DBM is a simple UNIX database format. It uses a key-value storage and hashing for fast retrieval of the data by key.
Questions tagged [dbm]
98 questions
1
vote
1 answer
Django makemigrations error on many to many relationship
What i want:
Store information about running of group of people.
What i did:
from django.db import models
from django.contrib.auth.models import User
from datetime import timedelta
class Route(models.Model):
name =…
Naur
- 81
- 7
1
vote
0 answers
open attribute is not working for sqlite3dbm
I have to develop dbm module using sqlite. Hence I have imported sqlite3dbm with open attribute to create the new database. But it is saying "module 'sqlite3dbm' has no attribute 'open'". The code which i m trying to run is from internet. Is…
Bhagya
- 31
- 5
1
vote
1 answer
Convert Python shelve from dbm.gnu to dbm.dumb
I am trying to convert data stored in a non-dumb shelve to a dumb shelve, to be able to access my data at a location where the non-dumb libraries are not installed.
My test code for transforming the db data looks like this:
import numpy as np
import…
zanzu
- 25
- 4
1
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0 answers
Use dbm.ndbm / Berkeley DB to open a serialized Python shelve on a machine where only dbm.dumb seems to be installed
I am using a software package which generates serialized Python shelves.
On the remote machine where the shelves are generated, I can open them and process them perfectly.
However, when I copy them on my local machine, they cannot be opened…
zanzu
- 25
- 4
1
vote
1 answer
Export blob column from mysql dB to disk and replace it with new file name
So I'm working on a legacy database, and unfortunately the performance of database is very slow. Simple select query can take up to 10 seconds in tables with less than 10000 record.
So i tried to investigate problem and found out that deleting…
Zalaboza
- 8,899
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- 142
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0 answers
Strategy for converting JSON to DBM Hash File (AEM with Apache backend)
I'm looking for some solution design assistance, as an idea I thought I could mimic apache's httxt2dbm tool.
Use case:
We currently manage our 301 RewriteRule's in apache for our AEM environment. My co-worker has built a webform for end users to…
Nobe's
- 138
- 2
- 13
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1 answer
How to store an instance object in shelve?
instance1 = class_A()
shelve["key1"] = instance1
So instance1 is a reference to an instance of class_A stored in memory.
Does the above code dereferences the reference instance1 and stores the underlying object instance in shelve? Or does it only…
NoName
- 9,824
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1
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1 answer
When starting flower, I get the following: "dbm.error: db type is dbm.gnu, but the module is not available"
I am currently trying to setup a Python monitoring tool, called Flower, to check whether tasks are being successfully processed. Currently this is my setup is as follows:
ubuntu 18.04.2 LTS (GNU/Linux 4.15.0-1044-aws x86_64)
python 3.6.7
celery…
lollerskates
- 964
- 1
- 11
- 28
1
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1 answer
db2 update dbm cfg immediate
I am looking as the following article:
https://www.ibm.com/support/knowledgecenter/en/SSEPGG_10.1.0/com.ibm.db2.luw.admin.cmd.doc/doc/r0001988.html
I would like to ask about the IMMEDIATE and the DEFERRED part. Sorry I am still confuse and not…
Panadol Chong
- 1,793
- 13
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- 119
1
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1 answer
Python DBM KeyError
how can i print 'ok' when i find the a key value in the for
>>> with dbm.open('data1.db','r') as user:
user['0'] = '1'
user['1'] = '2'
user['2'] = '3'
for i in user:
if '3' in user[str(i)]:
print('ok')
Traceback…
Thomas Caio
- 83
- 1
- 1
- 11
1
vote
1 answer
Oracle tns listener error
I've just installed Oracle 10g When I try to connect to oracle db i get an error:
could not start OracleOraHome92TNSListener
when i got to services and try to start it, it says that the file doesnt exist. the service file is…
124697
- 22,097
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- 315
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0 answers
Process takes a long time to terminate, stuck in a stream of munmap
I have a Python 2.7 process (started by cron) on a Linux box that takes a very long time (10s of minutes) to terminate.
While it is running, it uses a lot of memory (25GB) and it appears to take a lot of time releasing it.
strace reports an endless…
sds
- 58,617
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- 161
- 278
1
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1 answer
recipe for working with compressed (any)dbm files in python
I have a big-ol' dbm file, that's being created and used by my python program. It saves a good amount of RAM, but it's getting big, and I suspect I'll have to gzip it soon to lower the footprint.
I guess usage will involve un-gzipping it to the…
Jay
- 2,535
- 3
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- 44
1
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1 answer
Syncing but not closing a dbm
Is it a problem to do :
import time
import dumbdbm
db = dumbdbm.open('db.db', 'c')
# modify the persistent dict / "DB" here
db['foo'] = 'bar'
db.sync()
while True:
# doing other things, sometimes modifying the db + syncing with…
Basj
- 41,386
- 99
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- 673
1
vote
2 answers
DBM::Deep is failing to import hashref having 'true' or 'false' values
I have the JSON text as given below :
test.json
{
"a" : false
}
I want to create the DBM::Deep hash for above JSON. My code is looks like as given below :
dbm.pl
use strict;
use warnings;
use DBM::Deep;
use JSON;
use Data::Dumper;
# create the…
CodeQuestor
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