Using pydal for standalone scripts

[Tobiah via Python-list]

I am looking into creating a database abstraction library using pydal
and mysql as the engine.  I noticed that I have to specify a 'folder'
with the connection string to tell pydal where to save "table files".

So I'll have hundreds of different databases and install this library
on many machines.  Do I need to standardize a place for these files and
make sure that directory exists on every machine that uses the library?
It seems rather cumbersome.  I mean, couldn't pydal have just put
this information into the database in its own private table?


Thanks!
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Re: Configuring an object via a dictionary

[Tobiah via Python-list]

On 3/15/24 02:30, Loris Bennett wrote:

Hi,

I am initialising an object via the following:

 def __init__(self, config):

 self.connection = None

 self.source_name = config['source_name']
 self.server_host = config['server_host']



However, with a view to asking forgiveness rather than
permission, is there some simple way just to assign the dictionary
elements which do in fact exist to self-variables?


class Foo():

def __init__(self, config):

for key, val in config.iteritems():
setattr(self, key, val)

f = Foo({'cat': 'dog'})

print(f.cat)

(outputs 'dog')

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Re: Configuring an object via a dictionary

[Tobiah via Python-list]

I should mention that I wanted to answer your question,
but I wouldn't actually do this.  I'd rather opt for
your self.config = config solution.  The config options
should have their own namespace.

I don't mind at all referencing foo.config['option'],
or you could make foo.config an object by itself so
you can do foo.config.option.  You'd fill it's attributes
in the same way I suggested for your main object.




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python repl vi mode line editing not working.

[Tobiah via Python-list]

Kubuntu 24.04.


sinewave:toby ~(1)> cat .inputrc
set editing-mode vi
set keymap vi
sinewave:toby ~(1)> cat .editrc
bind -v
bind \\t rl_complete
sinewave:toby ~(1)> python
Python 2.7.18 (default, Jul  8 2024, 12:49:12)
[GCC 13.2.0] on linux2
Type "help", "copyright", "credits" or "license" for more information.
1  

1

2

2

^[k



I see the literal 'escape' character + 'k', when it should
let me edit previous commands.

I did have to compile my own python because I'm using 2.7 on
this machine.

Thanks for any help.


Toby
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Problem using mysql library

[Tobiah via Python-list]

sinewave:toby ~(1)> python
Python 2.7.18 (default, Jul  8 2024, 12:49:12)
[GCC 13.2.0] on linux2
Type "help", "copyright", "credits" or "license" for more information.

import MySQLdb

Traceback (most recent call last):
  File "", line 1, in 
  File "/usr/local/lib/python2.7/site-packages/MySQLdb/__init__.py", line 23, in 

(version_info, _mysql.version_info))
ImportError: this is MySQLdb version (1, 2, 5, 'final', 1), but _mysql is 
version (1, 4, 6, 'final', 0)


I Googled this a lot, and saw many people with the same problem,
but couldn't find an answer that helped.


Thanks!


Toby
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Re: python repl vi mode line editing not working.

[Tobiah via Python-list]

   For this to work, the Python implementation should use the same
   readline library as your shell, I guess.


It works in python3, so I guess my problem is that I'm
compiling python (I think kubuntu dropped python2), but
I don't see any relevant options  in the configure help.





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Re: python repl vi mode line editing not working.

[Tobiah via Python-list]

I see the literal 'escape' character + 'k', when it should
let me edit previous commands.

I did have to compile my own python because I'm using 2.7 on
this machine.



I figured it out.  I needed to apt install libreadline-dev.
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python3 package import difference?

[Tobiah via Python-list]

I have an old library from 20 some years ago
for use with python2, that is structured like this:

rcs
├── dbi
│   ├── __init__.py
│   ├── dbi.py
│   └── regos.py
└── __init__.py  --   *empty*


the __init__.py file under 'rcs' is empty.
The one under rcs.dbi contains:

from dbi import *
from regos import *


With python2, I'd go:

import rcs.dbi

then I'd have access to stuff in regos.py
as:

rcs.dbi.feature()  (Where 'feature' is defined in regos.py)


When I do the same import with python3, I get:

Traceback (most recent call last):
  File "/home/toby/me", line 1, in 
import rcs.dbi
  File "/usr/regos-1.0/lib/python/rcs/dbi/__init__.py", line 1, in 
from dbi import *
ModuleNotFoundError: No module named 'dbi'


What's changed, and how do I fix it?


Thanks!
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