Add recursive crawler, author list, JSON format, HTTPS and few fix

hindex.py

@@ -0,0 +1,33 @@
+#! /usr/bin/env python
+import json
+
+def hindex(maxyear, yearlist, minyear=1980):
+    hindex = 0
+
+    # Calculate citation number for a given year
+    paper = []
+    for line in yearlist.split('\n'):
+        citation = 0
+        tab = json.loads(line)
+        for year in tab.keys():
+            if len(year) > 1 and int(year) >= minyear and int(year) <= maxyear:
+                citation += tab[year]
+        paper.append(citation)
+
+    # Calculate h-index
+    rank = 0
+    for cite in sorted(paper, reverse=True):
+        rank += 1
+        if cite >= rank:
+            hindex += 1
+    return hindex
+
+
+infile = '{"1920":30, "2010": 10, "2012": 15}\n{"2010": 8}\n{"2010": 5}\n{"2010": 3, "2012": 1}\n{"2010": 3}'
+
+h = hindex(2010, infile)
+print('H-index:        ' + str(h))
+
+for date in range(2000, 2019):
+    h = hindex(date, infile)
+    print('H-index [' + str(date) + ']: ' + str(h))