ValueError: invalid literal for int() with base 10: '' python 3.4 tkinter

Question

I am calling my function mTime to get the values from 4 Entryboxes, to check the time, if there is a value my code works without a problem but if the entrybox is empty, just like ' ', I mean the user delete the default values in the entryboxes which are '0'. and leave it empty I want to assign a value of '0' if this happens

but it is not working!

my code

def mTime():
  if (len(str(Days_T.get())) == 0):
    dd = Days_T.set(0)
  else:
    dd = Days_T.get()
  if (len(str(Hours_T.get())) == 0):
    hh = Hours_T.set(0)
  else:
    hh = Hours_T.get()
  if (len(str(Minutes_T.get())) == 0):
    mm = Minutes_T.set(1)
  else:
    mm = Minutes_T.get()
  if (len(str(Seconds_T.get())) == 0):
    ss = Seconds_T.set(0)
  else:
    ss = Seconds_T.get()
  d = dd
  h = hh
  m = mm
  s = ss
  print (dd,hh,mm,ss)

Days_T = IntVar()
Hours_T = IntVar()
Minutes_T = IntVar()
Seconds_T = IntVar()

TDays = Entry(mGui, textvariable = Days_T, width = 4, justify = CENTER).place(x=520,y=260)
THours = Entry(mGui, textvariable = Hours_T, width = 4, justify = CENTER).place(x=550,y=260)
TMinutes = Entry(mGui, textvariable = Minutes_T, width = 4, justify = CENTER).place(x=580,y=260)
TSeconds = Entry(mGui, textvariable = Seconds_T, width = 4, justify = CENTER).place(x=610,y=260)

mTime()

I am getting this error

Exception in Tkinter callback
Traceback (most recent call last):
  File "C:\Python34\lib\tkinter\__init__.py", line 1533, in __call__
    return self.func(*args)
  File "C:\Users\me\Desktop\Project\ManualTab.py", line 908, in mTime
    if (len(str(Minutes_T.get())) == 0):
  File "C:\Python34\lib\tkinter\__init__.py", line 358, in get
    return getint(self._tk.globalgetvar(self._name))
ValueError: invalid literal for int() with base 10: ''

EDITED

NEW CODE

  ddays = StringVar()
  ddays.set(Days_T.get())
  hhours = StringVar()
  hhours.set(Hours_T.get())
  mminutes = StringVar()
  mminutes.set(Minutes_T.get())
  sseconds = StringVar()
  sseconds.set(Seconds_T.get())
  if (len(ddays) == 0):
    dd = Days_T.set(2)
  else:
    dd = Days_T.get()
  if (len(hhours) == 0):
    hh = Hours_T.set(0)
  else:
    hh = Hours_T.get()
  if (len(mminutes) == 0):
    mm = Minutes_T.set(0)
  else:
    mm = Minutes_T.get()
  if (len(sseconds) == 0):
    ss = Seconds_T.set(0)
  else:
    ss = Seconds_T.get()  
  d = dd
  h = hh
  m = mm
  s = ss
  print (dd,hh,mm,ss)

Days_T = IntVar()
Hours_T = IntVar()
Minutes_T = IntVar()
Seconds_T = IntVar()

TDays = Entry(mGui, textvariable = Days_T, width = 4, justify = CENTER).place(x=520,y=260)
THours = Entry(mGui, textvariable = Hours_T, width = 4, justify = CENTER).place(x=550,y=260)
TMinutes = Entry(mGui, textvariable = Minutes_T, width = 4, justify = CENTER).place(x=580,y=260)
TSeconds = Entry(mGui, textvariable = Seconds_T, width = 4, justify = CENTER).place(x=610,y=260)

mTime()

BUT IS NOT WORKING

You're setting `textvariable` to an `IntVar`. Use a `StringVar`. — Malik Brahimi, Jan 21 '15 at 02:54

score 2 · Answer 1 · answered Jan 21 '15 at 03:09

2

You're setting textvariable to an IntVar. Use a StringVar.

answered Jan 21 '15 at 03:09

Malik Brahimi

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it is a timer, so numbers are only allowed here not any character, that's why I use Int instead of String – Jose Fernando Gomez Davila Jan 21 '15 at 03:29
@Jose Sounds like you want to is validate the entry's input. For more information on that you should look at [Bryan Oakley's explanation of it](http://stackoverflow.com/a/4140988/3714930), [the New Mexico Tech page for it](http://infohost.nmt.edu/tcc/help/pubs/tkinter/web/entry-validation.html) and [effbot's explanation and example](http://effbot.org/zone/tkinter-entry-validate.htm). – fhdrsdg Jan 21 '15 at 09:45
Then cast the desired integers to strings and set them properly as `StringVar`. – Malik Brahimi Jan 21 '15 at 11:56
do you mean ddays = StringVar() ddays = str(Days_T.get()) if (len(ddays) == 0): dd = Days_T.set(10) else: dd = Days_T.get() and IT IS NOT WORKING – Jose Fernando Gomez Davila Jan 21 '15 at 22:58
`ddays = StringVar() ddays.set(Days_T.get())` – Malik Brahimi Jan 21 '15 at 23:00
Where is `ddays` by the way? – Malik Brahimi Jan 21 '15 at 23:02

score 0 · Accepted Answer · answered Jun 02 '16 at 11:41

I solved this problem a long time ago, but never put the answer here, anyway I used try and exempt to get and set a value to those entry boxes

here the code

    try:
        Days_T.get()
    except ValueError:
        Days_T.set(0)
        mGui.update()
    try:
        Hours_T.get()
    except ValueError:
        Hours_T.set(0)
        mGui.update()
    try:
        Minutes_T.get()
    except ValueError:
        Minutes_T.set(0)
        mGui.update()
    try:
        Seconds_T.get()
    except ValueError:
        Seconds_T.set(0)
        mGui.update()
    d = Days_T.get()
    h = Hours_T.get()
    m = Minutes_T.get()
    s = Seconds_T.get()

then I do not need to worry if the entry boxes are empty, it will just assign 0 if thay happens

ValueError: invalid literal for int() with base 10: '' python 3.4 tkinter

2 Answers2