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New in calibre 5.0

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Software

Welcome back, calibre users. It has been a year since calibre 4.0. The two headline features are Highlighting support in the calibre E-book viewer and that calibre has now moved to Python 3.

There has been a lot of work on the calibre E-book viewer. It now supports Highlighting. The highlights can be colors, underlines, strikethrough, etc. and have added notes. All highlights can be both stored in EPUB files for easy sharing and centrally in the calibre library for easy browsing. Additionally, the E-book viewer now supports both vertical and right-to-left text.

calibre has moved to using Python 3. This is because Python 2 was end-of-lifed this year. This should be completely transparent to calibre users, the only caveat being that some third party calibre plugins have not yet been ported to Python 3 and therefore will not work in calibre 5. For status on the various plugin ports, see here. This effort involved porting half-a-million lines of Python code and tens-of-thousands of lines of extension code to Python 3. This would not have been possible without the help of Eli Schwartz and Flaviu Tamas.

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Calibre E-book App 5.0 Released with Highlighting & Dark Mode

  • Calibre E-book App 5.0 Released with Highlighting & Dark Mode

    Calibre, cross-platform open-source comprehensive e-book software, released version 5.0 with some great new features.

    Calibre 5.0 features highlighting in the E-book viewer. Simply select text and click the Highlight selection button. It can be colors, underlines, strikethrough, etc. and has added notes. All highlights can be both stored in EPUB files and centrally in the Calibre library.

    The new release also feature Dark mode support. On Windows and Mac, it is activated automatically based on OS settings. In Ubuntu Linux, launch the software in dark mode via CALIBRE_USE_DARK_PALETTE=1 environment variable.

Calibre 5 Released with eBook Highlighting, Switches to Python 3

  • Calibre 5 Released with eBook Highlighting, Switches to Python 3

    Calibre 5.0 is the first version of the app to use Python 3 fully. I understand this sounds like a pretty boring “feature” to spotlight, but the switch is long overdue. Python 3 support gives the app a better footing on which future releases can stand, and ensures the app runs as securely and stably on modern Linux distributions.

    Not that it was an easy effort. Calibre devs say the process “…involved porting half-a-million lines of Python code and tens-of-thousands of lines of extension code to Python 3.”

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