Added a natural method of sorting

json_to_csv.py

@@ -12,6 +12,14 @@ def to_string(s):
         #Change the encoding type if needed
         return s.encode('utf-8')
 
+def sorted_nicely(l):
+    """
+    Sort the given iterable in the way that humans expect.
+    https://stackoverflow.com/a/2669120
+    """
+    convert = lambda text: int(text) if text.isdigit() else text
+    alphanum_key = lambda key: [convert(c) for c in re.split("([0-9]+)", key)]
+    return sorted(l, key=alphanum_key)
 
 ##
 # This function converts an item like 
@@ -87,12 +95,12 @@ def reduce_item(key, value):
             processed_data.append(reduced_item)
 
         header = list(set(header))
-        header.sort()
+        header = sorted_nicely(header)
 
         with open(csv_file_path, 'w+') as f:
             writer = csv.DictWriter(f, header, quoting=csv.QUOTE_ALL)
             writer.writeheader()
             for row in processed_data:
                 writer.writerow(row)
 
-        print ("Just completed writing csv file with %d columns" % len(header))
+        print ("Just completed writing csv file with %d columns" % len(header))