dbfpy-users

[Dbfpy-users] add new field in a existing dbf

[Alonso L. T. T. <lu...@ce...>]

Hi!

I'm trying to modify a dbf adding a new field in a python script, but I 
can't.

Just I can add a field in new dbf created in the same script.

I tryed with:

    db = dbf.Dbf("../filesource.dbf",new =False, readOnly=False)
    ...
    db.addField(("PESO","N",32,8))

and return error:

    Traceback (most recent call last):
      File "script.py", line 34, in <module>
        db.addField(("PESO","N",32,8))
      File "/usr/lib/python2.5/site-packages/dbfpy/dbf.py", line 229, in
    addField
        "structure can't be changed")
    TypeError: ('At least one record was added, ', "structure can't be
    changed")


I have not idea of what error I make.

If someone can help me, I'll so gratefull.

Thanks!

Re: [Dbfpy-users] add new field in a existing dbf

[alexander s. <al...@ty...>]

Alonso Luján Torres Taño wrote, at 11.08.2009 13:55:
> 
> I'm trying to modify a dbf adding a new field in a python script, but I 
> can't.
> 
> Just I can add a field in new dbf created in the same script.
> 
> I tryed with:
> 
>     db = dbf.Dbf("../filesource.dbf",new =False, readOnly=False)
>     ...
>     db.addField(("PESO","N",32,8))
> 
> and return error:
> 
>     Traceback (most recent call last):
>       File "script.py", line 34, in <module>
>         db.addField(("PESO","N",32,8))
>       File "/usr/lib/python2.5/site-packages/dbfpy/dbf.py", line 229, in addField
>         "structure can't be changed")
>     TypeError: ('At least one record was added, ', "structure can't be changed")

you should create new dbf with desired structure and copy data.

best wishes,
alex.