comp.lang.python Google Group

Re: sqlite3, memory db and multithreading

2010-03-19T11:24:11Z

W dniu 19.03.2010 12:10, Tim Golden pisze:
It's not possible, it just happened :)
That would make structure of program much more complicated. I would have
to create queue for putting there queries and some other extra
variables/structure to receive output from db and some more for
controlling the execution flow of awaiting threads.

Re: sqlite3, memory db and multithreading

2010-03-19T11:10:29Z

Is it possible you've misunderstood the meaning of the word "serialize"
here? What's being suggested isn't serialising (ie marshalling, pickling)
the data; rather, serialising the *access*, ie pushing all db requests into
a queue which is read by one thread which manages the only db connection.
TJG

Re: sqlite3, memory db and multithreading

2010-03-19T11:04:16Z

W dniu 19.03.2010 08:20, Expo pisze:
I've tried this out but doesnt work. Still gives an error like:
ProgrammingError: SQLite objects created in a thread can only be used in
that same thread.The object was created in thread id -1216280896 and
this is thread id -1217107088

Re: sqlite3, memory db and multithreading

2010-03-19T10:56:54Z

W dniu 18.03.2010 23:06, Aahz pisze:
sqlite3 objects are not pickable so it's not proper way.

Re: sqlite3, memory db and multithreading

2010-03-19T10:55:57Z

W dniu 18.03.2010 15:49, DreiJane pisze:
It's my fault not saying what am I using to connect to sqlite db. It's
sqlite3 module. So there is no open() function etc. As for now I'm not
interested in rewriting my program to use apsw so is there any possible
way of working this out with sqlite3?

Re: logging: local functions ==> loss of lineno

2010-03-19T10:39:57Z

_scrFile is a private attribute of the logging module. Don't change it.
As you said yourself, 'The official way is probably to write a custom
Logger class that overrides
the findCaller() method'
JM

Re: Why this compile error?

2010-03-19T10:11:18Z

[...]
Was the comment there before or not? In any case, I believe a comment
doesn't qualify as indented block, if you want to leave the block empty
use 'pass' instead. Also, make sure you don't mix tabs and spaces, which is
also a popular way to confuse Python.
BTW: "while" doesn't need brackets, that's a C-ism. ;)

Re: Why this compile error?

2010-03-19T10:04:11Z

Jimbo a écrit :
(snip)
Indeed. You *need* a stamement in the while block. If you want a noop,
then use the 'pass' statement:
while programEnd == False:
pass
But note that as-is, this will go into an infinite loop.

Why this compile error?

2010-03-19T09:37:35Z

Hello
Can you help me figure out why I am getting this compile error with my
program. The error occurs right at the bottom of my code & I have
commented where it occurs.
The error is:
[QUOTE]Expected an indented block[/QUOTE]
[CODE]"""
*Stock Data Builder*
Algorithm:
- Search website for stock

exp_continue

2010-03-19T09:03:54Z

I am using pexpect module in python
I would like to know how I can use exp_continue here.
what is the alternative of exp_continue of perl/tcl in pexpect.

Re: installing something to a virtualenv when it's already in site-packages

2010-03-19T08:26:56Z

I use -U (--upgrade) to force the installation within virtualenv. e.g:
$ pip install -E env/ -U ipython
Regards,
Rolando

installing something to a virtualenv when it's already in site-packages

2010-03-19T08:05:03Z

I have ipython installed via apt. I can go to the command line and
type 'ipython' and it will work. If I try to install ipython to a
virtualenv, I get this:
$ pip install -E env/ ipython
Requirement already satisfied: ipython in /usr/share/pyshared
Installing collected packages: ipython
Successfully installed ipython

Re: logging: local functions ==> loss of lineno

2010-03-19T07:56:46Z

Have a look at Logger.findCaller() in logging/__init__.py. To find the
calling function it does something like
for frame in walk_callstack():
if filename_of(frame) == _srcfile:
continue
return filename_lineno_and_functionna me_of(frame)
The _srcfile is normally logging/__init__.py, and it is skipped because a

Re: sqlite3, memory db and multithreading

2010-03-19T07:20:32Z

You can put the SQLite database into a Singleton class and use a
semaphore to serialize the access to methods which writes to the
database.

Re: Python bindings tutorial

2010-03-19T07:01:46Z

* Tim Roberts:
This is a bit off-topic, but your explanation is incorrect in some key respects,
so (no offense) to avoid readers getting an incorrect impression:
Commonly called an "entry point".
This is the term you need to know about when e.g. linking object files.
Right, modulo terminology: there's only one "entry point" in a PE format file.