def get_process_exe(self):
        try:
            exe = os.readlink("/proc/%s/exe" % self.pid)
        except (__HOLE__, IOError):
            err = sys.exc_info()[1]
            if err.errno == errno.ENOENT:
                # no such file error; might be raised also if the
                # path actually exists for system processes with
                # low pids (about 0-20)
                if os.path.lexists("/proc/%s/exe" % self.pid):
                    return ""
                else:
                    # ok, it is a process which has gone away
                    raise NoSuchProcess(self.pid, self._process_name)
            if err.errno in (errno.EPERM, errno.EACCES):
                raise AccessDenied(self.pid, self._process_name)
            raise

        # readlink() might return paths containing null bytes causing
        # problems when used with other fs-related functions (os.*,
        # open(), ...)
        exe = exe.replace('\x00', '')
        # Certain names have ' (deleted)' appended. Usually this is
        # bogus as the file actually exists. Either way that's not
        # important as we don't want to discriminate executables which
        # have been deleted.
        if exe.endswith(" (deleted)") and not os.path.exists(exe):
            exe = exe[:-10]
        return exe
dataset/ETHPy150Open packages/psutil/psutil/_pslinux.py/Process.get_process_exe