fCONV_AUSRICHTG is not defined - Why?

[Thomas Passin]

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.