Add scripts for extracting octaves indices

admin/documentation/Octave/README.md

+### Steps to extract the indices from `octave's official documentation` to add them to `qhp` under `keywords`
+Copy the `HTML` files named `Concept-Index.html`, `Function-Index.html` and `Operator-Index.html` from `octave-5.2.0/doc/interpreter/octave.html/` to here. Then run the python scripts named `concept_index_parser.py`, `function_index_parser.py` and `operator_index_parser.py` one by one using `python <script-name>`. On running these scripts, an output file named `output.txt` would be generated. It would be containing all the indices. Simply copy the file contents and paste under the `<keywords>` section inside `qhp` file.
+

admin/documentation/Octave/concept_index_parser.py

+# script to parse Concept-Index.html and collect all the keywords into index.txt
+
+from bs4 import BeautifulSoup
+
+def is_ascii(s):
+    return all(ord(c) < 128 for c in s)
+
+fp = open('./Concept-Index.html', 'r')
+fp2 = open('./index.txt', 'a')
+
+html = fp.read()
+soup = BeautifulSoup(html, features='html.parser')
+
+for i in soup.find_all('tr'):
+    link = i.findChildren()[1].findChild()
+    if link is not None:
+        if(is_ascii(link.text)):
+           fp2.write('<keyword name = "{}" ref = "{}"/>\n'.format(link.text, link['href']))
+
+fp.close()
+fp2.close()

admin/documentation/Octave/function_index_parser.py

+# script to parse Function-Index.html and collect all the keywords into index.txt
+
+from bs4 import BeautifulSoup
+
+fp = open('./Function-Index.html', 'r')
+fp2 = open('./index.txt', 'a')
+
+html = fp.read()
+soup = BeautifulSoup(html, features='html.parser')
+
+for i in soup.find_all('code'):
+    index = i.text
+    ref = i.find_parent('a')
+
+    fp2.write('<keyword name = "{}" ref = "{}"/>\n'.format(index, ref['href']))
+
+fp.close()
+fp2.close()

admin/documentation/Octave/operator_index_parser.py

+# script to parse Operator-Index.html and collect all the keywords into index.txt
+
+from bs4 import BeautifulSoup
+
+def is_ascii(s):
+    return all(ord(c) < 128 for c in s)
+
+fp = open('./Operator-Index.html', 'r')
+fp2 = open('./index.txt', 'a')
+
+html = fp.read()
+soup = BeautifulSoup(html, features='html.parser')
+
+for i in soup.find_all('tr'):
+    link = i.findChildren()[1].findChild()
+    if link is not None:
+        if(is_ascii(link.text)):
+           fp2.write('<keyword name = "{}" ref = "{}"/>\n'.format(link.text, link['href']))
+
+fp.close()
+fp2.close()