For python 2:
>>> import urllib2
>>> print urllib2.unquote("%CE%B1%CE%BB%20")
αλ
For python 3:
>>> from urllib.parse import unquote
>>> print(unquote("%CE%B1%CE%BB%20"))
αλ
And here's code that works in all versions:
try:
from urllib import unquote
except ImportError:
from urllib.parse import unquote
print(unquote("%CE%B1%CE%BB%20"))
与恶龙缠斗过久,自身亦成为恶龙;凝视深渊过久,深渊将回以凝视…