Re: fCONV_AUSRICHTG is not defined - Why?

[Thomas Passin via Python-list]

On 11/7/2023 3:29 PM, MRAB via Python-list wrote:
On 2023-11-07 19:20, Jim Schwartz via Python-list wrote:
Where do you define fCONV_AUSRICHTG? It must be initialized or defined 
somewhere. Did you leave out a statement from the python 2 version?

It's given its value here:

     (
         fNAME,
         fLG1,
         fLG2,
         fTYP,
         fCONV_AUSRICHTG,
         fENTRY_AUSRICHTG,
         fTEXT_AUSRICHTUNG,
         fHOLFUNKT,
         fPRUEFFUNKT,
         fPRUEF_ARG,
     ) = list(range(10))


This construction is a sneaky way to assign index numbers to list 
entries.  A simplified example:

>>> S1 = 'string 1'
>>> S2 = 'string 2'
>>> (fS1, fS2) = list(range(2))
>>> fS1
0
>>>
>>> fS2
1




On Nov 7, 2023, at 1:06 PM, Thomas Passin via Python-list 
<python-list@python.org> wrote:

On 11/7/2023 12:47 PM, Egon Frerich via Python-list wrote:
I've no idea why this happens. In a module there are lists and 
definitions:
    Felder = [
        # Name       lg1  lg2 typ   Ausrichtung Holen Prüfen Prüfvorg
        ["Jahr", 4, 5, "u", "", "right", "center"],
        ["Monat", 2, 5, "u", "", "right", "center"],
        ["Tag", 2, 3, "u", "", "right", "center"],
        ["Belegnr", 5, 7, "s", "", "right", "center"],
        ["Bank", 2, 4, "u", "", "center", "center"],
        ["Art", 2, 3, "u", "", "center", "center"],
        ["Aufg", 2, 4, "u", "", "center", "center"],
        ["Text", 25, 25, "s", "-", "left", "left"],
        ["Ergänzung", 12, 12, "s", "-", "left", "left"],
        ["Betrag", 13, 13, "s", "", "right", "right"],
        ["W", 1, 2, "s", "", "center", "center"],
        ["WBetrag", 7, 7, "s", "", "right", "right"],
        ["Kurs", 6, 6, "s", "", "right", "right"],
    ]
    "Reihenfolge in der Dimension 1"
    (
        fJAHR,
        fMONAT,
        fTAG,
        fBELEGNR,
        fBANK,
        fART,
        fAUFGABE,
        fTEXT,
        fTEXTERG,
        fBETRAG,
        fWAEHRUNG,
        fBETRAGinWAEHRUNG,
        fUMRECHNUNGSKURS,
    ) = list(range(13))
    "Reihenfolge in der Dimension 2"
    (
        fNAME,
        fLG1,
        fLG2,
        fTYP,
        fCONV_AUSRICHTG,
        fENTRY_AUSRICHTG,
        fTEXT_AUSRICHTUNG,
        fHOLFUNKT,
        fPRUEFFUNKT,
        fPRUEF_ARG,
    ) = list(range(10))
Two lines with  test statements follow and the statement which 
produces an error:
    print(Felder)
    print(fJAHR, fNAME, fTYP, fCONV_AUSRICHTG)
    akette = "%" + "%".join(
        ["%s%s%s " % (i[fCONV_AUSRICHTG], i[fLG2], i[fTYP]) for i in 
Felder])
The traceback shows:
$ python3 testGeldspurGUI.py
[['Jahr', 4, 5, 'u', '', 'right', 'center'], ['Monat', 2, 5, 'u', 
'', 'right', 'center'], ['Tag', 2, 3, 'u', '', 'right', 'center'], 
['Belegnr', 5, 7, 's', '', 'right', 'center'], ['Bank', 2, 4, 'u', 
'', 'center', 'center'], ['Art', 2, 3, 'u', '', 'center', 'center'], 
['Aufg', 2, 4, 'u', '', 'center', 'center'], ['Text', 25, 25, 's', 
'-', 'left', 'left'], ['Ergänzung', 12, 12, 's', '-', 'left', 
'left'], ['Betrag', 13, 13, 's', '', 'right', 'right'], ['W', 1, 2, 
's', '', 'center', 'center'], ['WBetrag', 7, 7, 's', '', 'right', 
'right'], ['Kurs', 6, 6, 's', '', 'right', 'right']]
0 0 3 4
Traceback (most recent call last):
  File "/home/egon/Entw/Geldspur/geldspur/testGeldspurGUI.py", line 
15, in <module>
    from tests.testU2 import testU2
  File "/home/egon/Entw/Geldspur/geldspur/tests/testU2.py", line 9, 
in <module>
    from gui.GUI_Konfig import GUIcfg
  File "/home/egon/Entw/Geldspur/geldspur/gui/GUI_Konfig.py", line 
11, in <module>
    class GUIcfg:
  File "/home/egon/Entw/Geldspur/geldspur/gui/GUI_Konfig.py", line 
90, in GUIcfg
    ["%s%s%s " % (i[fCONV_AUSRICHTG], i[fLG2], i[fTYP]) for i in 
Felder])
  File "/home/egon/Entw/Geldspur/geldspur/gui/GUI_Konfig.py", line 
90, in <listcomp>
    ["%s%s%s " % (i[fCONV_AUSRICHTG], i[fLG2], i[fTYP]) for i in 
Felder])
NameError: name 'fCONV_AUSRICHTG' is not defined
You see "Felder" and with "0 0 3 4" the correct value 4 for 
fCONV_AUSRICHTG. But there is the NameError.
What does <listcomp> mean? Is there a change from python2 to python3?

You are using a syntax that I don't understand, but "listcomp" means 
a list comprehenson.



--
https://mail.python.org/mailman/listinfo/python-list