2012-07-20 65 views
0

我想在我沒有root權限的計算機上運行python腳本。爲此,我使用Python 2.7創建了一個virtualenv,然後添加了我需要並行Python和SQLAlchemy的兩個包。當我運行該腳本,我得到這個錯誤:在virtualenv SQLAlchemy錯誤

(virtPython)thaddeus:recipes ab940$ python2.7 matchIngsParallel.py 
Starting pp with 8 workers 
Reading ingredients into dictionary 
Traceback (most recent call last): 
    File "matchIngsParallel.py", line 65, in <module> 
    for synonym, parentIng in session.query(IngSyn.synonym, IngSyn.parentIng): 
    File "build/bdist.macosx-10.6-intel/egg/sqlalchemy/orm/query.py", line 2227, in  __iter__ 
    File "build/bdist.macosx-10.6-intel/egg/sqlalchemy/orm/query.py", line 2242, in  _execute_and_instances 
    File "build/bdist.macosx-10.6-intel/egg/sqlalchemy/engine/base.py", line 1449, in execute 
    File "build/bdist.macosx-10.6-intel/egg/sqlalchemy/engine/base.py", line 1584, in _execute_clauseelement 
    File "build/bdist.macosx-10.6-intel/egg/sqlalchemy/engine/base.py", line 1698, in _execute_context 
    File "build/bdist.macosx-10.6-intel/egg/sqlalchemy/engine/base.py", line 1691, in _execute_context 
    File "build/bdist.macosx-10.6-intel/egg/sqlalchemy/engine/default.py", line 331, in do_execute 
sqlalchemy.exc.OperationalError: (OperationalError) no such table: ingSyns u'SELECT  "ingSyns".synonym AS "ingSyns_synonym", "ingSyns"."parentIng" AS "ingSyns_parentIng" \nFROM  "ingSyns"'() 

它好像一切都被正確導入但數據庫沒有被正確訪問。

的腳本如下:

from assignDB import * 
from sqlalchemy.orm import sessionmaker 
import pp, sys 

ppservers =() 

job_server = pp.Server(ppservers=ppservers) 

print "Starting pp with", job_server.get_ncpus(), "workers" 

print "Reading ingredients into dictionary" 
ingreds = {} 
for synonym, parentIng in session.query(IngSyn.synonym, IngSyn.parentIng): 
    ingreds[synonym] = parentIng 
print "Finished reading ingredients" 

(該代碼被縮短,但包括其中發生錯誤的地方)

assignDB看起來像這樣:

from sqlalchemy import Column, Integer, String, ForeignKey, create_engine, Table 
from sqlalchemy.ext.declarative import declarative_base 
from sqlalchemy.orm import relationship, backref, sessionmaker 
from sqlalchemy.dialects.sqlite import DATETIME, REAL 

engine = create_engine('sqlite:///recDB.db') 
Session = sessionmaker(bind=engine) 
session = Session() 
Base = declarative_base() 

隨後類定義。

我試過這個腳本在其他計算機上(我有root權限,但是),包括其他virtualenvs,它工作正常。我很困惑會發生什麼問題!

回答

1

您的腳本可以訪問數據庫,但似乎沒有表格。我想你從另一臺機器複製了腳本,你是否也複製了SQLite數據庫文件recDB.db

+0

是的,我正在訪問一個保管箱文件夾,所以它在所有機器上都是一樣的。我認爲virtualenv調用導入的方式存在一些問題,特別是'assignDB'?如果它在創建引擎時找不到數據庫,它會不會傳遞錯誤? – abroekhof 2012-07-20 13:30:28

+0

如果SQLite驅動程序找不到該文件,它會創建它,因此您不會在那裏看到錯誤。 ''sqlite:/// recDB.db''是一個相對於你當前工作目錄的路徑,我想你在啓動你的python外殼之後,進入dropbox文件夾?你的'assignDB'導入成功了,否則你的腳本的第一行會出現'ImportError'。是什麼讓你認爲這是一個進口問題? – Simon 2012-07-20 16:16:37