Because I usually like to read e-books, but some books only have azw3 version after downloading, and my most commonly used iBook only supports epub. Every time I go to Google to find an online conversion website, it is very troublesome to upload and convert, but what I want to read There are a lot of books, so I need a command line tool to help me solve this problem. I saw someone recommending Caliber on the Internet, so I downloaded it and gave it a try.

# Install

Project address: calibre-ebook.com Install Caliber with the following code:

sudo -v && wget -nv -O- https://download.calibre-ebook.com/linux-installer.sh | sudo sh /dev/stdin

# Example

Since the language I use most is Python, the examples here are run under Python3. Because my requirement is to input an e-book into the system and generate a total of three e-book formats, so it is necessary to check which one is not available first, and then convert to the corresponding format.

types = ['.mobi', '.azw3', '.epub'] #all formats
nohavetype = []
...
for i in types: #Find out the missing format
if i != booktype:
    nohavetype.append(i)
...
for i in nohavetype:#conversion format
convert = 'ebook-convert "./linshi/%s" "./linshi/%s%s"'%(name,booknamer,i)

The ellipsis in the middle is the code for some other functions.

# Epilogue

After using it for a period of time, the overall feeling is quite good. Only a few of the thousands of books have conversion problems, and most of them are problems with the files themselves, such as files that are too large or formatted incorrectly.