A flask extension using pyexcel to read, manipulate and write data in different excel formats: csv, ods, xls, xlsx and xlsm.
Branch: master
Clone or download
Latest commit 630fadd Nov 24, 2017
Type Name Latest commit message Commit time
Failed to load latest commit information.
.moban.d 📚 include pyexcel-handsontable to render the upload result Sep 3, 2017
docs 📚 update organisation Nov 24, 2017
examples 📝 fix broken code Sep 3, 2017
flask_excel support multiple app and try to confirm with flask-extension guide. a… Jul 10, 2017
tests support multiple app and try to confirm with flask-extension guide. a… Jul 10, 2017
.gitignore 📚 update documentations Aug 20, 2017
.moban.yml use latest setupmobans, and update renderer plugin list Jul 19, 2017
.travis.yml remove gs as install requires. related to pyexcel/pyexcel#105 Oct 23, 2017
CHANGELOG.rst release 0.0.7 Jul 20, 2017
LICENSE launch patreon support channel Apr 13, 2017
MANIFEST.in 🤝 take latest code from setupmobans, carrying LICENSE file, pyexcel/p… Oct 20, 2017
Makefile 📚 include pyexcel-handsontable to render the upload result Sep 3, 2017
README.rst 📚 update organisation Nov 24, 2017
document.bat adding file_name option to make_response Jan 13, 2016
document.sh 📚 include pyexcel-handsontable to render the upload result Sep 3, 2017
flask_excel.yaml 📚 update organisation Nov 24, 2017
requirements.txt increment version Jul 10, 2017
rnd_requirements.txt use master for testing Jul 11, 2017
sample-data.xls addressing #26: sheet name shall match table name in lower case Aug 6, 2017
setup.cfg update documentation May 7, 2017
setup.py 📚 update organisation Nov 24, 2017
test.bat 🤝 take latest code from setupmobans, carrying LICENSE file, pyexcel/p… Oct 20, 2017
test.sh 🤝 take latest code from setupmobans, carrying LICENSE file, pyexcel/p… Oct 20, 2017


Flask-Excel - Let you focus on data, instead of file formats

https://raw.githubusercontent.com/pyexcel/pyexcel.github.io/master/images/patreon.png https://api.travis-ci.org/pyexcel-webwares/Flask-Excel.svg?branch=master https://readthedocs.org/projects/flask-excel/badge/?version=latest

Support the project

If your company has embedded pyexcel and its components into a revenue generating product, please support me on patreon to maintain the project and develop it further.

If you are an individual, you are welcome to support me too on patreon and for however long you feel like. As a patreon, you will receive early access to pyexcel related contents.

With your financial support, I will be able to invest a little bit more time in coding, documentation and writing interesting posts.

Known constraints

Fonts, colors and charts are not supported.


Here is a typical conversation between the developer and the user:

User: "I have uploaded an excel file"
      "but your application says un-supported file format"
Developer: "Did you upload an xlsx file or a csv file?"
User: "Well, I am not sure. I saved the data using "
      "Microsoft Excel. Surely, it must be in an excel format."
Developer: "OK. Here is the thing. I were not told to support"
           "all available excel formats in day 1. Live with it"
           "or delay the project x number of days."

Flask-Excel is based on pyexcel and makes it easy to consume/produce information stored in excel files over HTTP protocol as well as on file system. This library can turn the excel data into a list of lists, a list of records(dictionaries), dictionaries of lists. And vice versa. Hence it lets you focus on data in Flask based web development, instead of file formats.

The idea originated from the common usability problem: when an excel file driven web application is delivered for non-developer users (ie: team assistant, human resource administrator etc). The fact is that not everyone knows (or cares) about the differences between various excel formats: csv, xls, xlsx are all the same to them. Instead of training those users about file formats, this library helps web developers to handle most of the excel file formats by providing a common programming interface. To add a specific excel file format type to you application, all you need is to install an extra pyexcel plugin. Hence no code changes to your application and no issues with excel file formats any more. Looking at the community, this library and its associated ones try to become a small and easy to install alternative to Pandas.

The highlighted features are:

  1. excel data import into and export from databases
  2. turn uploaded excel file directly into Python data structure
  3. pass Python data structures as an excel file download
  4. provide data persistence as an excel file in server side
  5. supports csv, tsv, csvz, tsvz by default and other formats are supported via the following plugins:
A list of file formats supported by external plugins
Package name Supported file formats Dependencies Python versions
pyexcel-io csv, csvz [1], tsv, tsvz [2]   2.6, 2.7, 3.3, 3.4, 3.5, 3.6 pypy
pyexcel-xls xls, xlsx(read only), xlsm(read only) xlrd, xlwt same as above
pyexcel-xlsx xlsx openpyxl same as above
pyexcel-ods3 ods pyexcel-ezodf, lxml 2.6, 2.7, 3.3, 3.4 3.5, 3.6
pyexcel-ods ods odfpy same as above
Dedicated file reader and writers
Package name Supported file formats Dependencies Python versions
pyexcel-xlsxw xlsx(write only) XlsxWriter Python 2 and 3
pyexcel-xlsxr xlsx(read only) lxml same as above
pyexcel-odsr read only for ods, fods lxml same as above
pyexcel-htmlr html(read only) lxml,html5lib same as above
Other data renderers
Package name Supported file formats Dependencies Python versions
pyexcel-text write only:rst, mediawiki, html, latex, grid, pipe, orgtbl, plain simple read only: ndjson r/w: json tabulate 2.6, 2.7, 3.3, 3.4 3.5, 3.6, pypy
pyexcel-handsontable handsontable in html handsontable same as above
pyexcel-pygal svg chart pygal 2.7, 3.3, 3.4, 3.5 3.6, pypy
pyexcel-sortable sortable table in html csvtotable same as above
pyexcel-gantt gantt chart in html frappe-gantt except pypy, same as above

In order to manage the list of plugins installed, you need to use pip to add or remove a plugin. When you use virtualenv, you can have different plugins per virtual environment. In the situation where you have multiple plugins that does the same thing in your environment, you need to tell pyexcel which plugin to use per function call. For example, pyexcel-ods and pyexcel-odsr, and you want to get_array to use pyexcel-odsr. You need to append get_array(..., library='pyexcel-odsr').


[1]zipped csv file
[2]zipped tsv file

This library makes information processing involving various excel files as easy as processing array, dictionary when processing file upload/download, data import into and export from SQL databases, information analysis and persistence. It uses pyexcel and its plugins:

  1. to provide one uniform programming interface to handle csv, tsv, xls, xlsx, xlsm and ods formats.
  2. to provide one-stop utility to import the data in uploaded file into a database and to export tables in a database as excel files for file download.
  3. to provide the same interface for information persistence at server side: saving a uploaded excel file to and loading a saved excel file from file system.

Tested Flask Versions


You can install Flask-Excel via pip:

$ pip install Flask-Excel

or clone it and install it:

$ git clone https://github.com/pyexcel-webwares/Flask-Excel.git
$ cd Flask-Excel
$ python setup.py install


Here are some example codes:

from flask import Flask, request, jsonify
import flask_excel


@app.route("/upload", methods=['GET', 'POST'])
def upload_file():
    if request.method == 'POST':
        return jsonify({"result": request.get_array(field_name='file')})
    return '''
    <!doctype html>
    <title>Upload an excel file</title>
    <h1>Excel file upload (csv, tsv, csvz, tsvz only)</h1>
    <form action="" method=post enctype=multipart/form-data>
    <p><input type=file name=file><input type=submit value=Upload>

@app.route("/export", methods=['GET'])
def export_records():
    return excel.make_response_from_array([[1,2], [3, 4]], "csv",

if __name__ == "__main__":

Development guide

Development steps for code changes

  1. git clone https://github.com/pyexcel/Flask-Excel.git
  2. cd Flask-Excel

Upgrade your setup tools and pip. They are needed for development and testing only:

  1. pip install --upgrade setuptools pip

Then install relevant development requirements:

  1. pip install -r rnd_requirements.txt # if such a file exists
  2. pip install -r requirements.txt
  3. pip install -r tests/requirements.txt

Once you have finished your changes, please provide test case(s), relevant documentation and update CHANGELOG.rst.


As to rnd_requirements.txt, usually, it is created when a dependent library is not released. Once the dependecy is installed (will be released), the future version of the dependency in the requirements.txt will be valid.

How to test your contribution

Although nose and doctest are both used in code testing, it is adviable that unit tests are put in tests. doctest is incorporated only to make sure the code examples in documentation remain valid across different development releases.

On Linux/Unix systems, please launch your tests like this:

$ make

On Windows systems, please issue this command:

> test.bat

How to update test environment and update documentation

Additional steps are required:

  1. pip install moban
  2. git clone https://github.com/moremoban/setupmobans.git # generic setup
  3. git clone https://github.com/pyexcel/pyexcel-commons.git commons
  4. make your changes in .moban.d directory, then issue command moban

What is pyexcel-commons

Many information that are shared across pyexcel projects, such as: this developer guide, license info, etc. are stored in pyexcel-commons project.

What is .moban.d

.moban.d stores the specific meta data for the library.

Acceptance criteria

  1. Has Test cases written
  2. Has all code lines tested
  3. Passes all Travis CI builds
  4. Has fair amount of documentation if your change is complex
  5. Please update CHANGELOG.rst
  6. Please add yourself to CONTRIBUTORS.rst
  7. Agree on NEW BSD License for your contribution


New BSD License