>>> ================================ RESTART================================
>>> from pymongo import Connection
>>> c = Connection("mongodb://user:pswd@mongo/admin")
>>> c_users  = c["data"]["user"]
>>> users = c_users.find({}, ["_id"])
>>> users.count()
193845
>>> for u in users:
    s = u["_id"]

Traceback (most recent call last):
  File "<pyshell#24>", line 1, in <module>
    for u in users:
  File "build\bdist.win32\egg\pymongo\cursor.py", line 778, in next
    if len(self.__data) or self._refresh():
  File "build\bdist.win32\egg\pymongo\cursor.py", line 742, in _refresh
    limit, self.__id))
  File "build\bdist.win32\egg\pymongo\cursor.py", line 666, in __send_message
    **kwargs)
  File "build\bdist.win32\egg\pymongo\connection.py", line 907, in _send_message_with_response
    return self.__send_and_receive(message, sock_info)
  File "build\bdist.win32\egg\pymongo\connection.py", line 885, in __send_and_receive
    return self.__receive_message_on_socket(1, request_id, sock_info)
  File "build\bdist.win32\egg\pymongo\connection.py", line 877, in __receive_message_on_socket
    return self.__receive_data_on_socket(length - 16, sock_info)
  File "build\bdist.win32\egg\pymongo\connection.py", line 858, in __receive_data_on_socket
    chunk = sock_info.sock.recv(length)
MemoryError
>>>