Python Mox: Как подделать os.path.exists () только для определенных путей?

while ($row) 
{
echo "<tr><td>".$row['Last Name']."</td>";
echo "<td>".$row['First Name']."</td>";
echo "<td>".$row['Middle Name']."</td>";
echo "<td>".$row['Sfx']."</td>";
echo "<td>".$row['Prf']."</td>";
echo "<td>".$row['Spouse/SO']."</td>";
echo "<td>".$row['Ancestor']."</td>";
echo "<td>".$row['Status']."</td>";
echo "<td>".$row['Address 1']."</td>";
echo "<td>".$row['Address 2']."</td>";
echo "<td>".$row['City']."</td>";
echo "<td>".$row['ST']."</td>";
echo "<td>".$row['Zip 5']."</td>";
echo "<td>".$row['Zip 4']."</td>";
echo "<td>".$row['Home Phone']."</td>";
echo '<td><a href="mywebsite/mypage.php?id=' . $row['id'] . '">Bio</a></td></tr>';
  $row = mysql_fetch_array($results);

}

echo "</table><hr>";