How to transcode a sheet of an excel file into csv

Suppose you have an example file as:

>>> import pyexcel as p
    >>> bookdict = {
    ...     "A": [[1]],
    ...     "B": [[2]],
    ...     "C": [[3]],
    ... }
>>> p.save_book_as(bookdict=bookdict, dest_file_name="example.xlsx")

Now, you would like to transcode sheet “B” into a csv file, you can do:

$ pyexcel transcode --sheet-name B example.xslx example-sheet-b.csv