Add distinct examples for Python 2 and 3 in the readme

README.md

@@ -24,31 +24,44 @@ How to access the catalogue using Python
 --------------
 It is very easy to access the Open Exoplanet Catalogue using python. Here is a short [snippet](https://gist.github.com/hannorein/2a069763cf114f66641c) to print out some basic planet data. No download, no installation and no external libraries are required.
 
+If you are using python 3:
+
 ```python
-# python 3.x
 import xml.etree.ElementTree as ET, urllib.request, gzip, io
 url = "https://github.com/OpenExoplanetCatalogue/oec_gzip/raw/master/systems.xml.gz"
 oec = ET.parse(gzip.GzipFile(fileobj=io.BytesIO(urllib.request.urlopen(url).read())))
 
 # Output mass and radius of all planets 
 for planet in oec.findall(".//planet"):
- print [planet.findtext("mass"), planet.findtext("radius")]
+ print([planet.findtext("mass"), planet.findtext("radius")])
 
 # Find all circumbinary planets 
 for planet in oec.findall(".//binary/planet"):
- print planet.findtext("name")
+ print(planet.findtext("name"))
 
 # Output distance to planetary system (in pc, if known) and number of planets in system
 for system in oec.findall(".//system"):
- print system.findtext("distance"), len(system.findall(".//planet"))
+ print(system.findtext("distance"), len(system.findall(".//planet")))
 ```
 
-If you are using python 2, replace the first three lines by 
+If you are using python 2:
 
 ```python
 import xml.etree.ElementTree as ET, urllib, gzip, io
 url = "https://github.com/OpenExoplanetCatalogue/oec_gzip/raw/master/systems.xml.gz"
 oec = ET.parse(gzip.GzipFile(fileobj=io.BytesIO(urllib.urlopen(url).read())))
+
+# Output mass and radius of all planets 
+for planet in oec.findall(".//planet"):
+ print [planet.findtext("mass"), planet.findtext("radius")]
+
+# Find all circumbinary planets 
+for planet in oec.findall(".//binary/planet"):
+ print planet.findtext("name")
+
+# Output distance to planetary system (in pc, if known) and number of planets in system
+for system in oec.findall(".//system"):
+ print system.findtext("distance"), len(system.findall(".//planet"))
 ```
 
 Data Structure