Appending columns in DumpWriter
Created originally on Bitbucket by yfyf
Hi,
it would be nice to be able to append columns instead of rows when doing DumpWorksheet.append. In cases when the sheet is vertically big (i.e. very often) this can lead to dramatic (10x at least) performance improvements, because for example:
{{{ ws.append(range(10000)) }}}
is much faster than {{{ for elem in range(10000): ws.append([elem]) }}} Would append_column or something similar be hard to implement? I would be even willing to do it myself if you would point out what needs to be done.
Thanks, Ignas
P.S. openpyxl is a really nice library! Thanks for maintaining it, you are saving a lot of souls out there.
EDIT: spelling.