AttributeError: 'str' object has no attribute 'fetch'

[Mholscher (Menno Hölscher)]

@s_leo80

db='/media/l/LEO LAB/mydbfile.db'

The program goes ahead, but another traceback occurs:

Traceback (most recent call last):
  File "/media/l/LEO LAB/PySqliteTest.py", line 223, in <module>
    populate_list()
  File "/media/l/LEO LAB/PySqliteTest.py", line 86, in populate_list
    for row in db.fetch(hostname):
AttributeError: 'str' object has no attribute 'fetch'

Steven d’Aprano assumed you had been doing this and also proposed a solution.

@s_leo80

Last but not least I realized that despite the following line at the beginning of the code:

from tkinter import *

It doesn’t include tkinter messagebox then I’ve to add the following line before the program call the messagebox…and I do not understand why:

from tkinter import messagebox

That is because tkinter.messagebox is a module. Import it as such:

>>> import tkinter as tk
>>> import tkinter .messagebox as mb
>>> dir(mb)
['ABORT', 'ABORTRETRYIGNORE', 'CANCEL', 'Dialog', 'ERROR', 'IGNORE', 'INFO', 'Message', 'NO', 'OK', 'OKCANCEL', 'QUESTION', 'RETRY', 'RETRYCANCEL', 'WARNING', 'YES', 'YESNO', 'YESNOCANCEL', '__builtins__', '__cached__', '__doc__', '__file__', '__loader__', '__name__', '__package__', '__spec__', '_show', 'askokcancel', 'askquestion', 'askretrycancel', 'askyesno', 'askyesnocancel', 'showerror', 'showinfo', 'showwarning']
>>> 

…and there you see the messageboxes.