Update README.md

README.md

@@ -40,6 +40,7 @@ The GUI looks like this:
 
 ---
 
+## GUI explanation
 
 ■ You can write your LaTeX formula in the frame under the label "Write yout LaTeX code:". Pressing the "Convert LaTeX code" left button under the LaTeX input frame a HTML code is generated. This code can be pasted into a GitHub README.md file so the desired formula can be generated. 
 It is asumed that the input is already in math mode. You can also start writing in the LaTeX frame as soon as the app is opened.
@@ -58,9 +59,11 @@ https://render.githubusercontent.com/render/math?math=--Formatted formula here--
 
 ■ In this app you can also view the result from the URL if internet connection is available. Keeping the "View image" checkbutton below the input frame checked, the formula can ve viewed on the "Image:" canvas on the lower right.
 
+<br>
+
 ---
 
-<br>
+## Example
 
 The following image is an example of use:
 
@@ -81,3 +84,44 @@ The result of the previous HTML code will be:
 <p align="center">
 <img src="https://render.githubusercontent.com/render/math?math=%5Cmathbf%7BR_z%7D(%5Ctheta)%0A%3D%0A%5Cbegin%7Bpmatrix%7D%0A%5Ccos%5Ctheta%20%26%20-%5Csin%5Ctheta%20%26%200%20%5C%5C%5B2ex%5D%0A%5Csin%5Ctheta%20%26%20%20%5Ccos%5Ctheta%20%26%200%20%5C%5C%5B2ex%5D%0A0%20%20%20%20%20%20%20%20%20%20%26%20%200%20%20%20%20%20%20%20%20%20%20%26%201%0A%5Cend%7Bpmatrix%7D%0A">
 </p>
+
+<br>
+
+---
+
+## Minimalistic Jupyter notebook
+
+In this repository there is also included a [minimalistic Jupyter notebook](https://github.com/artmenlope/LaTeX-to-GitHub-app/blob/master/LaTeX%20to%20GitHub%20minimalistic%20notebook.ipynb) with the essential functionality of the code: translating from LaTeX to HTML readable by the GitHub math renderer. This notebook only requires the urllib package. The code is the following:
+
+```python
+import urllib
+
+# Write your LaTeX code here.
+string = \
+r"""
+\begin{cases}
+a & = b \\[3ex]
+a & = b
+\end{cases}
+"""[1:-1] # Delete initial and final \n line jumps.
+
+encoded_string = urllib.parse.quote(str(string).encode("utf-8"), safe="~()*!.\"")
+github_url = "https://render.githubusercontent.com/render/math?math=" + encoded_string
+html_result = '<img src="' + github_url + encoded_string + '">'
+
+print("GitHub URL:\n\n", github_url, "\n\nHTML result:\n\n", html_result)
+```
+
+<br> 
+
+---
+
+## Notes
+
+This small app was developed in Windows 10 using the Spyder 4 IDE. It hasn't been tested on Linux.
+
+### To do:
+
+- [ ] Test in Ubuntu.
+- [ ] Make an executable file app.
+