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Old 07-14-2019, 01:38 AM   #1
davidfor
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pickle/cPickle problems

While trying to debug a problem with loading the configuration in the KoboTouchExtended driver, I had to find an older version of the configuration file. This is the .py type rather than the .py.json. file. With this, when I opened the driver configuration using 3.45.2, it reverted to the default configuration.

Running from source, I found an error message:

Code:
Failed to parse old style options string with error: loads() argument 1 must be string, not unicode
I did some checking, and the problem is in calibre\utils\config_base.py where it interprets the old config file. I added a "traceback.print_exc()" where the message was printed and got:

Code:
Traceback (most recent call last):
  File "E:\Development\GitHub\calibre\src\calibre\utils\config_base.py", line 291, in parse_old_style
  File "<string>", line 7, in <module>
TypeError: loads() argument 1 must be string, not unicode
Failed to parse old style options string with error: loads() argument 1 must be string, not unicode
Looking further, the problem is caused by these lines in the config file:
Code:
format_map = cPickle.loads('\x80\x02]q\x01(X\x05\x00\x00\x00kepubq\x02X\x04\x00\x00\x00epubq\x03X\x03\x00\x00\x00cbrq\x04X\x03\x00\x00\x00cbzq\x05X\x03\x00\x00\x00pdfq\x06X\x03\x00\x00\x00txtq\x07e.')

extra_customization = cPickle.loads('\x80\x02]q\x01(X\x12\x00\x00\x00#myshelves, seriesq\x02\x88\x89\x89\x89\x89\x89\x89\x89\x88\x89\x89X\x00\x00\x00\x00\x88\x89\x89\x89\x89\x89\x89X\x00\x00\x00\x00\x89e.')
The first one is going to be in the config files for all the different drivers. And testing opening the configuration for some of the other drivers that I have at some time or another configured, produced the same errors.

I did some testing with older versions, and this doesn't happen with any of the older versions. So, if they driver configurations have already been migrated to the JSON versions, they are migrated correctly. But, anyone who skipped straight to 3.45.x will lose their driver configuration.
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Old 07-14-2019, 06:55 AM   #2
kovidgoyal
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This should take care of it

https://github.com/kovidgoyal/calibr...18df8f0da317ed
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Old 07-14-2019, 07:12 AM   #3
davidfor
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That works. Thanks.
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