In python removing rows from a excel file using xlrd, xlwt, and xlutils

Question

Hello everyone and thank you in advance.

I have a python script where I am opening a template excel file, adding data (while preserving the style) and saving again.

Answer 1

For those of us still stuck with xlrd/xlwt/xlutils, here's a filter you could use:

from xlutils.filter import BaseFilter

class RowFilter(BaseFilter):
    rows_to_exclude: "Iterable[int]"
    _next_output_row: int

    def __init__(
            self,
            rows_to_exclude: "Iterable[int]",
    ):
        self.rows_to_exclude = rows_to_exclude
        self._next_output_row = -1

    def _should_include_row(self, rdrowx):
        return rdrowx not in self.rows_to_exclude

    def row(self, rdrowx, wtrowx):
        if self._should_include_row(rdrowx):
            # Proceed with writing out the row to the output file
            self._next_output_row += 1
            self.next.row(
                rdrowx, self._next_output_row,
            )

    # After `row()` has been called, `cell()` is called for each cell of the row
    def cell(self, rdrowx, rdcolx, wtrowx, wtcolx):
        if self._should_include_row(rdrowx):
            self.next.cell(
                rdrowx, rdcolx, self._next_output_row, wtcolx,
            )

Then put it to use with e.g.:

from xlrd import open_workbook
from xlutils.filter import DirectoryWriter, XLRDReader

xlutils.filter.process(
    XLRDReader(open_workbook("input_filename.xls", "output_filename.xls")),
    RowFilter([3, 4, 5]),
    DirectoryWriter("output_dir"),
)