Added wordcloud image and notebook

#260

README.md

@@ -15,6 +15,8 @@ It can also convert these documents **into** Jupyter
 Notebooks, allowing you to synchronize content in both
 directions.
 
+![](docs/jupytext_word_cloud.png)
+
 The languages that are currently supported by Jupytext are: Julia, Python, R, Bash, Scheme, Clojure, Matlab, Octave, C++, q/kdb+, IDL, TypeScript, Javascript, Scala, Rust/Evxcr, PowerShell and Robot Framework. Extending Jupytext to more languages should be easy - read more at [CONTRIBUTING.md](https://github.com/mwouts/jupytext/blob/master/CONTRIBUTING.md). In addition, jupytext users can choose between two formats for notebooks as scripts:
 - The `percent` format, compatible with several IDEs, including Spyder, Hydrogen, VScode and PyCharm. In that format, cells are delimited with a commented `%%`.
 - The `light` format, designed for this project. Use that format to open standard scripts as notebooks, or to save notebooks as scripts with few cell markers - none when possible.

binder/requirements.txt

@@ -2,6 +2,7 @@ jupytext>=1.2.0rc0
 jupyterlab>=1.0
 plotly
 matplotlib
+wordcloud
 pandas
 wbdata
 bash_kernel

demo/Jupytext's word cloud.py

@@ -0,0 +1,61 @@
+# This is a notebook that I used to generate Jupytext's word cloud.
+# To open this script as a notebook in JupyterLab, right-click on this file, and select _Open with/Notebook_.
+
+from wordcloud import WordCloud
+
+text = """
+Jupytext
+Notebook
+JupyterLab
+Git
+GitHub
+Version control
+Markdown
+R Markdown
+Text
+Scripts
+Code
+Notebook Template
+Binder
+Visual Studio Code
+PyCharm
+Atom
+Spyder
+Hydrogen
+RStudio
+Sphinx-Gallery
+Documentation
+black
+pytest
+autopep8
+Metadata
+Reproducible research
+R
+Julia
+Python
+Bash
+Powershell
+Scala
+Scheme
+Clojure
+Matlab
+Octave
+C++
+q/kdb+
+IDL
+TypeScript
+Javascript
+Scala
+Rust
+Robot Framework
+"""
+
+wordcloud = WordCloud(
+    random_state=1,
+    background_color='white',
+    width=1200, height=500
+).generate_from_frequencies({word: 1 for word in text.splitlines()})
+
+wordcloud.to_image()
+
+wordcloud.to_file('../docs/jupytext_word_cloud.png')

docs/index.md

@@ -1,5 +1,7 @@
 # Jupyter notebooks as Markdown documents, Julia, Python or R scripts
 
+![](jupytext_word_cloud.png)
+
 ## Contents
 
 * [Introduction](introduction)