wxglade codegen causes exception error Cannot create a file when that file already exists

Hi All,

I've looked a bit further. It seems there might be a bug in line 517.
If the backup file already exists, you can't rename the current working
file to that file name. This bug has reared it's head a few times for me
already, because I'm working on existing code. It's even happened just
going round the development cycle loop a few times. Change GUI, save GUI
wxg file and regenerate code.

I'm not sure if the problem is caused by some earlier code, but the fix
even if temporary I implemented was to add a test to see if the backup
file exists, if so delete it and then do the rename of current file to
the backup file.

    try:
        if need_backup:
            # GGG added following two lines to delete existing back if
exists
            if os.path.isfile(filename + config.preferences.backup_suffix):
                os.remove(filename + config.preferences.backup_suffix)
            os.rename(filename, filename + config.preferences.backup_suffix)
            config.backed_up[filename] = True

Hope this helps. It seems to be working just fine now.

Regards
Graeme

> Exception type:      <type 'exceptions.WindowsError'>
> Exception details:   [Error 183] Cannot create a file when that file
> already exists
> Application stack trace:
> Stack frame at level 0
> ======================
>   File "C:\Program Files\wxGlade\common.py", line 517
>   Function
> "save_file(filename=u'C:\\src\\python\\effectivo02\\DialogCat.py',
> content='# -*- coding: ISO-8859-15 -*-\n#\n# generated by wxGlade
> 0.7.1 on Tue Jan 05 14:09:10 2016\n#\n\... n', which='codegen')"
>   Source code context:
>           outfile = None
>           try:
>               if need_backup:
>   ->571              os.rename(filename, filename +
> config.preferences.backup_suffix)
>                   config.backed_up[filename] = True
>      

Graeme G. Glenn
PEng. Dip Electronics BEng Comm Dip Theo
InfoComm Engineering
http://www.coolice.com.au/catalog/
<http://www.coolice.com.au/catalog/%3Ewww.coolice.com.au>
Ph: +61 3 9789 3547

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