bw2io.extractors.excel

Module Contents

Classes

ExcelExtractor

A class used to extract data from an Excel file.

Functions

get_cell_value_handle_error(cell)

Retrieve the value of a given cell and handle error types.

class bw2io.extractors.excel.ExcelExtractor

Bases: object

A class used to extract data from an Excel file.

Parameters

objecttype

The parent object for the ExcelExtractor class.

Returns

object

An instance of the class.

See Also

openpyxl.load_workbook : Load a workbook from a file.

Notes

This class requires the openpyxl package to be installed.

Raises

AssertionError

If the file at ‘filepath’ does not exist.

Parameters

filepathstr

The path to the Excel file.

Returns

list

A list of tuples containing the name of each sheet in the file and the data from each sheet.

Examples

>>> extractor = ExcelExtractor()
>>> filepath = 'example.xlsx'
>>> data = extractor.extract(filepath)

classmethod extract(filepath)

Extract data from an Excel file.

Parameters

filepathstr

The path to the Excel file.

Returns

list

A list of tuples containing the name of each sheet in the file and the data from each sheet.

Raises

AssertionError

If the file at ‘filepath’ does not exist.

classmethod extract_sheet(wb, name, strip=True)

Extract data from a single sheet in an Excel workbook.

Parameters

wbopenpyxl.workbook.Workbook

The workbook object with the sheet to extract data from.

namestr

The name of the sheet to extract data from.

stripbool, optional

If True, strip whitespace from cell values, by default True.

Returns

list

A list of lists containing the data from the sheet.

Notes

This method is called by the ‘extract’ method to extract the data from each sheet in the workbook.

Examples

>>> wb = openpyxl.load_workbook('example.xlsx')
>>> name = 'Sheet1'
>>> data = ExcelExtractor.extract_sheet(wb, sheetname)

bw2io.extractors.excel.get_cell_value_handle_error(cell)

Retrieve the value of a given cell and handle error types.

Parameters

cellopenpyxl.cell.cell.Cell

The cell to get the value from.

Returns

object

The value of the cell, or None if the cell has an error type.

Examples

>>> from openpyxl import Workbook
>>> wb = Workbook()
>>> ws = wb.active
>>> ws["A1"] = "hello"
>>> assert get_cell_value_handle_error(ws["A1"]) == "hello"
>>> ws["B1"] = "=1/0"
>>> assert get_cell_value_handle_error(ws["B1"]) == None