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A pyramid extension that provides one application programming interface to read and write data in different excel file formats

Project description

pyramid-excel - Let you focus on data, instead of file formats

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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 to. 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."

**pyramid-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 Pyramid based web development, instead of file formats.

The idea originated from the common usability problem when developing an excel file
driven web applications for non-technical office workers: such as office assistant,
human resource administrator. The fact is that not all people know the
difference among various excel formats: csv, xls, xlsx. Instead of training those people
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
to you application, all you need is to install an extra pyexcel plugin. No code change
to your application. 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:

#. excel data import into and export from databases
#. turn uploaded excel file directly into Python data structure
#. pass Python data structures as an excel file download
#. provide data persistence as an excel file in server side
#. supports csv, tsv, csvz, tsvz by default and other formats are supported via
the following plugins:

.. _file-format-list:
.. _a-map-of-plugins-and-file-formats:

.. table:: A list of file formats supported by external plugins

======================== ======================= =============== ==================
Package name Supported file formats Dependencies Python versions
======================== ======================= =============== ==================
`pyexcel-io`_ csv, csvz [#f1]_, tsv, 2.6, 2.7, 3.3,
tsvz [#f2]_ 3.4, 3.5, 3.6
`pyexcel-xls`_ xls, xlsx(read only), `xlrd`_, same as above
xlsm(read only) `xlwt`_
`pyexcel-xlsx`_ xlsx `openpyxl`_ same as above
`pyexcel-xlsxw`_ xlsx(write only) `XlsxWriter`_ same as above
`pyexcel-ods3`_ ods `ezodf`_, 2.6, 2.7, 3.3, 3.4
lxml 3.5, 3.6
`pyexcel-ods`_ ods `odfpy`_ same as above
`pyexcel-odsr`_ ods(read only) lxml same as above
`pyexcel-text`_ (write only)json, rst, `tabulate`_ 2.6, 2.7, 3.3, 3.4
mediawiki, html, 3.5, 3.6, pypy
latex, grid, pipe,
orgtbl, plain simple
`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
======================== ======================= =============== ==================

.. _pyexcel-io:
.. _pyexcel-xls:
.. _pyexcel-xlsx:
.. _pyexcel-ods:
.. _pyexcel-ods3:
.. _pyexcel-odsr:
.. _pyexcel-xlsxw:

.. _xlrd:
.. _xlwt:
.. _openpyxl:
.. _XlsxWriter:
.. _ezodf:
.. _odfpy:

.. _pyexcel-text:
.. _tabulate:
.. _pyexcel-handsontable:
.. _handsontable:
.. _pyexcel-pygal:
.. _pygal:
.. _pyexcel-matplotlib:
.. _matplotlib:
.. _pyexcel-sortable:
.. _csvtotable:
.. _pyexcel-gantt:
.. _frappe-gantt:

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').

.. rubric:: Footnotes

.. [#f1] zipped csv file
.. [#f2] 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:

#. to provide one uniform programming interface to handle csv, tsv, xls, xlsx, xlsm and ods formats.
#. 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.
#. 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 Pyramid Versions

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You can install it via pip:

.. code-block:: bash

$ pip install pyramid-excel

or clone it and install it:

.. code-block:: bash

$ git clone
$ cd pyramid-excel
$ python install

Once the pyramid_excel is installed, you must use the config.include mechanism to include
it into your Pyramid project's configuration::

config = Configurator(.....)

Alternately, you may activate the extension by changing your application's .ini file by
adding it to the pyramid.includes list::

pyramid.includes = pyramid_excel

Development guide

Development steps for code changes

#. git clone
#. cd pyramid-excel

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

#. pip install --upgrade setuptools pip

Then install relevant development requirements:

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

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

.. note::

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:

#. pip install moban
#. git clone commons
#. 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

#. Has Test cases written
#. Has all code lines tested
#. Passes all Travis CI builds
#. Has fair amount of documentation if your change is complex
#. Agree on NEW BSD License for your contribution


New BSD License

Change log

0.0.5 - 20.07.2017


#. adapt pyexcel-webio 0.1.2 which brings iget_records, iget_array,
isave_to_database and isave_book_to_database.

0.0.4 - 29.06.2017


#. `issue 3 <>`_, Support
unicode code as download file name

0.0.3 - 16.03.2016


#. update dependencies on pyramid>=1.4.9, pyexcel-webio>=0.0.6
#. use moban to separate common texts from package specific info

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