctypes.windll.version.VerQueryValueW(res, u'\\StringFileInfo\\%s\\%s'%(codepage, "ProductName"), ctypes.byref(r), ctypes.byref(l)):
        raise RuntimeError ("Invalid or unavailable version info")
    else:
        return ctypes.wstring_at(r.value, l.value)

name = "C:\\programs\test.exe"
verInfo=getFileVersionInfo(name)
print(repr(verInfo))

'TestApp\x004\x0e\x01Pro'