def colstack(self, new, mode='<STR_LIT>'):
if isinstance(new, list):<EOL><INDENT>return tab_colstack([self] + new, mode)<EOL><DEDENT>else:<EOL><INDENT>return tab_colstack([self, new], mode)<EOL><DEDENT>
Horizontal stacking for tabarrays.

Stack tabarray(s) in `new` to the right of `self`.

**See also**

        :func:`tabular.tabarray.tab_colstack`, 
        :func:`tabular.spreadsheet.colstack`