Holy is a Python script which uses ast module to convert a Python source code to Ruby.
Holy is basically a NodeVisitor with ruby output.
See ast documentation for more information
$ sudo pip install holy
$ holy <(<<EOF
for i in range(5,10):
print i
EOF)
The above will result in
5.upto(10) do |i|
puts i
end
Holy is in very early stages of development. If you want to contribute, please open an issue on github to discuss the matters.