Why does this cause KeyError: 0?

[josh001]

I'm trying to figure out why KeyError: 0 pops up when I try to run the program containing the code.

 
OpenDLG = wx.FileDialog(
            self.win,
            message='Please choose the quiz or quizes that you wish to use.',
            defaultDir=os.getcwd(),
            defaultFile='',
            wildcard='*.*',
            style=wx.OPEN | wx.MULTIPLE | wx.CHANGE_DIR)
        self.AllWords = {}
        paths = OpenDLG.GetPaths()
        wordlistnum = -1
        if OpenDLG.ShowModal() == wx.ID_OK:
            for path in paths:
                textfile = open(path)
                words = textfile.readlines()
                french = []
                english = []
                Pass = 'no'
                wordlistnum +=1
                for word in words:
                    if Pass == 'yes':
                        english.append(word[0:-2])
                    if '#english#' in word:
                        Pass = 'yes'
                    if Pass == 'no':
                        if '#english#' not in word:
                            french.append(word[0:-2])
                self.AllWords.update(
                    {wordlistnum: {'French': french, 'English': english}})
 

The TXT File that I select contains the fallowing text.

 
bonjour
aurevoir
salut
#english#
hello
good bye
hey
 

In the hope that someone can help,
Josh

[bvdet]

Josh,

Can you post the full error message, including tracebacks? KeyError implies a problem with a dictionary key.

[kaarthikeyapreyan]

>>> foo={'a':1,'b':2}
>>> foo['c']
Traceback (most recent call last):
  File "<stdin>", line 1, in <module>
KeyError: 'c'

Key error is raised when a mapping (dictionary) key is not found in the set of existing keys. I think you are trying to access a non-existing dictionary key; post your complete code and error in case u don find the solution ;)
just in case you don prefer to get the key error use the get() method associated with the dictionary.get() returns a none value in case the key is not found

>>> value=foo.get('a')
>>> print value
1
>>> value=foo.get('c')
>>> print value
None
>>> 

[josh001]

But why is self.AllWords empty?
Is it something to do with the way I accessed the text file?

Here is the full Error code.

 
Traceback (most recent call last):
  File "C:\Documents and Settings\Joshua Leihe\My Documents\My Projects\NewProjects\Joshua\Python projects\French quiz\French Quiz_17.pyw.pyw", line 261, in French
    self.GameLoop(evt)
  File "C:\(path in which I stored the program)\French Quiz_17.pyw.pyw", line 190, in GameLoop
    self.French = self.AllWords[0]['French']
KeyError: 0
 

[bvdet]

Try adding some print statements to determine if your script is doing what you expect.

[kaarthikeyapreyan]

@josh001
Get the paths only after the event in the dialog completes. There were no files that were returned from the file dialog in its initial state, and hence self.AllWords was empty when u accessed it which caused the KeyError. try doing it this way

 
OpenDLG = wx.FileDialog(
            self.win,
            message='Please choose the quiz or quizes that you wish to use.',
            defaultDir=os.getcwd(),
            defaultFile='',
            wildcard='*.*',
            style=wx.OPEN | wx.MULTIPLE | wx.CHANGE_DIR)
        self.AllWords = {}
        wordlistnum = -1
        if OpenDLG.ShowModal() == wx.ID_OK:
            paths = OpenDLG.GetPaths()
            for path in paths:
                ...
 

[josh001]

That did it!
Funny how things like that matter so much.
I'll have to remember that.

Thanks Josh