pyexcel-export 0.2.18

Preserve good formatting when exporting to *.xlsx, *.yaml and *.json and when updating data.

pyexcel-export - Keep optimal formatting when exported to xlsx format

pyexcel-export is a wrapper around pyexcel, pyexcel-xlsx and openpyxl to read the formatting (stylesheets) and update the pre-existing file without destroying the stylesheets.

pyexcel-export also introduces two new exporting format, *.yaml and *.pyexcel.json which is based on NoIndentEncoder. This allows you to edit the spreadsheet in you favorite text editor, without being frustrated by automatically collapsed cells in Excel.

Known constraints

The "stylesheets" exported from Excel is in a very long base64 encoded format when exported to *.json or *.pyexcel.json, so exporting such to *.json is disabled by default.

As stylesheets copying works by openpyxl.worksheet.copier.WorksheetCopy, it may work only on values, styles, dimensions and merged cells, but charts might not be supported.

Installation

You can install pyexcel-export via pip:

$ pip install pyexcel-export

or clone it and install it.

Usage

For more documentation, see https://github.com/patarapolw/pyexcel-export/tree/master/docs

Read *.pyexcel.json

>>> from pyexcel_export import get_data
>>> from collections import OrderedDict
>>> data, meta = get_data('test.yaml')  # *.pyexcel.json is also possible.
>>> data
OrderedDict([('test', [['id', 'English', 'Pinyin', 'Hanzi', 'Audio', 'Tags'], [1419644212689, 'Hello!', 'Nǐ hǎo!', '你好！', '[sound:tmp1cctcn.mp3]', ''], [1419644212690, 'What are you saying?', 'Nǐ shuō shénme?', '你说什么？', '[sound:tmp4tzxbu.mp3]', ''], [1419644212691, 'What did you do?', 'nǐ zuò le shénme ?', '你做了什么？', '[sound:333012.mp3]', '']])])
>>> meta
Meta([
  ('created', '2018-07-15T05:32:43.976194'),
  ('modified', '2018-07-16T07:31:26.232350'),
  ('has_header', True),
  ('freeze_header', True),
  ('col_width_fit_param_keys', True),
  ('col_width_fit_ids', True),
  ('bool_as_string', True),
  ('allow_table_hiding', True),
  ('_styles', <_io.BytesIO object at 0x1065dff10>)
])
>>> meta.matrix
[('created', '2018-07-15T05:32:43.976194'), ('modified', '2018-07-15T05:32:52.248192'), ('has_header', True), ('freeze_header', True), ('col_width_fit_param_keys', True), ('col_width_fit_ids', True), ('allow_hidden_tables', True), ('_styles', {"<class '_io.BytesIO'>": <_io.BytesIO object at 0x1103d9048>})]
>>> meta.excel_matrix
[('created', '2018-07-15T05:32:43.976194'), ('modified', '2018-07-15T05:32:52.248192'), ('has_header', {"<class 'bool'>": True}), ('freeze_header', {"<class 'bool'>": True}), ('col_width_fit_param_keys', {"<class 'bool'>": True}), ('col_width_fit_ids', {"<class 'bool'>": True}), ('allow_hidden_tables', {"<class 'bool'>": True}), ('_styles', {"<class '_io.BytesIO'>": <_io.BytesIO object at 0x10b56b048>})]

Exporting stylesheets

>>> from pyexcel_export import get_meta
>>> get_meta()
Meta([
  ('created', '2018-07-15T05:32:43.976194'),
  ('has_header', True),
  ('freeze_header', True),
  ('col_width_fit_param_keys', True),
  ('col_width_fit_ids', True),
  ('bool_as_string', True),
  ('allow_table_hiding', True)
])
>>> get_meta('test.xlsx')
Meta([
  ('created', '2018-07-15T05:32:43.976194'),
  ('modified', '2018-07-16T07:31:26.232350'),
  ('has_header', True),
  ('freeze_header', True),
  ('col_width_fit_param_keys', True),
  ('col_width_fit_ids', True),
  ('bool_as_string', True),
  ('allow_table_hiding', True),
  ('_styles', <_io.BytesIO object at 0x1065dff10>)
])

Saving files, while preserving the formatting.

>>> from pyexcel_export import get_meta, save_data
>>> from collections import OrderedDict
>>> meta = get_meta('test.xlsx')
>>> data = OrderedDict()
>>> data.update({"Sheet 1": [["header A", "header B", "header C"], [1, 2, 3]]})
>>> save_data("your_file.xlsx", data, meta=meta)

Of course, you can use the ExcelLoader class directly

>>> from pyexcel_export import ExcelLoader
>>> loader = ExcelLoader("test.xlsx")
>>> loader.save("test.xlsx")

*.yaml format

_meta:
- [created, '2018-07-15T05:32:43.976194']
- [modified, '2018-07-16T07:45:53.534165']
- [has_header, true]
- [freeze_header, true]
- [col_width_fit_param_keys, true]
- [col_width_fit_ids, true]
- [bool_as_string, true]
- [allow_table_hiding, true]
test:
- [id, English, Pinyin, Hanzi, Audio, Tags]
- [1419644212689, Hello!, Nǐ hǎo!, 你好！, '[sound:tmp1cctcn.mp3]', '']
- [1419644212690, 'What are you saying?', 'Nǐ shuō shénme?', 你说什么？, '[sound:tmp4tzxbu.mp3]',
  '']
- [1419644212691, 'What did you do?', 'nǐ zuò le shénme ?', 你做了什么？, '[sound:333012.mp3]',
  '']

*.pyexcel.json format

{
  "_meta": [
    ["\"created\"", "\"2018-07-12T15:21:25.777499\""],
    ["\"modified\"", "\"2018-07-15T06:59:22.707162\""],
    ["\"has_header\"", "true"],
    ["\"freeze_header\"", "true"],
    ["\"col_width_fit_param_keys\"", "true"],
    ["\"col_width_fit_ids\"", "true"]
  ],
  "test": [
    ["\"id\"", "\"English\"", "\"Pinyin\"", "\"Hanzi\"", "\"Audio\"", "\"Tags\""],
    ["1419644212689", "\"Hello!\"", "\"Nǐ hǎo!\"", "\"你好！\"", "\"[sound:tmp1cctcn.mp3]\"", "\"\""],
    ["1419644212690", "\"What are you saying?\"", "\"Nǐ shuō shénme?\"", "\"你说什么？\"", "\"[sound:tmp4tzxbu.mp3]\"", "\"\""],
    ["1419644212691", "\"What did you do?\"", "\"nǐ zuò le shénme ?\"", "\"你做了什么？\"", "\"[sound:333012.mp3]\"", "\"\""]
  ]
}